Water Temperature of San Francisco Bay in San Rafael, CA

Current Water Temperature

54.5°F

Measurement Time: Sunday, December 21, 2025, 6:00 AM PST

Temperature Locations

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Local Points of Interest

Richmond, CA

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San Francisco Bay

Station Name: SAN FRANCISCO BAY A RICHMOND-SAN RAFAEL BRIDGE CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 0 feet / 0 meters

Nearest Address:
Richmond-San Rafael Bridge
San Rafael, CA 94801
Marin County

GPS Coordinates: 37.93527778, -122.4463889

Nearby Water Temperatures

San Francisco Bay, Richmond, CA (2.6 mi)
San Francisco Bay, San Francisco, CA (7.6 mi)
Rodeo Pond, Sausalito, CA (8.3 mi)
Rodeo Lagoon, Sausalito, CA (8.5 mi)
Rodeo Lagoon, Sausalito, CA (8.7 mi)
San Francisco Bay, San Francisco, CA (9.0 mi)
San Francisco Bay, San Francisco, CA (9.5 mi)
San Francisco Bay, Alameda, CA (13.8 mi)
Carquinez Strait, Martinez, CA (18.8 mi)
Suisun Bay, Concord, CA (23.7 mi)
San Francisco Bay, San Mateo, CA (23.8 mi)
Pacific Ocean, San Francisco, CA (24.8 mi)
Drakes Bay, Inverness, CA (29.0 mi)
Redwood Creek, Redwood City, CA (32.3 mi)
San Francisco Bay, Menlo Park, CA (34.7 mi)

Weather for San Rafael, California

Current Weather

61°F
Partly cloudy
Conditions: Partly cloudy
Humidity: 83%
Feels Like: 61°F
Wind: SSW 24.8 mph
Wind Gusts: 37.6 mph
Pressure: 29.95 in
Precipitation: 0.02 in
Cloud Cover: 75%
Visibility: 9 mi
UV Index: 0.1

Five Day Weather Forecast

Heavy rain
Sun
H: 57°F
L: 55°F
Heavy rain
Mon
H: 55°F
L: 53°F
Heavy rain
Tue
H: 56°F
L: 49°F
Heavy rain
Wed
H: 57°F
L: 51°F
Heavy rain
Thu
H: 55°F
L: 52°F

Air Quality

AQI: 1 - Good
PM2.5: 5.45 μg/m3
PM10: 6.85 μg/m3
Carbon Monoxide: 103.85 μg/m3
Nitrogen Dioxide: 7.55 μg/m3
Sulphur Dioxide: 1.95 μg/m3
Ozone: 57 μg/m3

Astronomical

Sunrise: 7:22 AM
Sun Transit: 12:08 AM
Sunset: 4:54 PM
Daylight: 9 hrs 32 mins
Moonrise: 9:00 AM
Moon Transit: 1:38 PM
Moonset: 6:22 PM
Moon Phase: New
Moon Illumination: 1.5%

Best Times for Fishing or Hunting

Major Periods

9:05 PM - 11:35 PM
1:08 PM - 3:38 PM

Minor Periods

5:52 PM - 7:22 PM
8:30 AM - 10:00 AM

Action Rating: 3 out of 5

Flood Watch issued December 20 at 11:32PM PST until December 22 at 4:00PM PST by NWS San Francisco CA

Effective: Sat December 20, 2025, 11:32 PM
Expires: Sun December 21, 2025, 2:00 PM

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Northern San Francisco Bay Area (Napa, Sonoma, and Marin counties). * WHEN...Through Monday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. * ADDITIONAL DETAILS... - Moderate to heavy rain associated with an atmospheric river will impact the region. 2-3" of rain is expected in the valleys during the watch period, with up to 6" in the coastal mountains. Area rivers, streams, and creeks that are prone to flooding could see rapid rises during and after heavy rainfall. There is a slight chance for flash flooding, particularly in urban areas Sunday and Monday. Debris flows are possible particularly for the Pickett Burn Scar. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.


Flood Watch issued December 20 at 1:03PM PST until December 26 at 4:00PM PST by NWS Sacramento CA

Effective: Sat December 20, 2025, 1:03 PM
Expires: Sun December 21, 2025, 4:00 PM

A series of warm atmospheric rivers will bring moderate to heavy rain to the Valley, foothills, and mountains the week of Christmas. The prolonged period of rain will bring the risk of flooding to the Sacramento Valley, northern San Joaquin Valley, northern Sierra Nevada and adjacent foothills, as well as the Coastal Range. * WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of northern California, including the following areas, the Sacramento Valley, northern San Joaquin Valley, Delta region, Sierra Nevada and adjacent foothills, and Coastal Range. * WHEN...Through Friday afternoon. * IMPACTS...Excessive runoff will result in rises along area rivers, creeks, streams. Small streams and creeks may rise out of their banks. Flooding may occur in low-lying, poor drainage, and urban areas. Mudslides and rockslides may occur in mountain and foothill areas. * ADDITIONAL DETAILS... - Periods of moderate to heavy rain are forecast the week of Christmas. Debris flows are not expected over recent burn scars, but do anticipate enhanced runoff in/below scars. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.


Sunday, December 21, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 55.6°F
Average Humidity: 94%
Chance of Rain: 89%
Wind: 26.4 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 5.83 μg/m3
PM10: 6.87 μg/m3
Carbon Monoxide: 173.73 μg/m3
Nitrogen Dioxide: 15.22 μg/m3
Sulphur Dioxide: 2.87 μg/m3
Ozone: 39.84 μg/m3

Astronomical

Sunrise: 7:22 AM
Sun Transit: 12:08 AM
Sunset: 4:54 PM
Daylight: 9 hrs 32 mins
Moonrise: 9:00 AM
Moon Transit: 1:38 PM
Moonset: 6:22 PM
Moon Phase: New
Moon Illumination: 1.5%

Best Times for Fishing or Hunting

Major Periods

9:05 PM - 11:35 PM
1:08 PM - 3:38 PM

Minor Periods

5:52 PM - 7:22 PM
8:30 AM - 10:00 AM

Action Rating: 3 out of 5

Monday, December 22, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 54.3°F
Average Humidity: 97%
Chance of Rain: 85%
Wind: 6.3 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 6.3 μg/m3
PM10: 7.49 μg/m3
Carbon Monoxide: 139.17 μg/m3
Nitrogen Dioxide: 12.4 μg/m3
Sulphur Dioxide: 2.79 μg/m3
Ozone: 44.76 μg/m3

Astronomical

Sunrise: 7:22 AM
Sun Transit: 12:08 AM
Sunset: 4:55 PM
Daylight: 9 hrs 32 mins
Moonrise: 9:38 AM
Moon Transit: 2:28 PM
Moonset: 7:26 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:58 PM - 4:28 PM

Minor Periods

6:56 PM - 8:26 PM
9:08 AM - 10:38 AM

Action Rating: 3 out of 5

Tuesday, December 23, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 52.9°F
Average Humidity: 92%
Chance of Rain: 89%
Wind: 21.9 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 8.49 μg/m3
PM10: 10.79 μg/m3
Carbon Monoxide: 236.21 μg/m3
Nitrogen Dioxide: 23.37 μg/m3
Sulphur Dioxide: 3.62 μg/m3
Ozone: 30.6 μg/m3

Astronomical

Sunrise: 7:23 AM
Sun Transit: 12:09 AM
Sunset: 4:55 PM
Daylight: 9 hrs 32 mins
Moonrise: 10:10 AM
Moon Transit: 3:16 PM
Moonset: 8:31 PM
Moon Phase: Waxing Crescent
Moon Illumination: 11.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:46 PM - 5:16 PM

Minor Periods

8:01 PM - 9:31 PM
9:40 AM - 11:10 AM

Action Rating: 3 out of 5

Wednesday, December 24, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 53.9°F
Average Humidity: 84%
Chance of Rain: 85%
Wind: 28.4 mph
UV Index: 0.3

Air Quality

AQI: 1 - Good
PM2.5: 5.28 μg/m3
PM10: 9.21 μg/m3
Carbon Monoxide: 145.08 μg/m3
Nitrogen Dioxide: 11.16 μg/m3
Sulphur Dioxide: 2.45 μg/m3
Ozone: 65.2 μg/m3

Astronomical

Sunrise: 7:23 AM
Sun Transit: 12:09 AM
Sunset: 4:56 PM
Daylight: 9 hrs 33 mins
Moonrise: 10:38 AM
Moon Transit: 4:02 PM
Moonset: 9:35 PM
Moon Phase: Waxing Crescent
Moon Illumination: 19.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:32 PM - 6:02 PM

Minor Periods

9:05 PM - 10:35 PM
10:08 AM - 11:38 AM

Action Rating: 2 out of 5

Thursday, December 25, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 54.5°F
Average Humidity: 78%
Chance of Rain: 62%
Wind: 31.1 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 4.59 μg/m3
PM10: 6.16 μg/m3
Carbon Monoxide: 146.49 μg/m3
Nitrogen Dioxide: 7 μg/m3
Sulphur Dioxide: 2.07 μg/m3
Ozone: 81.31 μg/m3

Astronomical

Sunrise: 7:24 AM
Sun Transit: 12:10 AM
Sunset: 4:56 PM
Daylight: 9 hrs 33 mins
Moonrise: 11:03 AM
Moon Transit: 4:46 PM
Moonset: 10:41 PM
Moon Phase: Waxing Crescent
Moon Illumination: 29.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
4:16 PM - 6:46 PM

Minor Periods

10:11 PM - 11:41 PM
10:33 AM - 12:03 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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