Water Temperature of San Francisco Bay in San Francisco, CA

Current Water Temperature

64.2°F

Measurement Time: Wednesday, July 15, 2026, 2:00 AM PDT

Temperature Locations

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Local Points of Interest

Alcatraz Island

San Francisco Bay

Station Name: SAN FRANCISCO BAY A NE SHORE ALCATRAZ ISLAND CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 0 feet

Nearest Address:
Alcatraz Island
San Francisco, CA 94133-1312
San Francisco County

GPS Coordinates: 37.8272222, -122.4216667

Nearby Water Temperatures

San Francisco Bay, San Francisco, CA (2.1 mi)
San Francisco Bay, San Francisco, CA (2.8 mi)
Rodeo Pond, Sausalito, CA (5.6 mi)
Rodeo Lagoon, Sausalito, CA (5.8 mi)
Rodeo Lagoon, Sausalito, CA (6.1 mi)
San Francisco Bay, Richmond, CA (7.1 mi)
San Francisco Bay, San Rafael, CA (7.6 mi)
San Francisco Bay, Alameda, CA (7.7 mi)
San Francisco Bay, San Mateo, CA (16.7 mi)
Carquinez Strait, Martinez, CA (21.6 mi)
Pacific Ocean, San Francisco, CA (23.3 mi)
Redwood Creek, Redwood City, CA (25 mi)
Suisun Bay, Concord, CA (26.1 mi)
San Francisco Bay, Menlo Park, CA (27.7 mi)
Drakes Bay, Inverness, CA (32.2 mi)

Weather for San Francisco, California

Current Weather

64.9°F
Sunny
Sunny
64.9°F
69.3°F
70%
WSW 5.8 mph
7.7 mph
69.3°F
53.3°F
0 in
25%
9 mi
1015 mbar
4.8

Five Day Weather Forecast

Sunny
Wed
H: 80°F
L: 57°F
Sunny
Thu
H: 65°F
L: 56°F
Sunny
Fri
H: 63°F
L: 55°F
Sunny
Sat
H: 64°F
L: 56°F
Sunny
Sun
H: 65°F
L: 55°F

Air Quality

AQI: 1 - Good
PM2.5: 11.1 μg/m3
PM10: 16.9 μg/m3
Carbon Monoxide: 99 μg/m3
Nitrogen Dioxide: 5.9 μg/m3
Sulphur Dioxide: 0.9 μg/m3
Ozone: 49 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:15 PM
Sunset: 8:32 PM
Daylight: 14 hrs 32 mins
Moonrise: 7:23 AM
Moon Transit: 2:42 PM
Moonset: 9:50 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:12 PM - 4:42 PM

Minor Periods

9:20 PM - 10:50 PM
6:53 AM - 8:23 AM

Action Rating: 3 out of 5

Small Craft Advisory issued July 15 at 2:24AM PDT until July 15 at 9:00PM PDT by NWS San Francisco CA

Effective: Wed July 15, 2026, 2:24 AM
Expires: Wed July 15, 2026, 10:30 AM

* WHAT...Southwest winds 10 to 20 kt and 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 3 PM this afternoon to 9 PM PDT this evening. * 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 15 at 8:34AM PDT until July 15 at 9:00PM PDT by NWS San Francisco CA

Effective: Wed July 15, 2026, 8:34 AM
Expires: Wed July 15, 2026, 4:45 PM

* WHAT...Southwest winds 10 to 15 kt with gusts to 25 kt and 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 3 PM this afternoon to 9 PM PDT this evening. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.


Wednesday, July 15, 2026

Weather Forecast

Sunny
79.5°F
57°F
67°F
61%
0 in
4%
0%
13 mph
9.9


Air Quality

AQI: 1 - Good
PM2.5: 11.17 μg/m3
PM10: 16.31 μg/m3
Carbon Monoxide: 100.21 μg/m3
Nitrogen Dioxide: 9.42 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 48.38 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:15 PM
Sunset: 8:32 PM
Daylight: 14 hrs 32 mins
Moonrise: 7:23 AM
Moon Transit: 2:42 PM
Moonset: 9:50 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:12 PM - 4:42 PM

Minor Periods

9:20 PM - 10:50 PM
6:53 AM - 8:23 AM

Action Rating: 3 out of 5

Thursday, July 16, 2026

Weather Forecast

Sunny
65.2°F
56.3°F
60.1°F
75%
0 in
7%
0%
14.5 mph
9.9


Air Quality

AQI: 1 - Good
PM2.5: 10.79 μg/m3
PM10: 15.78 μg/m3
Carbon Monoxide: 95.13 μg/m3
Nitrogen Dioxide: 5.4 μg/m3
Sulphur Dioxide: 0.73 μg/m3
Ozone: 55.92 μg/m3

Astronomical

Sunrise: 6:01 AM
Sun Transit: 1:15 PM
Sunset: 8:31 PM
Daylight: 14 hrs 30 mins
Moonrise: 8:39 AM
Moon Transit: 3:35 PM
Moonset: 10:21 PM
Moon Phase: New
Moon Illumination: 2.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:05 PM - 5:35 PM

Minor Periods

9:51 PM - 11:21 PM
8:09 AM - 9:39 AM

Action Rating: 3 out of 5

Friday, July 17, 2026

Weather Forecast

Sunny
62.6°F
55.4°F
58.4°F
81%
0 in
13%
0%
14.1 mph
9.5


Air Quality

AQI: 1 - Good
PM2.5: 13.14 μg/m3
PM10: 19.22 μg/m3
Carbon Monoxide: 94.04 μg/m3
Nitrogen Dioxide: 3.82 μg/m3
Sulphur Dioxide: 0.81 μg/m3
Ozone: 61.96 μg/m3

Astronomical

Sunrise: 6:01 AM
Sun Transit: 1:15 PM
Sunset: 8:30 PM
Daylight: 14 hrs 29 mins
Moonrise: 9:50 AM
Moon Transit: 4:23 PM
Moonset: 10:47 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:53 PM - 6:23 PM

Minor Periods

10:17 PM - 11:47 PM
9:20 AM - 10:50 AM

Action Rating: 2 out of 5

Saturday, July 18, 2026

Weather Forecast

Sunny
64°F
55.7°F
59.1°F
79%
0 in
17%
0%
13.6 mph
10.2


Air Quality

AQI: 1 - Good
PM2.5: 9.86 μg/m3
PM10: 14.74 μg/m3
Carbon Monoxide: 94.05 μg/m3
Nitrogen Dioxide: 5.31 μg/m3
Sulphur Dioxide: 0.89 μg/m3
Ozone: 54.33 μg/m3

Astronomical

Sunrise: 6:02 AM
Sun Transit: 1:16 PM
Sunset: 8:30 PM
Daylight: 14 hrs 28 mins
Moonrise: 10:57 AM
Moon Transit: 5:08 PM
Moonset: 11:10 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
4:38 PM - 7:08 PM

Minor Periods

12:00 AM - 12:00 AM
10:27 AM - 11:57 AM

Action Rating: 2 out of 5

Sunday, July 19, 2026

Weather Forecast

Sunny
64.5°F
55.2°F
59°F
80%
0 in
13%
0%
13 mph
5


Air Quality

AQI: 1 - Good
PM2.5: 7.1 μg/m3
PM10: 10.7 μg/m3
Carbon Monoxide: 100.83 μg/m3
Nitrogen Dioxide: 4.6 μg/m3
Sulphur Dioxide: 0.77 μg/m3
Ozone: 59 μg/m3

Astronomical

Sunrise: 6:03 AM
Sun Transit: 1:16 PM
Sunset: 8:29 PM
Daylight: 14 hrs 26 mins
Moonrise: 12:02 AM
Moon Transit: 5:52 PM
Moonset: 12:10 AM
Moon Phase: Waxing Crescent
Moon Illumination: 22.6%

Best Times for Fishing or Hunting

Major Periods

12:33 AM - 3:03 AM
5:22 PM - 7:52 PM

Minor Periods

11:32 AM - 1:02 PM
12:00 AM - 12:00 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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