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

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.

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.