Water Temperature of San Francisco Bay in San Francisco, CA

Current Water Temperature

58.3°F

Measurement Time: Monday, April 20, 2026, 8:00 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

61°F
Moderate rain
Moderate rain
61°F
58.1°F
81%
S 16.3 mph
23.2 mph
55.5°F
52.6°F
0.02 in
100%
6 mi
1013 mbar
1.6

Five Day Weather Forecast

Moderate rain
Mon
H: 70°F
L: 52°F
Moderate rain
Tue
H: 58°F
L: 51°F
Patchy rain nearby
Wed
H: 58°F
L: 52°F
Sunny
Thu
H: 60°F
L: 50°F
Partly Cloudy
Fri
H: 58°F
L: 52°F

Air Quality

AQI: 1 - Good
PM2.5: 4.55 μg/m3
PM10: 6.25 μg/m3
Carbon Monoxide: 172.85 μg/m3
Nitrogen Dioxide: 6.35 μg/m3
Sulphur Dioxide: 2.25 μg/m3
Ozone: 88 μg/m3

Astronomical

Sunrise: 6:28 AM
Sun Transit: 1:08 PM
Sunset: 7:50 PM
Daylight: 13 hrs 23 mins
Moonrise: 8:30 AM
Moon Transit: 4:24 PM
Moonset: 12:11 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:54 PM - 6:24 PM

Minor Periods

8:00 AM - 9:30 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Monday, April 20, 2026

Weather Forecast

Moderate rain
70.2°F
51.6°F
56.6°F
76%
0.21 in
88%
0%
17.4 mph
6.1


Air Quality

AQI: 1 - Good
PM2.5: 9.09 μg/m3
PM10: 14.14 μg/m3
Carbon Monoxide: 166.89 μg/m3
Nitrogen Dioxide: 8.36 μg/m3
Sulphur Dioxide: 2.77 μg/m3
Ozone: 84.52 μg/m3

Astronomical

Sunrise: 6:28 AM
Sun Transit: 1:08 PM
Sunset: 7:50 PM
Daylight: 13 hrs 23 mins
Moonrise: 8:30 AM
Moon Transit: 4:24 PM
Moonset: 12:11 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:54 PM - 6:24 PM

Minor Periods

8:00 AM - 9:30 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Tuesday, April 21, 2026

Weather Forecast

Moderate rain
58.2°F
51.3°F
54.5°F
78%
0.59 in
91%
0%
17.2 mph
4.2


Air Quality

AQI: 1 - Good
PM2.5: 6.54 μg/m3
PM10: 9.59 μg/m3
Carbon Monoxide: 161.21 μg/m3
Nitrogen Dioxide: 5.27 μg/m3
Sulphur Dioxide: 2.07 μg/m3
Ozone: 91.96 μg/m3

Astronomical

Sunrise: 6:26 AM
Sun Transit: 1:08 PM
Sunset: 7:51 PM
Daylight: 13 hrs 25 mins
Moonrise: 9:32 AM
Moon Transit: 5:29 PM
Moonset: 12:23 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
4:59 PM - 7:29 PM

Minor Periods

9:02 AM - 10:32 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, April 22, 2026

Weather Forecast

Patchy rain nearby
58.3°F
51.5°F
54.2°F
74%
0.1 in
87%
0%
14.8 mph
7.1


Air Quality

AQI: 1 - Good
PM2.5: 6.86 μg/m3
PM10: 10.18 μg/m3
Carbon Monoxide: 154.61 μg/m3
Nitrogen Dioxide: 4.62 μg/m3
Sulphur Dioxide: 2.12 μg/m3
Ozone: 96.36 μg/m3

Astronomical

Sunrise: 6:25 AM
Sun Transit: 1:08 PM
Sunset: 7:52 PM
Daylight: 13 hrs 27 mins
Moonrise: 10:42 AM
Moon Transit: 6:31 PM
Moonset: 1:24 AM
Moon Phase: Waxing Crescent
Moon Illumination: 28.4%

Best Times for Fishing or Hunting

Major Periods

1:00 AM - 3:30 AM
6:01 PM - 8:31 PM

Minor Periods

10:12 AM - 11:42 AM
12:54 AM - 2:24 AM

Action Rating: 2 out of 5

Thursday, April 23, 2026

Weather Forecast

Sunny
60.4°F
49.7°F
54.6°F
73%
0 in
0%
0%
13.9 mph
7.8


Air Quality

AQI: 1 - Good
PM2.5: 8.22 μg/m3
PM10: 11.1 μg/m3
Carbon Monoxide: 168.29 μg/m3
Nitrogen Dioxide: 7.75 μg/m3
Sulphur Dioxide: 2.85 μg/m3
Ozone: 82.4 μg/m3

Astronomical

Sunrise: 6:24 AM
Sun Transit: 1:07 PM
Sunset: 7:53 PM
Daylight: 13 hrs 29 mins
Moonrise: 11:55 AM
Moon Transit: 7:28 PM
Moonset: 2:13 AM
Moon Phase: First Quarter
Moon Illumination: 39.1%

Best Times for Fishing or Hunting

Major Periods

2:01 AM - 4:31 AM
6:58 PM - 9:28 PM

Minor Periods

11:25 AM - 12:55 AM
1:43 AM - 3:13 AM

Action Rating: 2 out of 5

Friday, April 24, 2026

Weather Forecast

Partly Cloudy
57.7°F
51.6°F
54.5°F
76%
0 in
0%
0%
14.3 mph
6.5


Air Quality

AQI: 1 - Good
PM2.5: 10.05 μg/m3
PM10: 13.96 μg/m3
Carbon Monoxide: 167.27 μg/m3
Nitrogen Dioxide: 10.55 μg/m3
Sulphur Dioxide: 2.41 μg/m3
Ozone: 75.62 μg/m3

Astronomical

Sunrise: 6:22 AM
Sun Transit: 1:07 PM
Sunset: 7:54 PM
Daylight: 13 hrs 32 mins
Moonrise: 1:06 PM
Moon Transit: 8:20 PM
Moonset: 2:52 AM
Moon Phase: First Quarter
Moon Illumination: 50.4%

Best Times for Fishing or Hunting

Major Periods

2:56 AM - 5:26 AM
7:50 PM - 10:20 PM

Minor Periods

12:36 AM - 2:06 PM
2:22 AM - 3:52 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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