Water Temperature of San Francisco Bay in San Rafael, CA

Current Water Temperature

54.1°F

Measurement Time: Thursday, January 8, 2026, 12:00 AM PST

Temperature Locations

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Local Points of Interest

Richmond, CA

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

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 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 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

46°F
Partly cloudy
Partly cloudy
40.4°F
47.7°F
68%
NW 12.1 mph
18.4 mph
41.1°F
36.6°F
0 in
50%
9 mi
1024 mbar
0.1

Five Day Weather Forecast

Sunny
Thu
H: 58°F
L: 48°F
Sunny
Fri
H: 52°F
L: 41°F
Partly Cloudy
Sat
H: 54°F
L: 39°F
Partly Cloudy
Sun
H: 55°F
L: 47°F
Sunny
Mon
H: 58°F
L: 49°F

Air Quality

AQI: 2 - Moderate
PM2.5: 3.25 μg/m3
PM10: 7.95 μg/m3
Carbon Monoxide: 155.85 μg/m3
Nitrogen Dioxide: 3.35 μg/m3
Sulphur Dioxide: 2.15 μg/m3
Ozone: 76 μg/m3

Astronomical

Sunrise: 7:26 AM
Sun Transit: 12:16 AM
Sunset: 5:07 PM
Daylight: 9 hrs 42 mins
Moonrise: 11:16 PM
Moon Transit: 4:33 AM
Moonset: 10:42 AM
Moon Phase: Waning Gibbous
Moon Illumination: 68.7%

Best Times for Fishing or Hunting

Major Periods

4:03 AM - 6:33 AM
11:57 AM - 2:27 PM

Minor Periods

12:00 AM - 12:00 AM
10:12 AM - 11:42 AM

Action Rating: 2 out of 5

High Surf Advisory issued January 7 at 2:51PM PST until January 9 at 10:00PM PST by NWS San Francisco CA

Effective: Wed January 7, 2026, 2:51 PM
Expires: Thu January 8, 2026, 4:00 AM

* WHAT...Large breaking waves up to 22 feet, strong rip currents and sneaker waves. * WHERE...Pacific Coast from Sonoma county to Monterey county, excluding Northern Monterey Bay. * WHEN...From 1 AM Thursday to 10 PM PST Friday. * IMPACTS...There is an increased risk for sneaker waves, strong rip currents, and beach erosion. Large breaking waves can overpower swimmers resulting in significant physical injury and increase the risk of drowning.

Swimmers should remain out of the water due to dangerous surf conditions.


High Surf Advisory issued January 8 at 3:27AM PST until January 9 at 10:00PM PST by NWS San Francisco CA

Effective: Thu January 8, 2026, 3:27 AM
Expires: Fri January 9, 2026, 10:00 PM

* WHAT...Large breaking waves up to 22 feet, strong rip currents and sneaker waves. * WHERE...Pacific Coast from Sonoma County to Monterey County, excluding Northern Monterey Bay. * WHEN...From 1 AM Thursday to 10 PM PST Friday. * IMPACTS...There is an increased risk for sneaker waves, strong rip currents, and beach erosion. Large breaking waves can overpower swimmers resulting in significant physical injury and increase the risk of drowning.

Swimmers should remain out of the water due to dangerous surf conditions.


Extreme Cold Watch issued January 7 at 7:34PM PST until January 9 at 9:00AM PST by NWS San Francisco CA

Effective: Wed January 7, 2026, 7:34 PM
Expires: Thu January 8, 2026, 5:00 AM

* WHAT...Very cold conditions with temperatures in the low to mid 30s possible except for Interior Monterey and San Benito Counties where temperatures in the upper 20s are possible. * WHERE...The East Bay and San Francisco Bay Shoreline, The Central Coast, The Santa Clara Valley and Eastern Hills, The Salinas and Carmel Valleys and Hollister Area, The Marin Hills, The Santa Cruz Mountains, and North Bay Interior Valleys. * WHEN...From late Thursday night through Friday morning. * IMPACTS...Cold conditions will be hazardous to sensitive populations such as unhoused individuals. Cold conditions may damage or kill sensitive crops, plants, and vegetation if appropriate precautions are not taken. Prolonged exposure to the cold conditions will lead to hypothermia for people, pets, and livestock.

Ensure portable heaters are working properly and are used correctly to avoid sparking a fire indoors. Do not use generators or grills inside as carbon monoxide poisoning can result. Check with your local, city, or county officials for information on available warming centers. Be sure to dress in layers if outdoors. Make sure that pets and livestock have adequate food, unfrozen water, and warmth. Cover or tend to sensitive crops, plants, and vegetation.


Cold Weather Advisory issued January 7 at 11:54PM PST until January 9 at 9:00AM PST by NWS San Francisco CA

Effective: Wed January 7, 2026, 11:54 PM
Expires: Thu January 8, 2026, 3:00 PM

* WHAT...Cold conditions with temperatures in the low to mid 30s expected. * WHERE...The East Bay Hills and Valleys, Monterey Bay and the Big Sur Coast, The Marin Hills, The Santa Cruz Mountains, The Santa Clara Valley, North Bay Interior Valleys, and Northern Salinas Valley/Hollister Valley and Carmel Valley. * WHEN...From 1 AM to 9 AM PST Friday. * IMPACTS...Cold conditions will be hazardous to sensitive populations such as unhoused individuals. Prolonged exposure to the cold conditions will lead to hypothermia for people, pets, and livestock. Cold conditions may damage or kill sensitive crops, plants, and vegetation if appropriate precautions are not taken.

Ensure portable heaters are working properly and are used correctly to avoid sparking a fire indoors. Do not use generators or grills inside as carbon monoxide poisoning can result. Check with your local, city, or county officials for information on available warming centers. Be sure to dress in layers if outdoors. Make sure that pets and livestock have adequate food, unfrozen water, and warmth. Cover or tend to sensitive crops, plants, and vegetation.


Thursday, January 8, 2026

Weather Forecast

Sunny
58.1°F
47.5°F
51.7°F
60%
0 in
0%
0%
17.4 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 4.45 μg/m3
PM10: 8.61 μg/m3
Carbon Monoxide: 149.65 μg/m3
Nitrogen Dioxide: 5.96 μg/m3
Sulphur Dioxide: 2.1 μg/m3
Ozone: 70.28 μg/m3

Astronomical

Sunrise: 7:26 AM
Sun Transit: 12:16 AM
Sunset: 5:07 PM
Daylight: 9 hrs 42 mins
Moonrise: 11:16 PM
Moon Transit: 4:33 AM
Moonset: 10:42 AM
Moon Phase: Waning Gibbous
Moon Illumination: 68.7%

Best Times for Fishing or Hunting

Major Periods

4:03 AM - 6:33 AM
11:57 AM - 2:27 PM

Minor Periods

12:00 AM - 12:00 AM
10:12 AM - 11:42 AM

Action Rating: 2 out of 5

Friday, January 9, 2026

Weather Forecast

Sunny
52°F
41.2°F
46.3°F
62%
0 in
0%
0%
10.3 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 5.92 μg/m3
PM10: 10.49 μg/m3
Carbon Monoxide: 197.49 μg/m3
Nitrogen Dioxide: 15.89 μg/m3
Sulphur Dioxide: 2.79 μg/m3
Ozone: 45.64 μg/m3

Astronomical

Sunrise: 7:26 AM
Sun Transit: 12:17 AM
Sunset: 5:08 PM
Daylight: 9 hrs 43 mins
Moonrise: 12:16 AM
Moon Transit: 5:14 AM
Moonset: 11:04 AM
Moon Phase: Waning Gibbous
Moon Illumination: 57.8%

Best Times for Fishing or Hunting

Major Periods

4:44 AM - 7:14 AM
12:38 AM - 3:08 PM

Minor Periods

10:34 AM - 12:04 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Saturday, January 10, 2026

Weather Forecast

Partly Cloudy
53.5°F
39.2°F
45.7°F
81%
0 in
0%
0%
9.4 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 15.2 μg/m3
PM10: 17.78 μg/m3
Carbon Monoxide: 271.41 μg/m3
Nitrogen Dioxide: 30.61 μg/m3
Sulphur Dioxide: 4.65 μg/m3
Ozone: 16 μg/m3

Astronomical

Sunrise: 7:25 AM
Sun Transit: 12:17 AM
Sunset: 5:09 PM
Daylight: 9 hrs 44 mins
Moonrise: 12:17 AM
Moon Transit: 5:56 AM
Moonset: 11:27 AM
Moon Phase: Last Quarter
Moon Illumination: 46.5%

Best Times for Fishing or Hunting

Major Periods

5:26 AM - 7:56 AM
1:19 PM - 3:49 PM

Minor Periods

10:57 AM - 12:27 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Sunday, January 11, 2026

Weather Forecast

Partly Cloudy
54.8°F
46.8°F
50.4°F
62%
0 in
0%
0%
8.1 mph
0.4


Air Quality

AQI: 2 - Moderate
PM2.5: 16.99 μg/m3
PM10: 18.42 μg/m3
Carbon Monoxide: 265.42 μg/m3
Nitrogen Dioxide: 30.85 μg/m3
Sulphur Dioxide: 4.43 μg/m3
Ozone: 14.8 μg/m3

Astronomical

Sunrise: 7:25 AM
Sun Transit: 12:17 AM
Sunset: 5:10 PM
Daylight: 9 hrs 45 mins
Moonrise: 1:17 AM
Moon Transit: 6:38 AM
Moonset: 11:52 AM
Moon Phase: Last Quarter
Moon Illumination: 35.3%

Best Times for Fishing or Hunting

Major Periods

6:08 AM - 8:38 AM
2:02 PM - 4:32 PM

Minor Periods

11:22 AM - 12:52 AM
12:47 AM - 2:17 AM

Action Rating: 2 out of 5

Monday, January 12, 2026

Weather Forecast

Sunny
57.8°F
48.5°F
52.1°F
63%
0 in
0%
0%
9.8 mph
0


Air Quality

AQI: 2 - Moderate
PM2.5: 24.21 μg/m3
PM10: 25.96 μg/m3
Carbon Monoxide: 540.73 μg/m3
Nitrogen Dioxide: 43.18 μg/m3
Sulphur Dioxide: 5.5 μg/m3
Ozone: 7.38 μg/m3

Astronomical

Sunrise: 7:25 AM
Sun Transit: 12:18 AM
Sunset: 5:11 PM
Daylight: 9 hrs 46 mins
Moonrise: 2:18 AM
Moon Transit: 7:21 AM
Moonset: 12:20 AM
Moon Phase: Last Quarter
Moon Illumination: 25.0%

Best Times for Fishing or Hunting

Major Periods

6:51 AM - 9:21 AM
2:46 PM - 5:16 PM

Minor Periods

11:50 AM - 1:20 PM
1:48 AM - 3:18 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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