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

Coastal Flood Advisory issued December 29 at 1:13PM PST until January 4 at 2:00PM PST by NWS San Francisco CA

Effective: Mon December 29, 2025, 1:13 PM
Expires: Tue December 30, 2025, 5:00 AM

* WHAT...Up to 1.8 ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. * WHERE...San Francisco Bay and San Pablo Bay shoreline, Monterey Bay shoreline, and the Pacific Coast. * WHEN...From 5 AM Wednesday to 2 PM PST Sunday. * 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: 1.5 ft above normal (7.36 ft MLLW) at 7:51 AM Wednesday 12/31 1.7 ft above normal (7.55 ft MLLW) at 8:41 AM Thursday 1/1 1.8 ft above normal (7.66 ft MLLW) at 9:34 AM Friday 1/2 1.8 ft above normal (7.63 ft MLLW) at 10:26 AM Saturday 1/3 1.6 ft above normal (7.42 ft MLLW) at 11:18 AM Sunday 1/4 These predictions include 0.5 feet 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.

Coastal Flood Advisory issued December 30 at 4:05AM PST until January 4 at 2:00PM PST by NWS San Francisco CA

Effective: Tue December 30, 2025, 4:05 AM
Expires: Tue December 30, 2025, 3:00 PM

* WHAT...Up to 1.8 ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. * WHERE...San Francisco Bay and San Pablo Bay shoreline, Monterey Bay shoreline, and the Pacific Coast. * WHEN...From 5 AM Wednesday to 2 PM PST Sunday. * 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: 1.5 ft above normal (7.36 ft MLLW) at 7:51 AM Wednesday 12/31 1.7 ft above normal (7.55 ft MLLW) at 8:41 AM Thursday 1/1 1.8 ft above normal (7.66 ft MLLW) at 9:34 AM Friday 1/2 1.8 ft above normal (7.63 ft MLLW) at 10:26 AM Saturday 1/3 1.6 ft above normal (7.42 ft MLLW) at 11:18 AM Sunday 1/4 These predictions include 0.5 feet 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.

Cold Weather Advisory issued December 29 at 9:51PM PST until December 30 at 9:00AM PST by NWS San Francisco CA

Effective: Mon December 29, 2025, 9:51 PM
Expires: Tue December 30, 2025, 9:00 AM

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. For the Cold Weather Advisory, cold conditions with temperatures as low as 36 expected. * WHERE...East Bay Interior Valleys. * WHEN...For the Dense Fog Advisory, until 10 AM PST Tuesday. For the Cold Weather Advisory, from 1 AM to 9 AM PST Tuesday. * IMPACTS...Cold conditions will be hazardous to sensitive populations such as unhoused individuals. Prolonged exposure to the cold conditions will lead to hypothermia for people, pets, and livestock. Cold conditions may damage or kill sensitive crops, plants, and vegetation if appropriate precautions are not taken. Low visibility could make driving conditions hazardous.

Ensure portable heaters are working properly and are used correctly to avoid sparking a fire indoors. Do not use generators or grills inside as carbon monoxide poisoning can result. Check with your local, city, or county officials for information on available warming centers. Be sure to dress in layers if outdoors. Make sure that pets and livestock have adequate food, unfrozen water, and warmth. Cover or tend to sensitive crops, plants, and vegetation. If driving, slow down, use your headlights, and leave plenty of distance ahead of you. If commuting, allow extra drive time to reach your destination safely.

Cold Weather Advisory issued December 29 at 9:51PM PST until December 30 at 9:00AM PST by NWS San Francisco CA

Effective: Mon December 29, 2025, 9:51 PM
Expires: Tue December 30, 2025, 9:00 AM

* WHAT...Cold conditions with temperatures as low as 36 expected. * WHERE...Interior Monterey County and the Santa Lucia Range, Most of San Benito County and the Cholame Hills in Southeast Monterey County, North Bay Interior Mountains, Eastern Santa Clara Hills, East Bay Hills, and Southern Salinas Valley/Arroyo Seco and Lake San Antonio. * WHEN...From 1 AM to 9 AM PST Tuesday. * IMPACTS...Cold conditions will be hazardous to sensitive populations such as unhoused individuals. Prolonged exposure to the cold conditions will lead to hypothermia for people, pets, and livestock. Cold conditions may damage or kill sensitive crops, plants, and vegetation if appropriate precautions are not taken.

Ensure portable heaters are working properly and are used correctly to avoid sparking a fire indoors. Do not use generators or grills inside as carbon monoxide poisoning can result. Check with your local, city, or county officials for information on available warming centers. Be sure to dress in layers if outdoors. Make sure that pets and livestock have adequate food, unfrozen water, and warmth. Cover or tend to sensitive crops, plants, and vegetation.

Dense Fog Advisory issued December 29 at 9:51PM PST until December 30 at 10:00AM PST by NWS San Francisco CA

Effective: Mon December 29, 2025, 9:51 PM
Expires: Tue December 30, 2025, 9:00 AM

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. For the Cold Weather Advisory, cold conditions with temperatures as low as 36 expected. * WHERE...East Bay Interior Valleys. * WHEN...For the Dense Fog Advisory, until 10 AM PST Tuesday. For the Cold Weather Advisory, from 1 AM to 9 AM PST Tuesday. * IMPACTS...Cold conditions will be hazardous to sensitive populations such as unhoused individuals. Prolonged exposure to the cold conditions will lead to hypothermia for people, pets, and livestock. Cold conditions may damage or kill sensitive crops, plants, and vegetation if appropriate precautions are not taken. Low visibility could make driving conditions hazardous.

Ensure portable heaters are working properly and are used correctly to avoid sparking a fire indoors. Do not use generators or grills inside as carbon monoxide poisoning can result. Check with your local, city, or county officials for information on available warming centers. Be sure to dress in layers if outdoors. Make sure that pets and livestock have adequate food, unfrozen water, and warmth. Cover or tend to sensitive crops, plants, and vegetation. If driving, slow down, use your headlights, and leave plenty of distance ahead of you. If commuting, allow extra drive time to reach your destination safely.

Cold Weather Advisory issued December 29 at 9:51PM PST until December 30 at 9:00AM PST by NWS San Francisco CA

Effective: Mon December 29, 2025, 9:51 PM
Expires: Tue December 30, 2025, 9:00 AM

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. For the Cold Weather Advisory, cold conditions with temperatures as low as 36 expected. * WHERE...North Bay Interior Valleys. * WHEN...For the Dense Fog Advisory, until 10 AM PST Tuesday. For the Cold Weather Advisory, from 1 AM to 9 AM PST Tuesday. * IMPACTS...Cold conditions will be hazardous to sensitive populations such as unhoused individuals. Prolonged exposure to the cold conditions will lead to hypothermia for people, pets, and livestock. Cold conditions may damage or kill sensitive crops, plants, and vegetation if appropriate precautions are not taken. Low visibility could make driving conditions hazardous.

Ensure portable heaters are working properly and are used correctly to avoid sparking a fire indoors. Do not use generators or grills inside as carbon monoxide poisoning can result. Check with your local, city, or county officials for information on available warming centers. Be sure to dress in layers if outdoors. Make sure that pets and livestock have adequate food, unfrozen water, and warmth. Cover or tend to sensitive crops, plants, and vegetation. If driving, slow down, use your headlights, and leave plenty of distance ahead of you. If commuting, allow extra drive time to reach your destination safely.

Dense Fog Advisory issued December 29 at 9:51PM PST until December 30 at 10:00AM PST by NWS San Francisco CA

Effective: Mon December 29, 2025, 9:51 PM
Expires: Tue December 30, 2025, 9:00 AM

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. For the Cold Weather Advisory, cold conditions with temperatures as low as 36 expected. * WHERE...North Bay Interior Valleys. * WHEN...For the Dense Fog Advisory, until 10 AM PST Tuesday. For the Cold Weather Advisory, from 1 AM to 9 AM PST Tuesday. * IMPACTS...Cold conditions will be hazardous to sensitive populations such as unhoused individuals. Prolonged exposure to the cold conditions will lead to hypothermia for people, pets, and livestock. Cold conditions may damage or kill sensitive crops, plants, and vegetation if appropriate precautions are not taken. Low visibility could make driving conditions hazardous.

Ensure portable heaters are working properly and are used correctly to avoid sparking a fire indoors. Do not use generators or grills inside as carbon monoxide poisoning can result. Check with your local, city, or county officials for information on available warming centers. Be sure to dress in layers if outdoors. Make sure that pets and livestock have adequate food, unfrozen water, and warmth. Cover or tend to sensitive crops, plants, and vegetation. If driving, slow down, use your headlights, and leave plenty of distance ahead of you. If commuting, allow extra drive time to reach your destination safely.