Water Temperature of San Francisco Bay in San Francisco, CA

Current Water Temperature

64.9°F

Measurement Time: Friday, September 12, 2025, 12:00 AM PDT

Temperature Locations

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Local Points of Interest

Alcatraz Island

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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 / 0 meters

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 (25.0 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

63°F
Partly cloudy
Conditions: Partly cloudy
Humidity: 84%
Feels Like: 63°F
Wind: S 4.7 mph
Wind Gusts: 6.6 mph
Pressure: 29.98 in
Precipitation: 0 in
Cloud Cover: 75%
Visibility: 9 mi
UV Index: 0.3

Five Day Weather Forecast

Fog
Fri
H: 62°F
L: 58°F
Fog
Sat
H: 61°F
L: 57°F
Mist
Sun
H: 61°F
L: 58°F
Sunny
Mon
H: 73°F
L: 59°F
Sunny
Tue
H: 72°F
L: 60°F

Air Quality

AQI: 2 - Moderate
PM2.5: 21.83 μg/m3
PM10: 28.68 μg/m3
Carbon Monoxide: 253.45 μg/m3
Nitrogen Dioxide: 8.33 μg/m3
Sulphur Dioxide: 4.26 μg/m3
Ozone: 63 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 1:05 PM
Sunset: 7:21 PM
Daylight: 12 hrs 32 mins
Moonrise: 10:18 PM
Moon Transit: 5:05 AM
Moonset: 12:47 AM
Moon Phase: Waning Gibbous
Moon Illumination: 67.4%

Best Times for Fishing or Hunting

Major Periods

4:35 AM - 7:05 AM
12:34 AM - 3:04 PM

Minor Periods

9:48 PM - 11:18 PM
12:17 AM - 1:47 PM

Action Rating: 3 out of 5

Friday, September 12, 2025

Weather Forecast

Conditions: Fog
Average Temperature: 59.7°F
Average Humidity: 95%
Chance of Rain: 0%
Wind: 12.5 mph
UV Index: 1.5

Air Quality

AQI: 2 - Moderate
PM2.5: 20.39 μg/m3
PM10: 27.54 μg/m3
Carbon Monoxide: 271.06 μg/m3
Nitrogen Dioxide: 15.6 μg/m3
Sulphur Dioxide: 4.03 μg/m3
Ozone: 57.28 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 1:05 PM
Sunset: 7:21 PM
Daylight: 12 hrs 32 mins
Moonrise: 10:18 PM
Moon Transit: 5:05 AM
Moonset: 12:47 AM
Moon Phase: Waning Gibbous
Moon Illumination: 67.4%

Best Times for Fishing or Hunting

Major Periods

4:35 AM - 7:05 AM
12:34 AM - 3:04 PM

Minor Periods

9:48 PM - 11:18 PM
12:17 AM - 1:47 PM

Action Rating: 3 out of 5

Saturday, September 13, 2025

Weather Forecast

Conditions: Fog
Average Temperature: 58.7°F
Average Humidity: 95%
Chance of Rain: 0%
Wind: 14.8 mph
UV Index: 1.6

Air Quality

AQI: 2 - Moderate
PM2.5: 21.88 μg/m3
PM10: 30.47 μg/m3
Carbon Monoxide: 234.28 μg/m3
Nitrogen Dioxide: 12.48 μg/m3
Sulphur Dioxide: 3.14 μg/m3
Ozone: 51.72 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 1:05 PM
Sunset: 7:20 PM
Daylight: 12 hrs 29 mins
Moonrise: 11:09 PM
Moon Transit: 6:05 AM
Moonset: 2:00 PM
Moon Phase: Waning Gibbous
Moon Illumination: 56.4%

Best Times for Fishing or Hunting

Major Periods

5:35 AM - 8:05 AM
1:35 PM - 4:05 PM

Minor Periods

12:00 AM - 12:00 AM
1:30 PM - 3:00 PM

Action Rating: 2 out of 5

Sunday, September 14, 2025

Weather Forecast

Conditions: Mist
Average Temperature: 59.3°F
Average Humidity: 94%
Chance of Rain: 0%
Wind: 13.4 mph
UV Index: 1.7

Air Quality

AQI: 2 - Moderate
PM2.5: 17.9 μg/m3
PM10: 25.12 μg/m3
Carbon Monoxide: 225.77 μg/m3
Nitrogen Dioxide: 11.91 μg/m3
Sulphur Dioxide: 2.71 μg/m3
Ozone: 47.52 μg/m3

Astronomical

Sunrise: 6:51 AM
Sun Transit: 1:05 PM
Sunset: 7:18 PM
Daylight: 12 hrs 27 mins
Moonrise: 12:09 AM
Moon Transit: 7:07 AM
Moonset: 3:06 PM
Moon Phase: Last Quarter
Moon Illumination: 45.1%

Best Times for Fishing or Hunting

Major Periods

6:37 AM - 9:07 AM
2:37 PM - 5:07 PM

Minor Periods

2:36 PM - 4:06 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Monday, September 15, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 64.4°F
Average Humidity: 74%
Chance of Rain: 0%
Wind: 10.3 mph
UV Index: 0

Air Quality

AQI: 2 - Moderate
PM2.5: 16.99 μg/m3
PM10: 22.58 μg/m3
Carbon Monoxide: 301.48 μg/m3
Nitrogen Dioxide: 16.34 μg/m3
Sulphur Dioxide: 4.72 μg/m3
Ozone: 65.6 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 1:04 PM
Sunset: 7:17 PM
Daylight: 12 hrs 25 mins
Moonrise: 12:10 AM
Moon Transit: 8:08 AM
Moonset: 4:02 PM
Moon Phase: Last Quarter
Moon Illumination: 34.0%

Best Times for Fishing or Hunting

Major Periods

7:38 AM - 10:08 AM
3:38 PM - 6:08 PM

Minor Periods

3:32 PM - 5:02 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Tuesday, September 16, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 65.2°F
Average Humidity: 71%
Chance of Rain: 0%
Wind: 8.7 mph
UV Index: 5

Air Quality

AQI: 2 - Moderate
PM2.5: 24.45 μg/m3
PM10: 29.83 μg/m3
Carbon Monoxide: 357.05 μg/m3
Nitrogen Dioxide: 42.05 μg/m3
Sulphur Dioxide: 4.23 μg/m3
Ozone: 41.38 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 1:04 PM
Sunset: 7:15 PM
Daylight: 12 hrs 22 mins
Moonrise: 1:17 AM
Moon Transit: 9:07 AM
Moonset: 4:48 PM
Moon Phase: Last Quarter
Moon Illumination: 23.8%

Best Times for Fishing or Hunting

Major Periods

8:37 AM - 11:07 AM
4:35 PM - 7:05 PM

Minor Periods

4:18 PM - 5:48 PM
12:47 AM - 2:17 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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