Water Temperature of San Francisco Bay in San Rafael, CA

Current Water Temperature

55.2°F

Measurement Time: Sunday, January 18, 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
42.5°F
52°F
93%
NNE 6.7 mph
13.2 mph
49.8°F
41.7°F
0 in
75%
9 mi
1022 mbar
0.2

Five Day Weather Forecast

Sunny
Sun
H: 60°F
L: 52°F
Sunny
Mon
H: 60°F
L: 52°F
Overcast
Tue
H: 60°F
L: 51°F
Overcast
Wed
H: 57°F
L: 54°F
Patchy rain nearby
Thu
H: 56°F
L: 52°F

Air Quality

Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:23 AM
Sun Transit: 12:20 AM
Sunset: 5:18 PM
Daylight: 9 hrs 55 mins
Moonrise: 7:38 AM
Moon Transit: 12:24 AM
Moonset: 5:16 PM
Moon Phase: New
Moon Illumination: 2.5%

Best Times for Fishing or Hunting

Major Periods

7:50 PM - 10:20 PM
11:54 AM - 2:24 PM

Minor Periods

4:46 PM - 6:16 PM
7:08 AM - 8:38 AM

Action Rating: 4 out of 5

Dense Fog Advisory issued January 17 at 5:54PM PST until January 18 at 12:00PM PST by NWS Sacramento CA

Effective: Sat January 17, 2026, 5:54 PM
Expires: Sun January 18, 2026, 12:00 PM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Carquinez Strait and Delta, Central and Southern Sacramento Valley, and Northern San Joaquin Valley. * WHEN...Until noon PST Sunday. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Sunday, January 18, 2026

Weather Forecast

Sunny
60.1°F
51.8°F
55.4°F
64%
0 in
0%
0%
6.9 mph
0.5


Air Quality

AQI: 2 - Moderate
PM2.5: 25.82 μg/m3
PM10: 26.82 μg/m3
Carbon Monoxide: 514.6 μg/m3
Nitrogen Dioxide: 40.69 μg/m3
Sulphur Dioxide: 5.2 μg/m3
Ozone: 6.08 μg/m3

Astronomical

Sunrise: 7:23 AM
Sun Transit: 12:20 AM
Sunset: 5:18 PM
Daylight: 9 hrs 55 mins
Moonrise: 7:38 AM
Moon Transit: 12:24 AM
Moonset: 5:16 PM
Moon Phase: New
Moon Illumination: 2.5%

Best Times for Fishing or Hunting

Major Periods

7:50 PM - 10:20 PM
11:54 AM - 2:24 PM

Minor Periods

4:46 PM - 6:16 PM
7:08 AM - 8:38 AM

Action Rating: 4 out of 5

Monday, January 19, 2026

Weather Forecast

Sunny
60.4°F
51.7°F
54.9°F
65%
0 in
0%
0%
6.5 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: 7:22 AM
Sun Transit: 12:20 AM
Sunset: 5:19 PM
Daylight: 9 hrs 56 mins
Moonrise: 8:12 AM
Moon Transit: 1:13 PM
Moonset: 6:23 PM
Moon Phase: New
Moon Illumination: 0.4%

Best Times for Fishing or Hunting

Major Periods

8:39 PM - 11:09 PM
12:43 AM - 3:13 PM

Minor Periods

5:53 PM - 7:23 PM
7:42 AM - 9:12 AM

Action Rating: 4 out of 5

Tuesday, January 20, 2026

Weather Forecast

Overcast
59.5°F
51.3°F
55°F
68%
0 in
0%
0%
6.5 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: 7:22 AM
Sun Transit: 12:20 AM
Sunset: 5:20 PM
Daylight: 9 hrs 58 mins
Moonrise: 8:41 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

9:25 PM - 11:55 PM
1:30 PM - 4:00 PM

Minor Periods

6:58 PM - 8:28 PM
8:11 AM - 9:41 AM

Action Rating: 3 out of 5

Wednesday, January 21, 2026

Weather Forecast

Overcast
57°F
53.6°F
55°F
79%
0 in
0%
0%
4.3 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: 7:21 AM
Sun Transit: 12:21 AM
Sunset: 5:21 PM
Daylight: 9 hrs 59 mins
Moonrise: 9:07 AM
Moon Transit: 2:45 PM
Moonset: 8:34 PM
Moon Phase: Waxing Crescent
Moon Illumination: 8.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:15 PM - 4:45 PM

Minor Periods

8:04 PM - 9:34 PM
8:37 AM - 10:07 AM

Action Rating: 2 out of 5

Thursday, January 22, 2026

Weather Forecast

Patchy rain nearby
55.7°F
51.9°F
53.7°F
84%
0.01 in
89%
0%
4.9 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: 7:21 AM
Sun Transit: 12:21 AM
Sunset: 5:22 PM
Daylight: 10 hrs 1 mins
Moonrise: 9:31 AM
Moon Transit: 3:30 PM
Moonset: 9:39 PM
Moon Phase: Waxing Crescent
Moon Illumination: 15.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:00 PM - 5:30 PM

Minor Periods

9:09 PM - 10:39 PM
9:01 AM - 10:31 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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