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

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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 / 0 meters

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 (11.0 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 (21.0 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

44.6°F
Clear
Conditions: Clear
Humidity: 100%
Feels Like: 42.6°F
Wind: ENE 4 mph
Wind Gusts: 8.5 mph
Pressure: 30.18 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 8 mi
UV Index: 0

Five Day Weather Forecast

Sunny
Thu
H: 64°F
L: 44°F
Mist
Fri
H: 53°F
L: 48°F
Cloudy
Sat
H: 64°F
L: 46°F
Sunny
Sun
H: 59°F
L: 50°F
Sunny
Mon
H: 59°F
L: 49°F

Air Quality

AQI: 2 - Moderate
PM2.5: 25.45 μg/m3
PM10: 28.05 μg/m3
Carbon Monoxide: 357.85 μg/m3
Nitrogen Dioxide: 32.35 μg/m3
Sulphur Dioxide: 7.65 μg/m3
Ozone: 40 μg/m3

Astronomical

Sunrise: 7:02 AM
Sun Transit: 11:56 AM
Sunset: 4:52 PM
Daylight: 9 hrs 50 mins
Moonrise: 12:33 AM
Moon Transit: 6:03 PM
Moonset: 11:43 PM
Moon Phase: First Quarter
Moon Illumination: 46.5%

Best Times for Fishing or Hunting

Major Periods

12:44 AM - 3:14 AM
5:33 PM - 8:03 PM

Minor Periods

12:00 AM - 12:00 AM
12:03 AM - 1:33 PM

Action Rating: 2 out of 5

Dense Fog Advisory issued November 26 at 9:04PM PST until November 27 at 10:00AM PST by NWS San Francisco CA

Effective: Wed November 26, 2025, 9:04 PM
Expires: Thu November 27, 2025, 10:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...East Bay Interior Valleys. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Hazardous driving conditions due to low visibility.

If driving, slow down, use your headlights, not your brights, and leave plenty of distance ahead of you.


Dense Fog Advisory issued November 27 at 12:27AM PST until November 27 at 10:00AM PST by NWS San Francisco CA

Effective: Thu November 27, 2025, 12:27 AM
Expires: Thu November 27, 2025, 8:30 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...East Bay Interior Valleys. * WHEN...Until 10 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. Limited visibility will result in hazardous driving conditions.

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 November 27 at 12:27AM PST until November 27 at 10:00AM PST by NWS San Francisco CA

Effective: Thu November 27, 2025, 12:27 AM
Expires: Thu November 27, 2025, 8:30 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...North Bay Interior Valleys. * WHEN...Until 10 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. Limited visibility will result in hazardous driving conditions.

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.
Thursday, November 27, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 51.7°F
Average Humidity: 73%
Chance of Rain: 0%
Wind: 6.3 mph
UV Index: 0.5

Air Quality

AQI: 2 - Moderate
PM2.5: 31.1 μg/m3
PM10: 32.71 μg/m3
Carbon Monoxide: 430.57 μg/m3
Nitrogen Dioxide: 49.77 μg/m3
Sulphur Dioxide: 6.13 μg/m3
Ozone: 14.6 μg/m3

Astronomical

Sunrise: 7:02 AM
Sun Transit: 11:56 AM
Sunset: 4:52 PM
Daylight: 9 hrs 50 mins
Moonrise: 12:33 AM
Moon Transit: 6:03 PM
Moonset: 11:43 PM
Moon Phase: First Quarter
Moon Illumination: 46.5%

Best Times for Fishing or Hunting

Major Periods

12:44 AM - 3:14 AM
5:33 PM - 8:03 PM

Minor Periods

12:00 AM - 12:00 AM
12:03 AM - 1:33 PM

Action Rating: 2 out of 5

Friday, November 28, 2025

Weather Forecast

Conditions: Mist
Average Temperature: 50.8°F
Average Humidity: 97%
Chance of Rain: 0%
Wind: 6.7 mph
UV Index: 0.5

Air Quality

AQI: 1 - Good
PM2.5: 12.46 μg/m3
PM10: 15.34 μg/m3
Carbon Monoxide: 249.57 μg/m3
Nitrogen Dioxide: 17.95 μg/m3
Sulphur Dioxide: 3.52 μg/m3
Ozone: 58.76 μg/m3

Astronomical

Sunrise: 7:03 AM
Sun Transit: 11:57 AM
Sunset: 4:51 PM
Daylight: 9 hrs 49 mins
Moonrise: 12:58 AM
Moon Transit: 6:48 PM
Moonset: 12:43 AM
Moon Phase: First Quarter
Moon Illumination: 57.8%

Best Times for Fishing or Hunting

Major Periods

1:30 AM - 4:00 AM
6:18 PM - 8:48 PM

Minor Periods

12:28 AM - 1:58 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Saturday, November 29, 2025

Weather Forecast

Conditions: Cloudy
Average Temperature: 53°F
Average Humidity: 83%
Chance of Rain: 0%
Wind: 7.2 mph
UV Index: 0.4

Air Quality

AQI: 2 - Moderate
PM2.5: 18.13 μg/m3
PM10: 21.39 μg/m3
Carbon Monoxide: 234.05 μg/m3
Nitrogen Dioxide: 27.43 μg/m3
Sulphur Dioxide: 5.72 μg/m3
Ozone: 43.6 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 11:57 AM
Sunset: 4:51 PM
Daylight: 9 hrs 48 mins
Moonrise: 1:23 PM
Moon Transit: 6:12 PM
Moonset: 12:49 AM
Moon Phase: First Quarter
Moon Illumination: 68.7%

Best Times for Fishing or Hunting

Major Periods

2:15 AM - 4:45 AM
5:42 PM - 8:12 PM

Minor Periods

12:53 AM - 2:23 PM
12:19 AM - 1:49 AM

Action Rating: 2 out of 5

Sunday, November 30, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 53.9°F
Average Humidity: 76%
Chance of Rain: 0%
Wind: 6 mph
UV Index: 0.4

Air Quality

AQI: 2 - Moderate
PM2.5: 31.11 μg/m3
PM10: 31.82 μg/m3
Carbon Monoxide: 193.89 μg/m3
Nitrogen Dioxide: 52.18 μg/m3
Sulphur Dioxide: 8.25 μg/m3
Ozone: 11.2 μg/m3

Astronomical

Sunrise: 7:05 AM
Sun Transit: 11:57 AM
Sunset: 4:51 PM
Daylight: 9 hrs 46 mins
Moonrise: 1:49 PM
Moon Transit: 8:23 PM
Moonset: 1:58 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 78.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
7:53 PM - 10:23 PM

Minor Periods

1:19 PM - 2:49 PM
1:28 AM - 2:58 AM

Action Rating: 2 out of 5

Monday, December 1, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 53.1°F
Average Humidity: 63%
Chance of Rain: 0%
Wind: 4.3 mph
UV Index: 0

Air Quality

AQI: 2 - Moderate
PM2.5: 28.4 μg/m3
PM10: 30.57 μg/m3
Carbon Monoxide: 376.31 μg/m3
Nitrogen Dioxide: 50.15 μg/m3
Sulphur Dioxide: 7.94 μg/m3
Ozone: 10.85 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 11:58 AM
Sunset: 4:51 PM
Daylight: 9 hrs 45 mins
Moonrise: 2:18 PM
Moon Transit: 9:15 PM
Moonset: 3:09 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 87.1%

Best Times for Fishing or Hunting

Major Periods

3:51 AM - 6:21 AM
8:45 PM - 11:15 PM

Minor Periods

1:48 PM - 3:18 PM
2:39 AM - 4:09 AM

Action Rating: 2 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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