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

Beach Hazards Statement issued January 12 at 5:54AM PST until January 12 at 7:00PM PST by NWS San Francisco CA

Effective: Mon January 12, 2026, 5:54 AM
Expires: Mon January 12, 2026, 7:00 PM

* WHAT...Hazardous beach conditions expected with increased risk for rip currents, sneaker waves, and larger shore break. * WHERE...Pacific Coast from Sonoma county to Monterey county. * WHEN...Through 7 PM this evening. * IMPACTS...Dangerous conditions are forecast along the shoreline. Hazards include sneaker waves, strong rip currents, and large breaking waves.

Conditions are favorable for a heightened risk of sneaker waves. Stay off the rocks and NEVER turn your back on the ocean! 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.

Cold Weather Advisory issued January 12 at 1:32PM PST until January 13 at 9:00AM PST by NWS San Francisco CA

Effective: Mon January 12, 2026, 1:32 PM
Expires: Mon January 12, 2026, 9:45 PM

* WHAT...Cold conditions with temperatures between 33 and 36 expected. Some outlying regions of the North Bay, East Bay, and extreme interior Central Coast may see temperatures as low as 30 degrees. * WHERE...Interior valleys of the North and East Bay, the Southern Salinas Valley, and interior portions of the Central Coast. * WHEN...From 1 AM to 9 AM PST Tuesday. * IMPACTS...Cold conditions will be hazardous to sensitive populations such as unhoused individuals. Prolonged exposure to the cold conditions will lead to hypothermia for people, pets, and livestock. Cold conditions may damage or kill sensitive crops, plants, and vegetation if appropriate precautions are not taken. * ADDITIONAL DETAILS...Conditions in the far southern Salinas Valley will be colder with temperatures in the low 30s.

Cover or tend to sensitive crops, plants, and vegetation. Ensure portable heaters are working properly and are used correctly to avoid sparking a fire indoors. Do not use generators or grills inside as carbon monoxide poisoning can result. Check with your local, city, or county officials for information on available warming centers.