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

63.3°F
Mist
Mist
63.3°F
59.2°F
83%
W 4.5 mph
7.7 mph
59.2°F
57.8°F
0 in
0%
9 mi
1018 mbar
0

Five Day Weather Forecast

Sunny
Thu
H: 70°F
L: 57°F
Sunny
Fri
H: 72°F
L: 56°F
Sunny
Sat
H: 72°F
L: 56°F
Sunny
Sun
H: 71°F
L: 57°F
Sunny
Mon
H: 73°F
L: 56°F

Air Quality

AQI: 1 - Good
PM2.5: 10.2 μg/m3
PM10: 14.8 μg/m3
Carbon Monoxide: 101 μg/m3
Nitrogen Dioxide: 12.3 μg/m3
Sulphur Dioxide: 1.5 μg/m3
Ozone: 51 μg/m3

Astronomical

Sunrise: 6:06 AM
Sun Transit: 1:15 PM
Sunset: 8:25 PM
Daylight: 14 hrs 19 mins
Moonrise: 4:09 PM
Moon Transit: 8:53 PM
Moonset: 12:57 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

3:32 AM - 6:02 AM
8:23 PM - 10:53 PM

Minor Periods

3:39 PM - 5:09 PM
12:27 AM - 1:57 AM

Action Rating: 4 out of 5

Small Craft Advisory issued July 22 at 8:30PM PDT until July 23 at 9:00PM PDT by NWS San Francisco CA

Effective: Wed July 22, 2026, 8:30 PM
Expires: Thu July 23, 2026, 4:30 AM

* WHAT...West winds 10 to 15 kt and a moderate chop expected. * WHERE...San Francisco Bay South of the Bay Bridge. * WHEN...From 3 PM to 9 PM PDT Thursday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.


Small Craft Advisory issued July 22 at 3:10PM PDT until July 23 at 9:00PM PDT by NWS San Francisco CA

Effective: Wed July 22, 2026, 3:10 PM
Expires: Wed July 22, 2026, 11:15 PM

* WHAT...West winds 10 to 15 kt with frequent gusts to 25 kt and a moderate chop expected. * WHERE...San Francisco Bay South of the Bay Bridge. * WHEN...From 3 PM to 9 PM PDT Thursday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Thursday, July 23, 2026

Weather Forecast

Sunny
69.5°F
57.3°F
62.4°F
81%
0 in
14%
0%
12.1 mph
10.8


Air Quality

AQI: 1 - Good
PM2.5: 7.69 μg/m3
PM10: 11.13 μg/m3
Carbon Monoxide: 95.04 μg/m3
Nitrogen Dioxide: 6.98 μg/m3
Sulphur Dioxide: 1.03 μg/m3
Ozone: 58.33 μg/m3

Astronomical

Sunrise: 6:06 AM
Sun Transit: 1:15 PM
Sunset: 8:25 PM
Daylight: 14 hrs 19 mins
Moonrise: 4:09 PM
Moon Transit: 8:53 PM
Moonset: 12:57 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

3:32 AM - 6:02 AM
8:23 PM - 10:53 PM

Minor Periods

3:39 PM - 5:09 PM
12:27 AM - 1:57 AM

Action Rating: 4 out of 5

Friday, July 24, 2026

Weather Forecast

Sunny
71.8°F
55.7°F
62.7°F
76%
0 in
8%
0%
11.2 mph
10.3


Air Quality

AQI: 1 - Good
PM2.5: 6.46 μg/m3
PM10: 9.7 μg/m3
Carbon Monoxide: 89.83 μg/m3
Nitrogen Dioxide: 4.13 μg/m3
Sulphur Dioxide: 0.84 μg/m3
Ozone: 54.08 μg/m3

Astronomical

Sunrise: 6:07 AM
Sun Transit: 1:15 PM
Sunset: 8:24 PM
Daylight: 14 hrs 18 mins
Moonrise: 5:08 PM
Moon Transit: 9:43 PM
Moonset: 1:34 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

4:21 AM - 6:51 AM
9:13 PM - 11:43 PM

Minor Periods

4:38 PM - 6:08 PM
1:04 AM - 2:34 AM

Action Rating: 2 out of 5

Saturday, July 25, 2026

Weather Forecast

Sunny
71.9°F
56.1°F
63°F
75%
0 in
8%
0%
10.3 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 8.75 μg/m3
PM10: 13.23 μg/m3
Carbon Monoxide: 88.38 μg/m3
Nitrogen Dioxide: 4.62 μg/m3
Sulphur Dioxide: 0.84 μg/m3
Ozone: 51.58 μg/m3

Astronomical

Sunrise: 6:07 AM
Sun Transit: 1:15 PM
Sunset: 8:24 PM
Daylight: 14 hrs 16 mins
Moonrise: 6:04 PM
Moon Transit: 10:34 PM
Moonset: 2:17 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.2%

Best Times for Fishing or Hunting

Major Periods

5:12 AM - 7:42 AM
12:00 AM - 12:00 AM

Minor Periods

5:34 PM - 7:04 PM
1:47 AM - 3:17 AM

Action Rating: 2 out of 5

Sunday, July 26, 2026

Weather Forecast

Sunny
70.9°F
56.7°F
62.7°F
78%
0 in
11%
0%
10.5 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 7.36 μg/m3
PM10: 10.93 μg/m3
Carbon Monoxide: 92.35 μg/m3
Nitrogen Dioxide: 6.38 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 43.5 μg/m3

Astronomical

Sunrise: 6:08 AM
Sun Transit: 1:15 PM
Sunset: 8:23 PM
Daylight: 14 hrs 15 mins
Moonrise: 6:53 PM
Moon Transit: 11:26 PM
Moonset: 3:06 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.3%

Best Times for Fishing or Hunting

Major Periods

6:03 AM - 8:33 AM
12:00 AM - 12:00 AM

Minor Periods

6:23 PM - 7:53 PM
2:36 AM - 4:06 AM

Action Rating: 3 out of 5

Monday, July 27, 2026

Weather Forecast

Sunny
73.3°F
55.9°F
63°F
75%
0 in
8%
0%
10.3 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 9.32 μg/m3
PM10: 13.6 μg/m3
Carbon Monoxide: 99.33 μg/m3
Nitrogen Dioxide: 7.75 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 41.5 μg/m3

Astronomical

Sunrise: 6:09 AM
Sun Transit: 1:15 PM
Sunset: 8:22 PM
Daylight: 14 hrs 13 mins
Moonrise: 7:35 PM
Moon Transit: 12:00 AM
Moonset: 4:03 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
6:54 AM - 9:24 AM

Minor Periods

7:05 PM - 8:35 PM
3:33 AM - 5:03 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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