Water Temperature of San Francisco Bay in San Mateo, CA

Current Water Temperature

57.2°F 14.0°C
Cold Thermal Gear Required
57.2°F
Frigid < 50°F
Cold 50°–60°
Cool 60°–70°
Comfortable 70°–80°
Warm 80°+

Cold shock risk with rapid dexterity loss (10–15 mins). Wetsuit or drysuit strongly advised for any immersion.

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

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

60.1°F
Partly Cloudy
Conditions: Partly Cloudy
Humidity: 74%
Feels Like: 58.5°F
Wind: ESE 4.9 mph
Wind Gusts: 15.7 mph
Pressure: 29.87 in
Precipitation: 0 in
Cloud Cover: 54%
Visibility: 13.2 mi
UV Index: 3.2

Five-Day Weather Forecast

Overcast
Thu
H: 63°F
L: 59°F
Heavy Rain
Fri
H: 61°F
L: 57°F
Overcast
Sat
H: 63°F
L: 54°F
Light Rain Showers
Sun
H: 67°F
L: 55°F
Moderate Drizzle
Mon
H: 60°F
L: 54°F

Air Quality

EPA Index 2 • Moderate

Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.

PM2.5
10 μg/m³
Good
PM10
13.7 μg/m³
Good
Ozone (O3)
65 μg/m³
Photochemical
NO2
15 μg/m³
Nitrogen Dioxide
SO2
1.2 μg/m³
Sulfur Dioxide
CO
225 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 14m daylight
Sunrise 6:46 AM
Solar Noon 11:53 AM
Sunset 5:00 PM
Moon
Waxing Crescent • 6%
Moonrise 10:13 AM
Transit 2:45 PM
Moonset 7:20 PM

Best Times for Fishing or Hunting

Major Periods

1:50 AM - 4:20 AM
2:15 PM - 4:45 PM

Minor Periods

9:43 AM - 11:13 AM
6:50 PM - 8:20 PM
Action Rating:
Good Action 3/5
Thursday, November 12, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 60.8°F
Average Humidity: 81%
Chance of Rain: 4%
Wind: 13 mph
UV Index: 3.9

Air Quality

EPA Index 2 • Moderate
PM2.5
9.1 μg/m³
Good
PM10
12.7 μg/m³
Good
Ozone (O3)
62.7 μg/m³
Photochemical
NO2
15 μg/m³
Nitrogen Dioxide
SO2
0.8 μg/m³
Sulfur Dioxide
CO
222.6 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 14m daylight
Sunrise 6:46 AM
Solar Noon 11:53 AM
Sunset 5:00 PM
Moon
Waxing Crescent • 6%
Moonrise 10:13 AM
Transit 2:45 PM
Moonset 7:20 PM

Best Times for Fishing or Hunting

Major Periods

1:50 AM - 4:20 AM
2:15 PM - 4:45 PM

Minor Periods

9:43 AM - 11:13 AM
6:50 PM - 8:20 PM
Action Rating:
Good Action 3/5
Friday, November 13, 2026

Weather Forecast

Conditions: Heavy Rain
Average Temperature: 60.1°F
Average Humidity: 81%
Chance of Rain: 93%
Wind: 27.2 mph
UV Index: 0.9

Air Quality

EPA Index 2 • Moderate
PM2.5
10.1 μg/m³
Good
PM10
16.7 μg/m³
Good
Ozone (O3)
79.8 μg/m³
Photochemical
NO2
5.4 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
126.6 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 12m daylight
Sunrise 6:47 AM
Solar Noon 11:53 AM
Sunset 4:59 PM
Moon
Waxing Crescent • 13%
Moonrise 10:58 AM
Transit 3:36 PM
Moonset 8:18 PM

Best Times for Fishing or Hunting

Major Periods

2:41 AM - 5:11 AM
3:06 PM - 5:36 PM

Minor Periods

10:28 AM - 11:58 AM
7:48 PM - 9:18 PM
Action Rating:
Fair Action 2/5
Saturday, November 14, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 59°F
Average Humidity: 67%
Chance of Rain: 45%
Wind: 6.5 mph
UV Index: 3.9

Air Quality

EPA Index 2 • Moderate
PM2.5
14.6 μg/m³
Moderate
PM10
23.3 μg/m³
Good
Ozone (O3)
70.5 μg/m³
Photochemical
NO2
10.6 μg/m³
Nitrogen Dioxide
SO2
0.9 μg/m³
Sulfur Dioxide
CO
155.5 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 10m daylight
Sunrise 6:48 AM
Solar Noon 11:53 AM
Sunset 4:59 PM
Moon
Waxing Crescent • 21%
Moonrise 11:37 AM
Transit 4:24 PM
Moonset 9:17 PM

Best Times for Fishing or Hunting

Major Periods

3:30 AM - 6:00 AM
3:54 PM - 6:24 PM

Minor Periods

11:07 AM - 12:37 PM
8:47 PM - 10:17 PM
Action Rating:
Fair Action 2/5
Sunday, November 15, 2026

Weather Forecast

Conditions: Light Rain Showers
Average Temperature: 59.7°F
Average Humidity: 66%
Chance of Rain: 89%
Wind: 10.8 mph
UV Index: 3.9

Air Quality

EPA Index 2 • Moderate
PM2.5
12.8 μg/m³
Moderate
PM10
20.3 μg/m³
Good
Ozone (O3)
74.3 μg/m³
Photochemical
NO2
8.4 μg/m³
Nitrogen Dioxide
SO2
0.6 μg/m³
Sulfur Dioxide
CO
149 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 9m daylight
Sunrise 6:49 AM
Solar Noon 11:53 AM
Sunset 4:58 PM
Moon
Waxing Crescent • 31%
Moonrise 12:10 PM
Transit 5:10 PM
Moonset 10:18 PM

Best Times for Fishing or Hunting

Major Periods

4:18 AM - 6:48 AM
4:40 PM - 7:10 PM

Minor Periods

11:40 AM - 1:10 PM
9:48 PM - 11:18 PM
Action Rating:
Very Good 4/5
Monday, November 16, 2026

Weather Forecast

Conditions: Moderate Drizzle
Average Temperature: 56.3°F
Average Humidity: 66%
Chance of Rain: 54%
Wind: 7.7 mph
UV Index: 3.5

Air Quality

EPA Index 2 • Moderate
PM2.5
7.6 μg/m³
Good
PM10
12.2 μg/m³
Good
Ozone (O3)
80.6 μg/m³
Photochemical
NO2
6.5 μg/m³
Nitrogen Dioxide
SO2
0.8 μg/m³
Sulfur Dioxide
CO
120 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 7m daylight
Sunrise 6:50 AM
Solar Noon 11:53 AM
Sunset 4:57 PM
Moon
First Quarter • 42%
Moonrise 12:39 PM
Transit 5:55 PM
Moonset 11:19 PM

Best Times for Fishing or Hunting

Major Periods

5:03 AM - 7:33 AM
5:25 PM - 7:55 PM

Minor Periods

12:09 PM - 1:39 PM
10:49 PM - 12:19 AM
Action Rating:
Good Action 3/5
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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