Water Temperature of San Francisco Bay in San Francisco, CA

Current Water Temperature

59.0°F

Measurement Time: Thursday, May 14, 2026, 10:00 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°F
Sunny
Sunny
64°F
70.4°F
63%
W 12.5 mph
17.7 mph
69.5°F
55.1°F
0 in
25%
9 mi
1017 mbar
1.3

Five Day Weather Forecast

Sunny
Thu
H: 75°F
L: 49°F
Sunny
Fri
H: 65°F
L: 51°F
Sunny
Sat
H: 65°F
L: 52°F
Sunny
Sun
H: 64°F
L: 52°F
Sunny
Mon
H: 67°F
L: 55°F

Air Quality

AQI: 1 - Good
PM2.5: 7.75 μg/m3
PM10: 11.55 μg/m3
Carbon Monoxide: 147.85 μg/m3
Nitrogen Dioxide: 7.75 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 70 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:06 PM
Sunset: 8:12 PM
Daylight: 14 hrs 12 mins
Moonrise: 4:17 AM
Moon Transit: 11:06 AM
Moonset: 6:08 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

6:33 PM - 9:03 PM
10:36 AM - 1:06 PM

Minor Periods

5:38 PM - 7:08 PM
3:47 AM - 5:17 AM

Action Rating: 2 out of 5

Beach Hazards Statement issued May 14 at 12:04PM PDT until May 18 at 9:00AM PDT by NWS San Francisco CA

Effective: Thu May 14, 2026, 12:04 PM
Expires: Fri May 15, 2026, 5:00 AM

* WHAT...Strong northerly winds will generate very rough conditions at area beaches along with strong rip and long shore currents. * WHERE...Greatest impacts will be along west facing beaches of the Pacific coastline. * WHEN...From Friday afternoon through Monday morning. * IMPACTS...Dangerous wind and wave conditions will impact beaches and water activities such as swimming, surfing, boating, and tide pooling. Rough seas can sweep up the beach and over rocks and jetties, pulling people into a cold turbulent ocean. Rip currents will be stronger than normal and long shore currents can move people and items in the water quickly away from the point of entry. Local beach and cliff erosion is possible. Water temperatures will also cool rapidly due to strong upwelling conditions during this time. Large tidal swings can cutoff access to beach walkers.

Stay off of jetties, piers, rocks, and other waterside infrastructure. Remain out of the water to avoid hazardous surf and NEVER turn your back on the ocean. Monitor local weather, surf, and tide forecasts at www.weather.gov/mtr.


Fire Weather Watch issued May 14 at 10:24AM PDT until May 18 at 8:00PM PDT by NWS Sacramento CA

Effective: Thu May 14, 2026, 10:24 AM
Expires: Fri May 15, 2026, 5:00 PM

The National Weather Service in Sacramento has issued a Fire Weather Watch for gusty winds and low humidity, which is in effect from late Friday night through Monday evening. * Winds...North winds 15 to 25 mph. Gusts 35 to 45 mph, locally up to 50 mph around the Delta. * Humidity...Daytime minimum humidities of 9 to 15%. * Highest Threat...Along the Interstate 5 corridor in the Sacramento Valley. Strongest winds are expected Sunday into Monday. * Impacts...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended

A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.
Thursday, May 14, 2026

Weather Forecast

Sunny
75.2°F
49.1°F
60.9°F
70%
0 in
0%
0%
13 mph
8.9


Air Quality

AQI: 1 - Good
PM2.5: 8.65 μg/m3
PM10: 12.86 μg/m3
Carbon Monoxide: 173.69 μg/m3
Nitrogen Dioxide: 8.11 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 65.32 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:06 PM
Sunset: 8:12 PM
Daylight: 14 hrs 12 mins
Moonrise: 4:17 AM
Moon Transit: 11:06 AM
Moonset: 6:08 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

6:33 PM - 9:03 PM
10:36 AM - 1:06 PM

Minor Periods

5:38 PM - 7:08 PM
3:47 AM - 5:17 AM

Action Rating: 2 out of 5

Friday, May 15, 2026

Weather Forecast

Sunny
64.7°F
51.1°F
57.5°F
69%
0 in
0%
0%
16.8 mph
8.5


Air Quality

AQI: 1 - Good
PM2.5: 8.41 μg/m3
PM10: 12.32 μg/m3
Carbon Monoxide: 158.17 μg/m3
Nitrogen Dioxide: 6.78 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 67.44 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:06 PM
Sunset: 8:13 PM
Daylight: 14 hrs 14 mins
Moonrise: 4:49 AM
Moon Transit: 12:00 AM
Moonset: 7:26 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

7:30 PM - 10:00 PM
11:30 AM - 2:00 PM

Minor Periods

6:56 PM - 8:26 PM
4:19 AM - 5:49 AM

Action Rating: 5 out of 5

Saturday, May 16, 2026

Weather Forecast

Sunny
64.5°F
51.9°F
57°F
65%
0 in
0%
0%
21.5 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 8.96 μg/m3
PM10: 13.49 μg/m3
Carbon Monoxide: 163.48 μg/m3
Nitrogen Dioxide: 4.99 μg/m3
Sulphur Dioxide: 1.27 μg/m3
Ozone: 78.2 μg/m3

Astronomical

Sunrise: 5:59 AM
Sun Transit: 1:06 PM
Sunset: 8:14 PM
Daylight: 14 hrs 15 mins
Moonrise: 5:27 AM
Moon Transit: 1:00 PM
Moonset: 8:46 PM
Moon Phase: New
Moon Illumination: 2.0%

Best Times for Fishing or Hunting

Major Periods

8:31 PM - 11:01 PM
12:30 AM - 3:00 PM

Minor Periods

8:16 PM - 9:46 PM
4:57 AM - 6:27 AM

Action Rating: 6 out of 5

Sunday, May 17, 2026

Weather Forecast

Sunny
63.6°F
51.5°F
57.4°F
64%
0 in
0%
0%
14.3 mph
8.8


Air Quality

AQI: 1 - Good
PM2.5: 8.14 μg/m3
PM10: 12.12 μg/m3
Carbon Monoxide: 145.02 μg/m3
Nitrogen Dioxide: 5.68 μg/m3
Sulphur Dioxide: 1.37 μg/m3
Ozone: 70.72 μg/m3

Astronomical

Sunrise: 5:58 AM
Sun Transit: 1:06 PM
Sunset: 8:15 PM
Daylight: 14 hrs 17 mins
Moonrise: 6:15 AM
Moon Transit: 2:05 PM
Moonset: 10:02 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:35 PM - 4:05 PM

Minor Periods

9:32 PM - 11:02 PM
5:45 AM - 7:15 AM

Action Rating: 4 out of 5

Monday, May 18, 2026

Weather Forecast

Sunny
66.7°F
55.1°F
60°F
65%
0 in
0%
0%
11.9 mph
8.6


Air Quality

AQI: 1 - Good
PM2.5: 7.7 μg/m3
PM10: 10.84 μg/m3
Carbon Monoxide: 152.08 μg/m3
Nitrogen Dioxide: 9.79 μg/m3
Sulphur Dioxide: 1.37 μg/m3
Ozone: 60.23 μg/m3

Astronomical

Sunrise: 5:57 AM
Sun Transit: 1:06 PM
Sunset: 8:16 PM
Daylight: 14 hrs 19 mins
Moonrise: 7:15 AM
Moon Transit: 3:12 PM
Moonset: 11:10 PM
Moon Phase: New
Moon Illumination: 2.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:42 PM - 5:12 PM

Minor Periods

12:00 AM - 12:00 AM
6:45 AM - 8:15 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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