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

64.9°F
Overcast
Conditions: Overcast
Humidity: 94%
Feels Like: 64.9°F
Wind: SW 2.7 mph
Wind Gusts: 3.9 mph
Pressure: 29.88 in
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 6 mi
UV Index: 0

Five Day Weather Forecast

Cloudy
Wed
H: 73°F
L: 60°F
Overcast
Thu
H: 61°F
L: 58°F
Mist
Fri
H: 62°F
L: 57°F
Sunny
Sat
H: 70°F
L: 58°F
Patchy rain nearby
Sun
H: 70°F
L: 59°F

Air Quality

AQI: 2 - Moderate
PM2.5: 11.47 μg/m3
PM10: 14.62 μg/m3
Carbon Monoxide: 214.6 μg/m3
Nitrogen Dioxide: 7.4 μg/m3
Sulphur Dioxide: 2.96 μg/m3
Ozone: 56 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 1:05 PM
Sunset: 7:24 PM
Daylight: 12 hrs 36 mins
Moonrise: 8:59 PM
Moon Transit: 3:14 AM
Moonset: 10:13 AM
Moon Phase: Waning Gibbous
Moon Illumination: 86.2%

Best Times for Fishing or Hunting

Major Periods

2:44 AM - 5:14 AM
10:43 AM - 1:13 PM

Minor Periods

8:29 PM - 9:59 PM
9:43 AM - 11:13 AM

Action Rating: 2 out of 5

Air Quality Alert issued September 3 at 4:06PM PDT by NWS Hanford CA

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Wed September 3, 2025, 4:06 PM
Expires: Wed September 10, 2025, 4:15 PM

The Valley Air District is issuing an Air Quality Alert on September 3, 2025, due to smoke impacts from wildfires in California including the Garnet Fire, the Marmon Fire, the Salt 11-2 Fire, and the TCU September Lightning Complex for San Joaquin, Stanislaus, Merced, Madera, Fresno, Kings, Tulare, and the Valley portion of Kern Counties. This Air Quality Alert is in effect until the fires are extinguished. Exposure to particle pollution can cause serious health problems, aggravate lung disease, cause asthma attacks and acute bronchitis, and increase risk of respiratory infections. Residents are advised to use caution as conditions warrant. People with heart or lung diseases should follow their doctors advice for dealing with episodes of unhealthy air quality. Additionally, older adults and children should avoid prolonged exposure, strenuous activities or heavy exertion, as conditions dictate. For additional information, call your local San Joaquin Valley Air District office. Modesto 209-557-6400, Fresno 559-230-6000, Bakersfield 661-392-5500 Residents can also follow air quality conditions by downloading the free Valley Air app, available in the Apple store or Google Play.


Air Quality Alert issued September 4 at 8:01AM PDT by NWS Hanford CA

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Thu September 4, 2025, 8:01 AM
Expires: Thu September 11, 2025, 8:15 AM

The Valley Air District is issuing an Air Quality Alert on September 3, 2025, due to smoke impacts from wildfires in California including the Garnet Fire, the Marmon Fire, the Salt 11-2 Fire, and the TCU September Lightning Complex for San Joaquin, Stanislaus, Merced, Madera, Fresno, Kings, Tulare, and the Valley portion of Kern Counties. This Air Quality Alert is in effect until the fires are extinguished. Exposure to particle pollution can cause serious health problems, aggravate lung disease, cause asthma attacks and acute bronchitis, and increase risk of respiratory infections. Residents are advised to use caution as conditions warrant. People with heart or lung diseases should follow their doctors advice for dealing with episodes of unhealthy air quality. Additionally, older adults and children should avoid prolonged exposure, strenuous activities or heavy exertion, as conditions dictate. For additional information, call your local San Joaquin Valley Air District office. Modesto 209-557-6400, Fresno 559-230-6000, Bakersfield 661-392-5500 Residents can also follow air quality conditions by downloading the free Valley Air app, available in the Apple store or Google Play, or by visiting the AirNow Fire and Smoke Map at fire.airnow.gov.


Air Quality Alert issued September 3 at 4:06PM PDT by NWS Hanford CA

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Wed September 3, 2025, 4:06 PM
Expires: Wed September 10, 2025, 4:15 PM

The Valley Air District is issuing an Air Quality Alert on September 3, 2025, due to smoke impacts from wildfires in California including the Garnet Fire, the Marmon Fire, the Salt 11-2 Fire, and the TCU September Lightning Complex for San Joaquin, Stanislaus, Merced, Madera, Fresno, Kings, Tulare, and the Valley portion of Kern Counties. This Air Quality Alert is in effect until the fires are extinguished. Exposure to particle pollution can cause serious health problems, aggravate lung disease, cause asthma attacks and acute bronchitis, and increase risk of respiratory infections. Residents are advised to use caution as conditions warrant. People with heart or lung diseases should follow their doctors advice for dealing with episodes of unhealthy air quality. Additionally, older adults and children should avoid prolonged exposure, strenuous activities or heavy exertion, as conditions dictate. For additional information, call your local San Joaquin Valley Air District office. Modesto 209-557-6400, Fresno 559-230-6000, Bakersfield 661-392-5500 Residents can also follow air quality conditions by downloading the free Valley Air app, available in the Apple store or Google Play.


Air Quality Alert issued September 4 at 8:01AM PDT by NWS Hanford CA

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Thu September 4, 2025, 8:01 AM
Expires: Thu September 11, 2025, 8:15 AM

The Valley Air District is issuing an Air Quality Alert on September 3, 2025, due to smoke impacts from wildfires in California including the Garnet Fire, the Marmon Fire, the Salt 11-2 Fire, and the TCU September Lightning Complex for San Joaquin, Stanislaus, Merced, Madera, Fresno, Kings, Tulare, and the Valley portion of Kern Counties. This Air Quality Alert is in effect until the fires are extinguished. Exposure to particle pollution can cause serious health problems, aggravate lung disease, cause asthma attacks and acute bronchitis, and increase risk of respiratory infections. Residents are advised to use caution as conditions warrant. People with heart or lung diseases should follow their doctors advice for dealing with episodes of unhealthy air quality. Additionally, older adults and children should avoid prolonged exposure, strenuous activities or heavy exertion, as conditions dictate. For additional information, call your local San Joaquin Valley Air District office. Modesto 209-557-6400, Fresno 559-230-6000, Bakersfield 661-392-5500 Residents can also follow air quality conditions by downloading the free Valley Air app, available in the Apple store or Google Play, or by visiting the AirNow Fire and Smoke Map at fire.airnow.gov.


Wednesday, September 10, 2025

Weather Forecast

Conditions: Cloudy
Average Temperature: 64.2°F
Average Humidity: 87%
Chance of Rain: 0%
Wind: 9.6 mph
UV Index: 1.4

Air Quality

AQI: 1 - Good
PM2.5: 14.49 μg/m3
PM10: 19.88 μg/m3
Carbon Monoxide: 214.23 μg/m3
Nitrogen Dioxide: 12.6 μg/m3
Sulphur Dioxide: 2.7 μg/m3
Ozone: 46.12 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 1:05 PM
Sunset: 7:24 PM
Daylight: 12 hrs 36 mins
Moonrise: 8:59 PM
Moon Transit: 3:14 AM
Moonset: 10:13 AM
Moon Phase: Waning Gibbous
Moon Illumination: 86.2%

Best Times for Fishing or Hunting

Major Periods

2:44 AM - 5:14 AM
10:43 AM - 1:13 PM

Minor Periods

8:29 PM - 9:59 PM
9:43 AM - 11:13 AM

Action Rating: 2 out of 5

Thursday, September 11, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 59.7°F
Average Humidity: 89%
Chance of Rain: 0%
Wind: 9.4 mph
UV Index: 1.5

Air Quality

AQI: 2 - Moderate
PM2.5: 20.02 μg/m3
PM10: 27.1 μg/m3
Carbon Monoxide: 257.08 μg/m3
Nitrogen Dioxide: 10.06 μg/m3
Sulphur Dioxide: 3.09 μg/m3
Ozone: 64.96 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 1:05 PM
Sunset: 7:22 PM
Daylight: 12 hrs 34 mins
Moonrise: 9:34 PM
Moon Transit: 4:07 AM
Moonset: 11:28 AM
Moon Phase: Waning Gibbous
Moon Illumination: 77.5%

Best Times for Fishing or Hunting

Major Periods

3:37 AM - 6:07 AM
11:37 AM - 2:07 PM

Minor Periods

9:04 PM - 10:34 PM
10:58 AM - 12:28 AM

Action Rating: 2 out of 5

Friday, September 12, 2025

Weather Forecast

Conditions: Mist
Average Temperature: 59.5°F
Average Humidity: 90%
Chance of Rain: 0%
Wind: 8.9 mph
UV Index: 1.4

Air Quality

AQI: 2 - Moderate
PM2.5: 22.27 μg/m3
PM10: 30.05 μg/m3
Carbon Monoxide: 233.4 μg/m3
Nitrogen Dioxide: 12.51 μg/m3
Sulphur Dioxide: 3.8 μg/m3
Ozone: 57.36 μg/m3

Astronomical

Sunrise: 6:49 AM
Sun Transit: 1:05 PM
Sunset: 7:20 PM
Daylight: 12 hrs 32 mins
Moonrise: 10:18 PM
Moon Transit: 5:04 AM
Moonset: 12:45 AM
Moon Phase: Waning Gibbous
Moon Illumination: 67.4%

Best Times for Fishing or Hunting

Major Periods

4:34 AM - 7:04 AM
12:35 AM - 3:05 PM

Minor Periods

9:48 PM - 11:18 PM
12:15 AM - 1:45 PM

Action Rating: 3 out of 5

Saturday, September 13, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 63°F
Average Humidity: 82%
Chance of Rain: 0%
Wind: 9.8 mph
UV Index: 1.5

Air Quality

AQI: 2 - Moderate
PM2.5: 22.77 μg/m3
PM10: 31.9 μg/m3
Carbon Monoxide: 216.08 μg/m3
Nitrogen Dioxide: 11.5 μg/m3
Sulphur Dioxide: 3.36 μg/m3
Ozone: 53.2 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 1:04 PM
Sunset: 7:19 PM
Daylight: 12 hrs 29 mins
Moonrise: 11:09 PM
Moon Transit: 6:04 AM
Moonset: 1:58 PM
Moon Phase: Waning Gibbous
Moon Illumination: 56.4%

Best Times for Fishing or Hunting

Major Periods

5:34 AM - 8:04 AM
1:36 PM - 4:06 PM

Minor Periods

12:00 AM - 12:00 AM
1:28 PM - 2:58 PM

Action Rating: 2 out of 5

Sunday, September 14, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 63.7°F
Average Humidity: 84%
Chance of Rain: 89%
Wind: 9.8 mph
UV Index: 0

Air Quality

AQI: 2 - Moderate
PM2.5: 17.42 μg/m3
PM10: 25.32 μg/m3
Carbon Monoxide: 212.89 μg/m3
Nitrogen Dioxide: 11.87 μg/m3
Sulphur Dioxide: 2.39 μg/m3
Ozone: 42.77 μg/m3

Astronomical

Sunrise: 6:51 AM
Sun Transit: 1:04 PM
Sunset: 7:17 PM
Daylight: 12 hrs 27 mins
Moonrise: 12:09 AM
Moon Transit: 7:06 AM
Moonset: 3:05 PM
Moon Phase: Last Quarter
Moon Illumination: 45.1%

Best Times for Fishing or Hunting

Major Periods

6:36 AM - 9:06 AM
2:38 PM - 5:08 PM

Minor Periods

2:35 PM - 4:05 PM
12:00 AM - 12:00 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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