Water Temperature of San Francisco Bay in San Francisco, CA

Current Water Temperature

62.4°F

Measurement Time: Sunday, August 2, 2026, 5:00 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

76.1°F
Sunny
Sunny
73.4°F
78°F
52%
W 8.9 mph
14.1 mph
76.1°F
57.1°F
0 in
0%
6 mi
1011 mbar
9

Five Day Weather Forecast

Sunny
Sun
H: 84°F
L: 54°F
Sunny
Mon
H: 70°F
L: 54°F
Sunny
Tue
H: 70°F
L: 58°F
Sunny
Wed
H: 69°F
L: 58°F
Sunny
Thu
H: 69°F
L: 58°F

Air Quality

AQI: 1 - Good
PM2.5: 11.2 μg/m3
PM10: 16.5 μg/m3
Carbon Monoxide: 91 μg/m3
Nitrogen Dioxide: 5.4 μg/m3
Sulphur Dioxide: 0.9 μg/m3
Ozone: 50 μg/m3

Astronomical

Sunrise: 6:14 AM
Sun Transit: 1:15 PM
Sunset: 8:17 PM
Daylight: 14 hrs 3 mins
Moonrise: 10:21 PM
Moon Transit: 3:50 PM
Moonset: 10:18 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

11:27 AM - 1:57 PM
3:20 PM - 5:50 PM

Minor Periods

9:51 PM - 11:21 PM
9:48 AM - 11:18 AM

Action Rating: 2 out of 5

Gale Warning issued August 2 at 2:35AM PDT until August 3 at 3:00AM PDT by NWS San Francisco CA

Effective: Sun August 2, 2026, 2:35 AM
Expires: Sun August 2, 2026, 10:45 AM

* WHAT...Northwest winds 20 to 30 kt with gusts up to 40 kt and seas 10 to 14 ft. * WHERE...Waters from Point Reyes to Pigeon Point 10-60 NM. * WHEN...Until 3 AM PDT Monday. * IMPACTS...Strong winds will cause hazardous seas which could capsize or damage vessels and reduce visibility.

Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions.


Gale Warning issued August 2 at 2:35AM PDT until August 2 at 9:00PM PDT by NWS San Francisco CA

Effective: Sun August 2, 2026, 2:35 AM
Expires: Sun August 2, 2026, 10:45 AM

* WHAT...Northwest winds 20 to 30 kt with gusts up to 35 kt and seas 8 to 11 ft. * WHERE...Coastal Waters from Point Arena to Point Reyes California out to 10 NM. * WHEN...Until 9 PM PDT this evening. * IMPACTS...Strong winds will cause hazardous seas which could capsize or damage vessels and reduce visibility.

Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions.
Sunday, August 2, 2026

Weather Forecast

Sunny
84°F
54.1°F
67.2°F
67%
0 in
5%
0%
10.3 mph
9.5


Air Quality

AQI: 1 - Good
PM2.5: 10.09 μg/m3
PM10: 15.43 μg/m3
Carbon Monoxide: 94.5 μg/m3
Nitrogen Dioxide: 8.88 μg/m3
Sulphur Dioxide: 0.69 μg/m3
Ozone: 39.46 μg/m3

Astronomical

Sunrise: 6:14 AM
Sun Transit: 1:15 PM
Sunset: 8:17 PM
Daylight: 14 hrs 3 mins
Moonrise: 10:21 PM
Moon Transit: 3:50 PM
Moonset: 10:18 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

11:27 AM - 1:57 PM
3:20 PM - 5:50 PM

Minor Periods

9:51 PM - 11:21 PM
9:48 AM - 11:18 AM

Action Rating: 2 out of 5

Monday, August 3, 2026

Weather Forecast

Sunny
70.2°F
54.3°F
62.2°F
73%
0 in
8%
0%
11.6 mph
9.5


Air Quality

AQI: 1 - Good
PM2.5: 11.86 μg/m3
PM10: 17.94 μg/m3
Carbon Monoxide: 94.83 μg/m3
Nitrogen Dioxide: 9.66 μg/m3
Sulphur Dioxide: 0.92 μg/m3
Ozone: 43.67 μg/m3

Astronomical

Sunrise: 6:15 AM
Sun Transit: 1:15 PM
Sunset: 8:16 PM
Daylight: 14 hrs 1 mins
Moonrise: 10:46 PM
Moon Transit: 12:00 AM
Moonset: 11:23 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

10:16 PM - 11:46 PM
10:53 AM - 12:23 AM

Action Rating: 2 out of 5

Tuesday, August 4, 2026

Weather Forecast

Sunny
69.5°F
57.6°F
62.6°F
78%
0 in
8%
0%
13.2 mph
9.7


Air Quality

AQI: 1 - Good
PM2.5: 13.23 μg/m3
PM10: 19.14 μg/m3
Carbon Monoxide: 95.21 μg/m3
Nitrogen Dioxide: 8.47 μg/m3
Sulphur Dioxide: 1.13 μg/m3
Ozone: 60.54 μg/m3

Astronomical

Sunrise: 6:16 AM
Sun Transit: 1:15 PM
Sunset: 8:15 PM
Daylight: 13 hrs 59 mins
Moonrise: 11:14 PM
Moon Transit: 5:32 AM
Moonset: 12:30 AM
Moon Phase: Last Quarter
Moon Illumination: 54.6%

Best Times for Fishing or Hunting

Major Periods

5:02 AM - 7:32 AM
12:58 AM - 3:28 PM

Minor Periods

12:00 AM - 12:00 AM
12:00 AM - 1:30 PM

Action Rating: 2 out of 5

Wednesday, August 5, 2026

Weather Forecast

Sunny
69°F
58.1°F
62.3°F
80%
0 in
10%
0%
13.2 mph
9.2


Air Quality

AQI: 1 - Good
PM2.5: 10.73 μg/m3
PM10: 14.62 μg/m3
Carbon Monoxide: 112.56 μg/m3
Nitrogen Dioxide: 6.87 μg/m3
Sulphur Dioxide: 1.29 μg/m3
Ozone: 72.83 μg/m3

Astronomical

Sunrise: 6:17 AM
Sun Transit: 1:15 PM
Sunset: 8:14 PM
Daylight: 13 hrs 57 mins
Moonrise: 12:14 AM
Moon Transit: 6:21 AM
Moonset: 1:41 PM
Moon Phase: Last Quarter
Moon Illumination: 43.2%

Best Times for Fishing or Hunting

Major Periods

5:51 AM - 8:21 AM
1:49 PM - 4:19 PM

Minor Periods

1:11 PM - 2:41 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Thursday, August 6, 2026

Weather Forecast

Sunny
68.9°F
58.4°F
62.6°F
80%
0 in
9%
0%
12.3 mph
9.6


Air Quality

AQI: 1 - Good
PM2.5: 9.47 μg/m3
PM10: 11.93 μg/m3
Carbon Monoxide: 150 μg/m3
Nitrogen Dioxide: 15.95 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 54.17 μg/m3

Astronomical

Sunrise: 6:18 AM
Sun Transit: 1:15 PM
Sunset: 8:13 PM
Daylight: 13 hrs 55 mins
Moonrise: 12:48 AM
Moon Transit: 7:15 AM
Moonset: 2:54 PM
Moon Phase: Last Quarter
Moon Illumination: 32.3%

Best Times for Fishing or Hunting

Major Periods

6:45 AM - 9:15 AM
2:44 PM - 5:14 PM

Minor Periods

2:24 PM - 3:54 PM
12:00 AM - 12:00 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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