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

70°F
Sunny
Sunny
70°F
64.5°F
38%
NNE 3.4 mph
4.9 mph
64.2°F
47.3°F
0 in
0%
9 mi
1018 mbar
1.7

Five Day Weather Forecast

Partly Cloudy
Fri
H: 68°F
L: 42°F
Partly Cloudy
Sat
H: 62°F
L: 42°F
Sunny
Sun
H: 62°F
L: 51°F
Sunny
Mon
H: 63°F
L: 50°F
Overcast
Tue
H: 63°F
L: 50°F

Air Quality

PM2.5: 35.15 μg/m3
PM10: 36.85 μg/m3
Carbon Monoxide: 550.85 μg/m3
Nitrogen Dioxide: 49.25 μg/m3
Sulphur Dioxide: 8.35 μg/m3
Ozone: 0 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

Dense Fog Advisory issued January 16 at 12:52AM PST until January 16 at 9:00AM PST by NWS San Francisco CA

Effective: Fri January 16, 2026, 12:52 AM
Expires: Fri January 16, 2026, 9:00 AM

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

If driving, slow down, use your 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

Partly Cloudy
67.6°F
42.4°F
53.6°F
76%
0 in
0%
0%
4 mph
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

Partly Cloudy
62.2°F
41.5°F
51.8°F
75%
0 in
0%
0%
4.3 mph
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

Sunny
62.1°F
50.7°F
55.3°F
62%
0 in
0%
0%
4.9 mph
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

Sunny
62.5°F
50°F
54.1°F
61%
0 in
0%
0%
3.6 mph
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

Overcast
62.6°F
50.4°F
55.5°F
65%
0 in
0%
0%
4 mph
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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