Water Temperature of San Francisco Bay in San Mateo, CA

Current Water Temperature

57.2°F

Measurement Time: Wednesday, March 4, 2020, 11:45 PM PST

Temperature Locations

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Local Points of Interest

San Mateo-Hayward Bridge; Foster City, CA; Burlingame, CA; Hayward, CA

San Francisco Bay

Station Name: SAN FRANCISCO BAY 2.8 MI N OF SAN MATEO BRIDGE CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 0 feet

Nearest Address:
San Francisco Bay
San Mateo, CA 94401
San Mateo County

GPS Coordinates: 37.63078889, -122.2432

Nearby Water Temperatures

Redwood Creek, Redwood City, CA (8.8 mi)
San Francisco Bay, Alameda, CA (10.2 mi)
San Francisco Bay, Menlo Park, CA (11 mi)
San Francisco Bay, San Francisco, CA (14.6 mi)
Coyote Creek, Alviso, CA (16.6 mi)
San Francisco Bay, San Francisco, CA (16.7 mi)
San Francisco Bay, San Francisco, CA (17.2 mi)
Rodeo Pond, Sausalito, CA (20.7 mi)
Rodeo Lagoon, Sausalito, CA (20.8 mi)
Rodeo Lagoon, Sausalito, CA (21 mi)
San Francisco Bay, Richmond, CA (22.3 mi)
Coyote Creek, San Jose, CA (22.5 mi)
San Francisco Bay, San Rafael, CA (23.8 mi)
Arroyo Valle, Livermore, CA (26.5 mi)
Arroyo Hondo, San Jose, CA (28.5 mi)

Weather for San Mateo, California

Current Weather

48.6°F

Conditions: Clear

Feels Like: 47.5°F

Heat Index: 50.7°F

Humidity: 93%

Wind: ENE 3.6 mph

Wind Gusts: 7.5 mph

Wind Chill: 49.7°F

Dew Point: 47.9°F

Precipitation: 0 in

Cloud Cover: 0%

Visibility: 9 mi

Air Pressure: 1018 mbar

UV Index: 0

Five Day Weather Forecast

Fri
H: 68°F
L: 42°F

Sat
H: 62°F
L: 42°F

Sun
H: 62°F
L: 51°F

Mon
H: 63°F
L: 50°F

Tue
H: 63°F
L: 50°F

Air Quality

PM2.5: 24.35 μg/m3

PM10: 24.55 μg/m3

Carbon Monoxide: 391.85 μg/m3
Nitrogen Dioxide: 46.55 μg/m3
Sulphur Dioxide: 4.95 μg/m3
Ozone: 3 μg/m3

Astronomical

Sunrise: 7:22 AM
Sun Transit: 12:18 AM
Sunset: 5:15 PM
Daylight: 9 hrs 53 mins

Moonrise: 6:09 AM
Moon Transit: 10:39 AM
Moonset: 3:12 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.5%

Best Times for Fishing or Hunting

Major Periods

6:08 PM - 8:38 PM
10:09 AM - 12:39 AM

Minor Periods

2:42 PM - 4:12 PM
5:39 AM - 7:09 AM

Action Rating: 3 out of 5

Beach Hazards Statement issued January 15 at 3:03AM PST until January 15 at 9:00PM PST by NWS San Francisco CA

Effective: Thu January 15, 2026, 3:03 AM
Expires: Thu January 15, 2026, 9:00 PM

* WHAT...An increased risk for sneaker waves and strong rip currents with breaking waves of 7 to 12 feet. * WHERE...Pacific Coast beaches. * WHEN...Through 9 PM PST this evening. * 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.

Dense Fog Advisory issued January 15 at 10:19PM PST until January 16 at 9:00AM PST by NWS San Francisco CA

Effective: Thu January 15, 2026, 10:19 PM
Expires: Fri January 16, 2026, 8:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...North Bay Interior Valleys. * WHEN...Until 9 AM PST Friday. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your low beam headlights, and leave plenty of distance ahead of you. Patchy dense fog will result in sudden changes in visibility. Visibility at times will fall below one-quarter of a mile. Use your low beam headlights, slow down, and be prepared for periods of hazardous driving conditions.

Friday, January 16, 2026

Weather Forecast

Conditions: Partly Cloudy

High Temperature: 67.6°F

Low Temperature: 42.4°F

Average Temperature: 53.6°F

Average Humidity: 76%

Precipitation: 0 in

Chance of Rain: 0%

Chance of Snow: 0%

Maximum Wind: 4 mph

UV Index: 0.5

Air Quality

AQI: 2 - Moderate

PM2.5: 24.09 μg/m3

PM10: 26.35 μg/m3

Carbon Monoxide: 385.57 μg/m3
Nitrogen Dioxide: 45.15 μg/m3
Sulphur Dioxide: 6.18 μg/m3
Ozone: 9.12 μg/m3

Astronomical

Sunrise: 7:22 AM
Sun Transit: 12:18 AM
Sunset: 5:15 PM
Daylight: 9 hrs 53 mins

Moonrise: 6:09 AM
Moon Transit: 10:39 AM
Moonset: 3:12 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.5%

Best Times for Fishing or Hunting

Major Periods

6:08 PM - 8:38 PM
10:09 AM - 12:39 AM

Minor Periods

2:42 PM - 4:12 PM
5:39 AM - 7:09 AM

Action Rating: 3 out of 5

Saturday, January 17, 2026

Weather Forecast

Conditions: Partly Cloudy

High Temperature: 62.2°F

Low Temperature: 41.5°F

Average Temperature: 51.8°F

Average Humidity: 75%

Precipitation: 0 in

Chance of Rain: 0%

Chance of Snow: 0%

Maximum Wind: 4.3 mph

UV Index: 0.5

Air Quality

AQI: 2 - Moderate

PM2.5: 26.26 μg/m3

PM10: 27.98 μg/m3

Carbon Monoxide: 425.88 μg/m3
Nitrogen Dioxide: 44.35 μg/m3
Sulphur Dioxide: 6.59 μg/m3
Ozone: 8.64 μg/m3

Astronomical

Sunrise: 7:22 AM
Sun Transit: 12:19 AM
Sunset: 5:16 PM
Daylight: 9 hrs 55 mins

Moonrise: 6:56 AM
Moon Transit: 11:32 AM
Moonset: 4:13 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

7:01 PM - 9:31 PM
11:02 AM - 1:32 PM

Minor Periods

3:43 PM - 5:13 PM
6:26 AM - 7:56 AM

Action Rating: 4 out of 5

Sunday, January 18, 2026

Weather Forecast

Conditions: Sunny

High Temperature: 62.1°F

Low Temperature: 50.7°F

Average Temperature: 55.3°F

Average Humidity: 62%

Precipitation: 0 in

Chance of Rain: 0%

Chance of Snow: 0%

Maximum Wind: 4.9 mph

UV Index: 0.5

Air Quality

AQI: 2 - Moderate

PM2.5: 32.71 μg/m3

PM10: 34.93 μg/m3

Carbon Monoxide: 633.95 μg/m3
Nitrogen Dioxide: 50.08 μg/m3
Sulphur Dioxide: 7.31 μg/m3
Ozone: 3 μg/m3

Astronomical

Sunrise: 7:21 AM
Sun Transit: 12:19 AM
Sunset: 5:17 PM
Daylight: 9 hrs 56 mins

Moonrise: 7:36 AM
Moon Transit: 12:23 AM
Moonset: 5:16 PM
Moon Phase: New
Moon Illumination: 2.5%

Best Times for Fishing or Hunting

Major Periods

7:51 PM - 10:21 PM
11:53 AM - 2:23 PM

Minor Periods

4:46 PM - 6:16 PM
7:06 AM - 8:36 AM

Action Rating: 4 out of 5

Monday, January 19, 2026

Weather Forecast

Conditions: Sunny

High Temperature: 62.5°F

Low Temperature: 50°F

Average Temperature: 54.1°F

Average Humidity: 61%

Precipitation: 0 in

Chance of Rain: 0%

Chance of Snow: 0%

Maximum Wind: 3.6 mph

UV Index: 0

Air Quality

AQI: 0 -

PM2.5: 0 μg/m3

PM10: 0 μg/m3

Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:21 AM
Sun Transit: 12:19 AM
Sunset: 5:19 PM
Daylight: 9 hrs 58 mins

Moonrise: 8:10 AM
Moon Transit: 1:12 PM
Moonset: 6:22 PM
Moon Phase: New
Moon Illumination: 0.4%

Best Times for Fishing or Hunting

Major Periods

8:40 PM - 11:10 PM
12:42 AM - 3:12 PM

Minor Periods

5:52 PM - 7:22 PM
7:40 AM - 9:10 AM

Action Rating: 4 out of 5

Tuesday, January 20, 2026

Weather Forecast

Conditions: Overcast

High Temperature: 62.6°F

Low Temperature: 50.4°F

Average Temperature: 55.5°F

Average Humidity: 65%

Precipitation: 0 in

Chance of Rain: 0%

Chance of Snow: 0%

Maximum Wind: 4 mph

UV Index: 3

Air Quality

AQI: 0 -

PM2.5: 0 μg/m3

PM10: 0 μg/m3

Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:20 AM
Sun Transit: 12:20 AM
Sunset: 5:20 PM
Daylight: 9 hrs 59 mins

Moonrise: 8:40 AM
Moon Transit: 2:00 PM
Moonset: 7:28 PM
Moon Phase: New
Moon Illumination: 3.1%

Best Times for Fishing or Hunting

Major Periods

9:26 PM - 11:56 PM
1:30 PM - 4:00 PM

Minor Periods

6:58 PM - 8:28 PM
8:10 AM - 9:40 AM

Action Rating: 3 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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Water Temperature of San Francisco Bay in San Mateo, CA

Current Water Temperature

Temperature Locations

Local Points of Interest

Nearby Water Temperatures

Weather for San Mateo, California

Current Weather

Five Day Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Beach Hazards Statement issued January 15 at 3:03AM PST until January 15 at 9:00PM PST by NWS San Francisco CA

Dense Fog Advisory issued January 15 at 10:19PM PST until January 16 at 9:00AM PST by NWS San Francisco CA

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Webcams Near San Mateo, CA

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