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

Coastal Flood Advisory issued December 31 at 12:30PM PST until January 4 at 2:00PM PST by NWS San Francisco CA

Effective: Wed December 31, 2025, 12:30 PM
Expires: Thu January 1, 2026, 5:00 AM

* WHAT...Up to 2.2 ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. * WHERE...San Francisco Bay and San Pablo Bay shoreline, Monterey Bay shoreline, and the Pacific Coast. * WHEN...Until 2 PM PST Sunday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide is expected to be: 2.0 ft above normal (7.8 ft MLLW) at 8:41 AM Thursday 1/1 2.2 ft above normal (8.0 ft MLLW) at 9:34 AM Friday 1/2 2.2 ft above normal (8.0 ft MLLW) at 10:26 AM Saturday 1/3 1.8 ft above normal (7.6 ft MLLW) at 11:18 AM Sunday 1/4 These predictions include up to 1.0 feet of storm surge that will enhance the astronomical tide and flooding threat. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively.

If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.

Wind Advisory issued January 1 at 2:06AM PST until January 3 at 1:00PM PST by NWS San Francisco CA

Effective: Thu January 1, 2026, 2:06 AM
Expires: Thu January 1, 2026, 2:00 PM

* WHAT...South winds 15 to 25 mph with gusts up to 50 mph expected. * WHERE...The Central Coast, The Salinas and Carmel Valleys and Hollister Area, The Marin Hills, Western Sonoma County Hills, The Santa Cruz Mountains, San Francisco, North Bay Interior Mountains, Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, and East Bay Hills. * WHEN...From 1 PM Friday to 1 PM PST Saturday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.

Coastal Flood Advisory issued January 1 at 5:10AM PST until January 4 at 2:00PM PST by NWS San Francisco CA

Effective: Thu January 1, 2026, 5:10 AM
Expires: Thu January 1, 2026, 2:00 PM

* WHAT...Up to 2.5 ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. * WHERE...San Francisco Bay and San Pablo Bay shoreline, Monterey Bay shoreline, and the Pacific Coast. * WHEN...Until 2 PM PST Sunday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide is expected to be: 2.0 ft above normal (7.8 ft MLLW) at 8:41 AM Thursday 1/1 2.2 ft above normal (8.0 ft MLLW) at 9:34 AM Friday 1/2 2.5 ft above normal (8.30 ft MLLW) at 10:26 AM Saturday 1/3 1.8 ft above normal (7.6 ft MLLW) at 11:18 AM Sunday 1/4 These predictions include up to 1.3 feet of storm surge that will enhance the astronomical tide and flooding threat. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively.

If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.