Water Temperature of San Francisco Bay in San Rafael, CA

Current Water Temperature

32.0°F

Measurement Time: Monday, July 27, 2026, 9:14 PM PDT

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

56.1°F
Clear
Clear
48.6°F
56.1°F
88%
SW 3.1 mph
6.2 mph
55.8°F
52.5°F
0 in
3%
6 mi
1013 mbar
0

Five Day Weather Forecast

Sunny
Tue
H: 91°F
L: 55°F
Sunny
Wed
H: 70°F
L: 56°F
Sunny
Thu
H: 69°F
L: 56°F
Sunny
Fri
H: 72°F
L: 55°F
Sunny
Sat
H: 72°F
L: 56°F

Air Quality

AQI: 1 - Good
PM2.5: 5.5 μg/m3
PM10: 7.1 μg/m3
Carbon Monoxide: 89 μg/m3
Nitrogen Dioxide: 6.8 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 38 μg/m3

Astronomical

Sunrise: 6:10 AM
Sun Transit: 1:16 PM
Sunset: 8:23 PM
Daylight: 14 hrs 13 mins
Moonrise: 8:13 PM
Moon Transit: 12:17 AM
Moonset: 5:03 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
7:43 AM - 10:13 AM

Minor Periods

7:43 PM - 9:13 PM
4:33 AM - 6:03 AM

Action Rating: 4 out of 5

Small Craft Advisory issued July 27 at 2:36PM PDT until July 28 at 9:00PM PDT by NWS San Francisco CA

Effective: Mon July 27, 2026, 2:36 PM
Expires: Mon July 27, 2026, 10:45 PM

* WHAT...For the first Small Craft Advisory, a moderate chop. For the second Small Craft Advisory, a moderate chop expected. * WHERE...San Pablo Bay, Suisun Bay, the West Delta and the San Francisco Bay north of the Bay Bridge. * WHEN...For the first Small Craft Advisory, until 9 PM PDT this evening. For the second Small Craft Advisory, from 2 PM to 9 PM PDT Tuesday. * 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 27 at 2:36PM PDT until July 27 at 9:00PM PDT by NWS San Francisco CA

Effective: Mon July 27, 2026, 2:36 PM
Expires: Mon July 27, 2026, 10:45 PM

* WHAT...For the first Small Craft Advisory, a moderate chop. For the second Small Craft Advisory, a moderate chop expected. * WHERE...San Pablo Bay, Suisun Bay, the West Delta and the San Francisco Bay north of the Bay Bridge. * WHEN...For the first Small Craft Advisory, until 9 PM PDT this evening. For the second Small Craft Advisory, from 2 PM to 9 PM PDT Tuesday. * 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 27 at 8:35PM PDT until July 27 at 9:00PM PDT by NWS San Francisco CA

Effective: Mon July 27, 2026, 8:35 PM
Expires: Tue July 28, 2026, 4:45 AM

* WHAT...A moderate chop expected. * WHERE...San Pablo Bay, Suisun Bay, the West Delta and the San Francisco Bay north of the Bay Bridge. * WHEN...From 2 PM to 9 PM PDT Tuesday. * 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 27 at 8:35PM PDT until July 28 at 9:00PM PDT by NWS San Francisco CA

Effective: Mon July 27, 2026, 8:35 PM
Expires: Tue July 28, 2026, 4:45 AM

* WHAT...A moderate chop expected. * WHERE...San Pablo Bay, Suisun Bay, the West Delta and the San Francisco Bay north of the Bay Bridge. * WHEN...From 2 PM to 9 PM PDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Tuesday, July 28, 2026

Weather Forecast

Sunny
90.7°F
55.2°F
65.6°F
71%
0 in
6%
0%
11 mph
9.9


Air Quality

AQI: 1 - Good
PM2.5: 6.55 μg/m3
PM10: 9.03 μg/m3
Carbon Monoxide: 98.92 μg/m3
Nitrogen Dioxide: 4.57 μg/m3
Sulphur Dioxide: 0.68 μg/m3
Ozone: 44.17 μg/m3

Astronomical

Sunrise: 6:10 AM
Sun Transit: 1:16 PM
Sunset: 8:23 PM
Daylight: 14 hrs 13 mins
Moonrise: 8:13 PM
Moon Transit: 12:17 AM
Moonset: 5:03 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
7:43 AM - 10:13 AM

Minor Periods

7:43 PM - 9:13 PM
4:33 AM - 6:03 AM

Action Rating: 4 out of 5

Wednesday, July 29, 2026

Weather Forecast

Sunny
70.3°F
56.3°F
62°F
79%
0 in
9%
0%
9.2 mph
9.7


Air Quality

AQI: 1 - Good
PM2.5: 6.78 μg/m3
PM10: 9.28 μg/m3
Carbon Monoxide: 105.13 μg/m3
Nitrogen Dioxide: 6 μg/m3
Sulphur Dioxide: 0.65 μg/m3
Ozone: 35.54 μg/m3

Astronomical

Sunrise: 6:11 AM
Sun Transit: 1:16 PM
Sunset: 8:22 PM
Daylight: 14 hrs 11 mins
Moonrise: 8:44 PM
Moon Transit: 1:06 AM
Moonset: 6:06 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:36 AM - 3:06 AM
8:31 AM - 11:01 AM

Minor Periods

8:14 PM - 9:44 PM
5:36 AM - 7:06 AM

Action Rating: 4 out of 5

Thursday, July 30, 2026

Weather Forecast

Sunny
68.9°F
55.8°F
61.2°F
77%
0 in
8%
0%
9.8 mph
10.2


Air Quality

AQI: 1 - Good
PM2.5: 9.18 μg/m3
PM10: 12.88 μg/m3
Carbon Monoxide: 95.54 μg/m3
Nitrogen Dioxide: 6.41 μg/m3
Sulphur Dioxide: 0.75 μg/m3
Ozone: 47.29 μg/m3

Astronomical

Sunrise: 6:12 AM
Sun Transit: 1:16 PM
Sunset: 8:21 PM
Daylight: 14 hrs 9 mins
Moonrise: 9:10 PM
Moon Transit: 1:52 AM
Moonset: 7:09 AM
Moon Phase: Full
Moon Illumination: 97.1%

Best Times for Fishing or Hunting

Major Periods

1:22 AM - 3:52 AM
9:17 AM - 11:47 AM

Minor Periods

8:40 PM - 10:10 PM
6:39 AM - 8:09 AM

Action Rating: 5 out of 5

Friday, July 31, 2026

Weather Forecast

Sunny
71.5°F
55°F
61.9°F
75%
0 in
7%
0%
9.8 mph
10


Air Quality

AQI: 1 - Good
PM2.5: 10.18 μg/m3
PM10: 13.78 μg/m3
Carbon Monoxide: 107.3 μg/m3
Nitrogen Dioxide: 8.68 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 44.5 μg/m3

Astronomical

Sunrise: 6:12 AM
Sun Transit: 1:16 PM
Sunset: 8:20 PM
Daylight: 14 hrs 7 mins
Moonrise: 9:34 PM
Moon Transit: 2:36 AM
Moonset: 8:12 AM
Moon Phase: Full
Moon Illumination: 92.0%

Best Times for Fishing or Hunting

Major Periods

2:06 AM - 4:36 AM
10:01 AM - 12:31 AM

Minor Periods

9:04 PM - 10:34 PM
7:42 AM - 9:12 AM

Action Rating: 3 out of 5

Saturday, August 1, 2026

Weather Forecast

Sunny
71.5°F
55.6°F
62.5°F
75%
0 in
7%
0%
9.8 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 7.28 μg/m3
PM10: 9.02 μg/m3
Carbon Monoxide: 112.5 μg/m3
Nitrogen Dioxide: 11.07 μg/m3
Sulphur Dioxide: 0.68 μg/m3
Ozone: 23 μg/m3

Astronomical

Sunrise: 6:13 AM
Sun Transit: 1:16 PM
Sunset: 8:19 PM
Daylight: 14 hrs 5 mins
Moonrise: 9:58 PM
Moon Transit: 3:20 AM
Moonset: 9:14 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.9%

Best Times for Fishing or Hunting

Major Periods

2:50 AM - 5:20 AM
10:44 AM - 1:14 PM

Minor Periods

9:28 PM - 10:58 PM
8:44 AM - 10:14 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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