Weather for San Mateo, California
Current Weather
Five Day Weather Forecast
Sun
H: 57°F
L: 49°F
Mon
H: 56°F
L: 47°F
Tue
H: 51°F
L: 41°F
Wed
H: 54°F
L: 44°F
Thu
H: 54°F
L: 49°F
Air Quality
Nitrogen Dioxide: 14.95 μg/m3
Sulphur Dioxide: 2.45 μg/m3
Ozone: 68 μg/m3
Astronomical
Sun Transit: 12:14 AM
Sunset: 5:04 PM
Daylight: 9 hrs 40 mins
Moon Transit: 1:13 AM
Moonset: 8:46 AM
Moon Phase: Full
Moon Illumination: 98.1%
Best Times for Fishing or Hunting
Major Periods
12:43 AM - 3:13 AM8:44 AM - 11:14 AM
Minor Periods
6:16 PM - 7:46 PM8:16 AM - 9:46 AM
Action Rating: 3 out of 5
Coastal Flood Advisory issued January 4 at 1:35AM PST until January 5 at 3:00PM PST by NWS San Francisco CA
Effective: Sun January 4, 2026, 1:35 AM
Expires: Sun January 4, 2026, 2:00 PM
* WHAT...Up to 2 ft of inundation above ground level is possible in low-lying near shorelines and tidal waterways. * WHERE...Areas adjacent to the San Francisco and San Pablo Bays. * WHEN...Until 3 PM PST Monday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide is expected to be: 1.9 ft above normal (7.7 ft MLLW) at 11:18 AM Sunday 1/4 1.2 ft above normal (7.0 ft MLLW) at 12:08 PM Monday 1/5 These predictions include up to 1 foot of storm surge that will enhance the astronomical tide and flooding threat. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively.
If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.
Beach Hazards Statement issued January 4 at 1:35AM PST until January 4 at 10:00PM PST by NWS San Francisco CA
Effective: Sun January 4, 2026, 1:35 AM
Expires: Sun January 4, 2026, 2:00 PM
* WHAT...For the Coastal Flood Advisory, up to 2 ft of inundation above ground level is possible in low-lying near shorelines and tidal waterways. For the Beach Hazards Statement, long period northwesterly swell will result in strong rip currents, sneaker waves, and breaking waves of up to 20 feet can be expected. * WHERE...Pacific Coast from Sonoma County to Monterey County including the Monterey Bay. * WHEN...For the Coastal Flood Advisory, until 2 PM PST Sunday. For the Beach Hazards Statement, from Sunday morning through Sunday evening. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. Dangerous conditions are forecast along the shoreline. Hazards include sneaker waves, strong rip currents, and large breaking waves. * ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide is expected to be: 1.9 ft above normal (7.7 ft MLLW) at 11:18 AM Sunday 1/4 These predictions include up to 1 foot of storm surge that will enhance the astronomical tide and flooding threat. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively.
If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. Stay off of jetties, piers, rocks, and other waterside infrastructure. Remain out of the water to avoid hazardous surf and NEVER turn your back on the ocean. Monitor local weather, surf and tide forecasts at www.weather.gov/mtr.
Coastal Flood Advisory issued January 4 at 1:35AM PST until January 4 at 2:00PM PST by NWS San Francisco CA
Effective: Sun January 4, 2026, 1:35 AM
Expires: Sun January 4, 2026, 2:00 PM
* WHAT...For the Coastal Flood Advisory, up to 2 ft of inundation above ground level is possible in low-lying near shorelines and tidal waterways. For the Beach Hazards Statement, long period northwesterly swell will result in strong rip currents, sneaker waves, and breaking waves of up to 20 feet can be expected. * WHERE...Pacific Coast from Sonoma County to Monterey County including the Monterey Bay. * WHEN...For the Coastal Flood Advisory, until 2 PM PST Sunday. For the Beach Hazards Statement, from Sunday morning through Sunday evening. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. Dangerous conditions are forecast along the shoreline. Hazards include sneaker waves, strong rip currents, and large breaking waves. * ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide is expected to be: 1.9 ft above normal (7.7 ft MLLW) at 11:18 AM Sunday 1/4 These predictions include up to 1 foot of storm surge that will enhance the astronomical tide and flooding threat. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively.
If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. Stay off of jetties, piers, rocks, and other waterside infrastructure. Remain out of the water to avoid hazardous surf and NEVER turn your back on the ocean. Monitor local weather, surf and tide forecasts at www.weather.gov/mtr.
Flood Advisory issued January 4 at 9:35AM PST until January 4 at 12:30PM PST by NWS San Francisco CA
Effective: Sun January 4, 2026, 9:35 AM
Expires: Sun January 4, 2026, 12:30 PM
* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...East Central San Mateo County in northern California... Northwestern Santa Clara County in northern California... * Until 1230 PM PST. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Water over roadways. Overflowing poor drainage areas. * ADDITIONAL DETAILS... - At 935 AM PST, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Between 1 and 1.5 inches of rain have fallen. - Additional rainfall amounts of 0.5 to 1 inch are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... San Jose, Fremont, Sunnyvale, Redwood City, Mountain View, Palo Alto, Cupertino, Menlo Park, Los Altos, East Palo Alto, Los Altos Hills, Atherton, Woodside, Stanford, North Fair Oaks, Portola Valley, West Menlo Park and Loyola. - http://www.weather.gov/safety/flood
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads.
Coastal Flood Advisory issued January 4 at 1:43PM PST until January 5 at 3:00PM PST by NWS San Francisco CA
Effective: Sun January 4, 2026, 1:43 PM
Expires: Sun January 4, 2026, 10:00 PM
* WHAT...Up to 2 ft of inundation above ground level is possible in low-lying near shorelines and tidal waterways. * WHERE...Areas adjacent to the San Francisco and San Pablo Bays. * WHEN...Until 3 PM PST Monday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide is expected to be: 1.2 ft above normal (7.0 ft MLLW) at 12:08 PM Monday 1/5. These predictions include up to 1 foot of storm surge that will enhance the astronomical tide and flooding threat. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively.
If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.
Beach Hazards Statement issued January 4 at 1:43PM PST until January 4 at 10:00PM PST by NWS San Francisco CA
Effective: Sun January 4, 2026, 1:43 PM
Expires: Sun January 4, 2026, 10:00 PM
* WHAT...For the Beach Hazards Statement, long period northwesterly swell will result in strong rip currents, sneaker waves, and breaking waves of up to 20 feet can be expected * WHERE...Pacific Coast from Sonoma County to Monterey County including the Monterey Bay. * WHEN...For the Beach Hazards Statement, from Sunday morning through 10 PM PST Sunday. * IMPACTS...Dangerous conditions are forecast along the shoreline. Hazards include sneaker waves, strong rip currents, and large breaking waves.
Stay off of jetties, piers, rocks, and other waterside infrastructure. Remain out of the water to avoid hazardous surf and NEVER turn your back on the ocean. Monitor local weather, surf and tide forecasts at www.weather.gov/mtr.
Coastal Flood Advisory issued January 4 at 1:35AM PST until January 5 at 3:00PM PST by NWS San Francisco CA
Effective: Sun January 4, 2026, 1:35 AM
Expires: Sun January 4, 2026, 2:00 PM
* WHAT...For the Coastal Flood Advisory, up to 2 ft of inundation above ground level is possible in low-lying near shorelines and tidal waterways. For the Beach Hazards Statement, long period northwesterly swell will result in strong rip currents, sneaker waves, and breaking waves of up to 20 feet can be expected. * WHERE...San Francisco. * WHEN...For the Coastal Flood Advisory, until 3 PM PST Monday. For the Beach Hazards Statement, from 6 AM PST this morning through this evening. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. Dangerous conditions are forecast along the shoreline. Hazards include sneaker waves, strong rip currents, and large breaking waves. * ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide is expected to be: 1.9 ft above normal (7.7 ft MLLW) at 11:18 AM Sunday 1/4 1.2 ft above normal (7.0 ft MLLW) at 12:08 PM Monday 1/5 These predictions include up to 1 foot of storm surge that will enhance the astronomical tide and flooding threat. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively.
If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. Stay off of jetties, piers, rocks, and other waterside infrastructure. Remain out of the water to avoid hazardous surf and NEVER turn your back on the ocean. Monitor local weather, surf and tide forecasts at www.weather.gov/mtr.
Beach Hazards Statement issued January 4 at 1:35AM PST until January 4 at 10:00PM PST by NWS San Francisco CA
Effective: Sun January 4, 2026, 1:35 AM
Expires: Sun January 4, 2026, 2:00 PM
* WHAT...For the Coastal Flood Advisory, up to 2 ft of inundation above ground level is possible in low-lying near shorelines and tidal waterways. For the Beach Hazards Statement, long period northwesterly swell will result in strong rip currents, sneaker waves, and breaking waves of up to 20 feet can be expected. * WHERE...San Francisco. * WHEN...For the Coastal Flood Advisory, until 3 PM PST Monday. For the Beach Hazards Statement, from 6 AM PST this morning through this evening. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. Dangerous conditions are forecast along the shoreline. Hazards include sneaker waves, strong rip currents, and large breaking waves. * ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide is expected to be: 1.9 ft above normal (7.7 ft MLLW) at 11:18 AM Sunday 1/4 1.2 ft above normal (7.0 ft MLLW) at 12:08 PM Monday 1/5 These predictions include up to 1 foot of storm surge that will enhance the astronomical tide and flooding threat. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively.
If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. Stay off of jetties, piers, rocks, and other waterside infrastructure. Remain out of the water to avoid hazardous surf and NEVER turn your back on the ocean. Monitor local weather, surf and tide forecasts at www.weather.gov/mtr.
Beach Hazards Statement issued January 4 at 1:43PM PST until January 4 at 10:00PM PST by NWS San Francisco CA
Effective: Sun January 4, 2026, 1:43 PM
Expires: Sun January 4, 2026, 10:00 PM
* WHAT...For the Coastal Flood Advisory, up to 2 ft of inundation above ground level is possible in low-lying near shorelines and tidal waterways. For the Beach Hazards Statement, long period northwesterly swell will result in strong rip currents, sneaker waves, and breaking waves of up to 20 feet can be expected. * WHERE...San Francisco. * WHEN...For the Coastal Flood Advisory, until 3 PM PST Monday. For the Beach Hazards Statement, from 6 AM PST this morning through 10 PM PST Sunday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. Dangerous conditions are forecast along the shoreline. Hazards include sneaker waves, strong rip currents, and large breaking waves. * ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide is expected to be: 1.2 ft above normal (7.0 ft MLLW) at 12:08 PM Monday 1/5. These predictions include up to 1 foot of storm surge that will enhance the astronomical tide and flooding threat. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively.
If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. Stay off of jetties, piers, rocks, and other waterside infrastructure. Remain out of the water to avoid hazardous surf and NEVER turn your back on the ocean. Monitor local weather, surf and tide forecasts at www.weather.gov/mtr.
Coastal Flood Advisory issued January 4 at 1:43PM PST until January 5 at 3:00PM PST by NWS San Francisco CA
Effective: Sun January 4, 2026, 1:43 PM
Expires: Sun January 4, 2026, 10:00 PM
* WHAT...For the Coastal Flood Advisory, up to 2 ft of inundation above ground level is possible in low-lying near shorelines and tidal waterways. For the Beach Hazards Statement, long period northwesterly swell will result in strong rip currents, sneaker waves, and breaking waves of up to 20 feet can be expected. * WHERE...San Francisco. * WHEN...For the Coastal Flood Advisory, until 3 PM PST Monday. For the Beach Hazards Statement, from 6 AM PST this morning through 10 PM PST Sunday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. Dangerous conditions are forecast along the shoreline. Hazards include sneaker waves, strong rip currents, and large breaking waves. * ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide is expected to be: 1.2 ft above normal (7.0 ft MLLW) at 12:08 PM Monday 1/5. These predictions include up to 1 foot of storm surge that will enhance the astronomical tide and flooding threat. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively.
If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. Stay off of jetties, piers, rocks, and other waterside infrastructure. Remain out of the water to avoid hazardous surf and NEVER turn your back on the ocean. Monitor local weather, surf and tide forecasts at www.weather.gov/mtr.
Flood Advisory issued January 4 at 9:50AM PST until January 4 at 12:45PM PST by NWS San Francisco CA
Effective: Sun January 4, 2026, 9:50 AM
Expires: Sun January 4, 2026, 12:45 PM
* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Central Alameda County in northern California... South Central Contra Costa County in northern California... * Until 1245 PM PST. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Water over roadways. Overflowing poor drainage areas. * ADDITIONAL DETAILS... - At 950 AM PST, Doppler radar indicated heavy rain. Minor flooding is ongoing or expected to begin shortly in the advisory area. Between 0.5 and 1 inch of rain has fallen. - Additional rainfall amounts of 0.2 to 0.7 inches are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Oakland, Fremont, Hayward, San Leandro, San Ramon, Pleasanton, Union City, Walnut Creek, Dublin, Newark, Danville, Castro Valley, San Lorenzo, Fairview, Cherryland, Ashland, Sunol, Diablo, Blackhawk-Camino Tassajara and Alamo. - http://www.weather.gov/safety/flood
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads.
Flood Advisory issued January 4 at 9:55AM PST until January 4 at 1:00PM PST by NWS San Francisco CA
Effective: Sun January 4, 2026, 9:55 AM
Expires: Sun January 4, 2026, 1:00 PM
* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...North Central Monterey County in central California... Northwestern San Benito County in central California... Southeastern Santa Clara County in northern California... Eastern Santa Cruz County in northern California... * Until 100 PM PST. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Water over roadways. * ADDITIONAL DETAILS... - At 955 AM PST, Doppler radar indicated heavy rain. Minor flooding is already occurring in the advisory area. Between 0.5 and 1 inch of rain has fallen. - Additional rainfall amounts of 0.2 to 0.7 inches are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Gilroy, Morgan Hill, Hollister, Ridgemark, Prunedale, Interlaken, San Juan Bautista, Aromas and San Martin. - http://www.weather.gov/safety/flood
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads.
Flood Advisory issued January 4 at 9:25AM PST until January 4 at 12:30PM PST by NWS San Francisco CA
Effective: Sun January 4, 2026, 9:25 AM
Expires: Sun January 4, 2026, 12:30 PM
* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...West Central Santa Clara County in northern California... Santa Cruz County in northern California... * Until 1230 PM PST. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Water over roadways. * ADDITIONAL DETAILS... - At 925 AM PST, Doppler radar and automated rain gauges indicated heavy rain due to thunderstorms. Minor flooding is already occurring in the advisory area. Between 0.5 and 2.5 inches of rain have fallen. - Additional rainfall amounts of 0.5 to 1 inch are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Santa Cruz, Corralitos, Scotts Valley, Capitola, Live Oak, Felton, Ben Lomond, Boulder Creek, Twin Lakes, Soquel, Opal Cliffs, Aptos, Rio Del Mar, Eureka Canyon Road, Lexington Hills, Day Valley and Aptos Hills-Larkin Valley. - http://www.weather.gov/safety/flood
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads.
Weather Forecast
Air Quality
Nitrogen Dioxide: 7.63 μg/m3
Sulphur Dioxide: 2.05 μg/m3
Ozone: 77.04 μg/m3
Astronomical
Sun Transit: 12:14 AM
Sunset: 5:04 PM
Daylight: 9 hrs 40 mins
Moon Transit: 1:13 AM
Moonset: 8:46 AM
Moon Phase: Full
Moon Illumination: 98.1%
Best Times for Fishing or Hunting
Major Periods
12:43 AM - 3:13 AM8:44 AM - 11:14 AM
Minor Periods
6:16 PM - 7:46 PM8:16 AM - 9:46 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 12.17 μg/m3
Sulphur Dioxide: 2.35 μg/m3
Ozone: 70.72 μg/m3
Astronomical
Sun Transit: 12:14 AM
Sunset: 5:05 PM
Daylight: 9 hrs 41 mins
Moon Transit: 2:10 AM
Moonset: 9:23 AM
Moon Phase: Full
Moon Illumination: 93.7%
Best Times for Fishing or Hunting
Major Periods
1:40 AM - 4:10 AM9:39 AM - 12:09 AM
Minor Periods
7:29 PM - 8:59 PM8:53 AM - 10:23 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 25.43 μg/m3
Sulphur Dioxide: 4.66 μg/m3
Ozone: 45.92 μg/m3
Astronomical
Sun Transit: 12:14 AM
Sunset: 5:06 PM
Daylight: 9 hrs 42 mins
Moon Transit: 3:01 AM
Moonset: 9:53 AM
Moon Phase: Waning Gibbous
Moon Illumination: 87.1%
Best Times for Fishing or Hunting
Major Periods
2:31 AM - 5:01 AM10:30 AM - 1:00 PM
Minor Periods
8:38 PM - 10:08 PM9:23 AM - 10:53 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 19.49 μg/m3
Sulphur Dioxide: 3.8 μg/m3
Ozone: 55.92 μg/m3
Astronomical
Sun Transit: 12:15 AM
Sunset: 5:07 PM
Daylight: 9 hrs 42 mins
Moon Transit: 3:48 AM
Moonset: 10:18 AM
Moon Phase: Waning Gibbous
Moon Illumination: 78.6%
Best Times for Fishing or Hunting
Major Periods
3:18 AM - 5:48 AM11:15 AM - 1:45 PM
Minor Periods
9:43 PM - 11:13 PM9:48 AM - 11:18 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 6.49 μg/m3
Sulphur Dioxide: 2.39 μg/m3
Ozone: 78.85 μg/m3
Astronomical
Sun Transit: 12:15 AM
Sunset: 5:07 PM
Daylight: 9 hrs 43 mins
Moon Transit: 4:32 AM
Moonset: 10:42 AM
Moon Phase: Waning Gibbous
Moon Illumination: 68.7%
Best Times for Fishing or Hunting
Major Periods
4:02 AM - 6:32 AM11:57 AM - 2:27 PM
Minor Periods
12:00 AM - 12:00 AM10:12 AM - 11:42 AM
Action Rating: 2 out of 5