Water Temperature of San Francisco Bay in San Rafael, CA
Current Water Temperature
Measurement Time: Friday, August 22, 2025, 6:00 AM PDT
Temperature Locations
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Local Points of Interest
Richmond, CASponsored Content
Station Name: SAN FRANCISCO BAY A RICHMOND-SAN RAFAEL BRIDGE CA
Data Source: Water Data - usgc.gov
Elevation Above Sea Level: 0 feet / 0 meters
Nearest Address:
Richmond-San Rafael Bridge
San Rafael, CA 94801
Marin County
GPS Coordinates: 37.93527778, -122.4463889
Nearby Water Temperatures
San Francisco Bay, Richmond, CA (2.6 mi)San Francisco Bay, San Francisco, CA (7.6 mi)
Rodeo Pond, Sausalito, CA (8.3 mi)
Rodeo Lagoon, Sausalito, CA (8.5 mi)
Rodeo Lagoon, Sausalito, CA (8.7 mi)
San Francisco Bay, San Francisco, CA (9.0 mi)
San Francisco Bay, San Francisco, CA (9.5 mi)
San Francisco Bay, Alameda, CA (13.8 mi)
Carquinez Strait, Martinez, CA (18.8 mi)
Suisun Bay, Concord, CA (23.7 mi)
San Francisco Bay, San Mateo, CA (23.8 mi)
Pacific Ocean, San Francisco, CA (24.8 mi)
Drakes Bay, Inverness, CA (29.0 mi)
Redwood Creek, Redwood City, CA (32.3 mi)
San Francisco Bay, Menlo Park, CA (34.7 mi)
Weather for San Rafael, California
Current Weather

Humidity: 64%
Feels Like: 70°F
Wind: SW 7.8 mph
Wind Gusts: 13 mph
Precipitation: 0 in
Cloud Cover: 25%
Visibility: 9 mi
UV Index: 8.2
Five Day Weather Forecast

Fri
H: 67°F
L: 55°F

Sat
H: 65°F
L: 56°F

Sun
H: 68°F
L: 57°F

Mon
H: 67°F
L: 56°F

Tue
H: 68°F
L: 57°F
Air Quality
Nitrogen Dioxide: 30.71 μg/m3
Sulphur Dioxide: 2.41 μg/m3
Ozone: 42 μg/m3
Astronomical
Sun Transit: 1:12 PM
Sunset: 7:53 PM
Daylight: 13 hrs 21 mins
Moon Transit: 12:55 AM
Moonset: 7:52 PM
Moon Phase: New
Moon Illumination: 0.0%
Best Times for Fishing or Hunting
Major Periods
8:21 PM - 10:51 PM12:25 AM - 2:55 PM
Minor Periods
7:22 PM - 8:52 PM5:18 AM - 6:48 AM
Action Rating: 5 out of 5
Heat Advisory issued August 22 at 5:15AM PDT until August 23 at 9:00PM PDT by NWS San Francisco CA
Effective: Fri August 22, 2025, 5:15 AM
Expires: Fri August 22, 2025, 2:00 PM
* WHAT...Daytime temperatures in the 90s to low 100s expected. Nighttime temperatures in the low 60s in the Santa Clara Valley and upper 60s to mid 70s at higher elevations. * WHERE...The Santa Clara Valley and Eastern Hills, The East Bay Hills and Valleys, Interior Monterey County and the Santa Lucia Range, Most of San Benito County and the Cholame Hills in Southeast Monterey County, North Bay Interior Mountains, and Southern Salinas Valley/Arroyo Seco and Lake San Antonio. * WHEN...Until 9 PM PDT Saturday. * IMPACTS...Hot conditions can cause heat illnesses. This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Impacts possible in some health systems and in heat-sensitive industries.
Hydration is a critical piece to surviving the heat. Drink water, and if possible, take water to those who are vulnerable. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to the early morning or evening. Take action when you experience symptoms of heat exhaustion and/or heat stroke. Beat the heat and check the backseat! Do not leave young children or pets in unattended vehicles.
Heat Advisory issued August 22 at 5:15AM PDT until August 23 at 9:00PM PDT by NWS San Francisco CA
Effective: Fri August 22, 2025, 5:15 AM
Expires: Fri August 22, 2025, 2:00 PM
* WHAT...Daytime temperatures in the 90s to low 100s expected. Nighttime temperatures in the low 60s in the Santa Clara Valley and upper 60s to mid 70s at higher elevations. * WHERE...The Santa Clara Valley and Eastern Hills, The East Bay Hills and Valleys, Interior Monterey County and the Santa Lucia Range, Most of San Benito County and the Cholame Hills in Southeast Monterey County, North Bay Interior Mountains, and Southern Salinas Valley/Arroyo Seco and Lake San Antonio. * WHEN...Until 9 PM PDT Saturday. * IMPACTS...Hot conditions can cause heat illnesses. This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Impacts possible in some health systems and in heat-sensitive industries.
Hydration is a critical piece to surviving the heat. Drink water, and if possible, take water to those who are vulnerable. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to the early morning or evening. Take action when you experience symptoms of heat exhaustion and/or heat stroke. Beat the heat and check the backseat! Do not leave young children or pets in unattended vehicles.
Heat Advisory issued August 22 at 5:15AM PDT until August 22 at 10:00PM PDT by NWS San Francisco CA
Effective: Fri August 22, 2025, 5:15 AM
Expires: Fri August 22, 2025, 2:00 PM
* WHAT...Daytime temperatures in the 90s with nighttime temperatures ranging from upper 50s in San Mateo County to mid 70s along the ridge. * WHERE...The Santa Cruz Mountains. * WHEN...Until 10 PM PDT this evening. * IMPACTS...Hot conditions can cause heat illnesses. This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Impacts possible in some health systems and in heat-sensitive industries.
Hydration is a critical piece to surviving the heat. Drink water, and if possible, take water to those who are vulnerable. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to the early morning or evening. Take action when you experience symptoms of heat exhaustion and/or heat stroke. Beat the heat and check the backseat! Do not leave young children or pets in unattended vehicles.
Heat Advisory issued August 22 at 5:15AM PDT until August 22 at 10:00PM PDT by NWS San Francisco CA
Effective: Fri August 22, 2025, 5:15 AM
Expires: Fri August 22, 2025, 2:00 PM
* WHAT...Daytime temperatures in the 90s with nighttime temperatures ranging from upper 50s in San Mateo County to mid 70s along the ridge. * WHERE...The Santa Cruz Mountains. * WHEN...Until 10 PM PDT this evening. * IMPACTS...Hot conditions can cause heat illnesses. This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Impacts possible in some health systems and in heat-sensitive industries.
Hydration is a critical piece to surviving the heat. Drink water, and if possible, take water to those who are vulnerable. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to the early morning or evening. Take action when you experience symptoms of heat exhaustion and/or heat stroke. Beat the heat and check the backseat! Do not leave young children or pets in unattended vehicles.
Heat Advisory issued August 22 at 5:15AM PDT until August 23 at 9:00PM PDT by NWS San Francisco CA
Effective: Fri August 22, 2025, 5:15 AM
Expires: Fri August 22, 2025, 2:00 PM
* WHAT...Daytime temperatures in the 90s to low 100s expected. Nighttime temperatures in the low 60s in the Santa Clara Valley and upper 60s to mid 70s at higher elevations. * WHERE...The Santa Clara Valley and Eastern Hills, The East Bay Hills and Valleys, Interior Monterey County and the Santa Lucia Range, Most of San Benito County and the Cholame Hills in Southeast Monterey County, North Bay Interior Mountains, and Southern Salinas Valley/Arroyo Seco and Lake San Antonio. * WHEN...Until 9 PM PDT Saturday. * IMPACTS...Hot conditions can cause heat illnesses. This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Impacts possible in some health systems and in heat-sensitive industries.
Hydration is a critical piece to surviving the heat. Drink water, and if possible, take water to those who are vulnerable. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to the early morning or evening. Take action when you experience symptoms of heat exhaustion and/or heat stroke. Beat the heat and check the backseat! Do not leave young children or pets in unattended vehicles.
Weather Forecast
Average Temperature: 59.9°F
Average Humidity: 89%
Wind: 9.4 mph
UV Index: 2.2
Air Quality
Nitrogen Dioxide: 16.5 μg/m3
Sulphur Dioxide: 3.83 μg/m3
Ozone: 66.44 μg/m3
Astronomical
Sun Transit: 1:12 PM
Sunset: 7:53 PM
Daylight: 13 hrs 21 mins
Moon Transit: 12:55 AM
Moonset: 7:52 PM
Moon Phase: New
Moon Illumination: 0.0%
Best Times for Fishing or Hunting
Major Periods
8:21 PM - 10:51 PM12:25 AM - 2:55 PM
Minor Periods
7:22 PM - 8:52 PM5:18 AM - 6:48 AM
Action Rating: 5 out of 5
Weather Forecast
Average Temperature: 58.9°F
Average Humidity: 91%
Wind: 11.2 mph
UV Index: 2.1
Air Quality
Nitrogen Dioxide: 19.57 μg/m3
Sulphur Dioxide: 3.1 μg/m3
Ozone: 54.36 μg/m3
Astronomical
Sun Transit: 1:12 PM
Sunset: 7:51 PM
Daylight: 13 hrs 19 mins
Moon Transit: 1:41 PM
Moonset: 8:16 PM
Moon Phase: New
Moon Illumination: 1.4%
Best Times for Fishing or Hunting
Major Periods
9:05 PM - 11:35 PM1:11 PM - 3:41 PM
Minor Periods
7:46 PM - 9:16 PM6:25 AM - 7:55 AM
Action Rating: 5 out of 5
Weather Forecast
Average Temperature: 60.6°F
Average Humidity: 88%
Wind: 11.9 mph
UV Index: 2.2
Air Quality
Nitrogen Dioxide: 12.07 μg/m3
Sulphur Dioxide: 1.98 μg/m3
Ozone: 56.32 μg/m3
Astronomical
Sun Transit: 1:12 PM
Sunset: 7:50 PM
Daylight: 13 hrs 17 mins
Moon Transit: 2:23 PM
Moonset: 8:39 PM
Moon Phase: New
Moon Illumination: 0.1%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM1:53 PM - 4:23 PM
Minor Periods
8:09 PM - 9:39 PM7:29 AM - 8:59 AM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 59.8°F
Average Humidity: 86%
Wind: 13.2 mph
UV Index: 2.2
Air Quality
Nitrogen Dioxide: 11.23 μg/m3
Sulphur Dioxide: 2.06 μg/m3
Ozone: 42.76 μg/m3
Astronomical
Sun Transit: 1:11 PM
Sunset: 7:49 PM
Daylight: 13 hrs 14 mins
Moon Transit: 3:04 PM
Moonset: 9:00 PM
Moon Phase: New
Moon Illumination: 1.9%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM2:34 PM - 5:04 PM
Minor Periods
8:30 PM - 10:00 PM8:30 AM - 10:00 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 61.2°F
Average Humidity: 81%
Wind: 14.3 mph
UV Index: 0
Air Quality
Nitrogen Dioxide: 17.66 μg/m3
Sulphur Dioxide: 1.78 μg/m3
Ozone: 31.69 μg/m3
Astronomical
Sun Transit: 1:11 PM
Sunset: 7:47 PM
Daylight: 13 hrs 12 mins
Moon Transit: 3:45 PM
Moonset: 9:22 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.1%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM3:15 PM - 5:45 PM
Minor Periods
8:52 PM - 10:22 PM9:30 AM - 11:00 AM
Action Rating: 2 out of 5