Coastal Flood Advisory

Locations Affected

Fremont, CA ∙ Oakland, CA ∙ San Francisco, CA ∙ Sunnyvale, CA ∙ Hayward, CA ∙ Santa Rosa, CA ∙ Daly City, CA ∙ San Mateo, CA ∙ Richmond, CA ∙ Berkeley, CA

Full Alert Message

Coastal Hazard Message National Weather Service San Francisco CA 900 PM PDT Tue Jul 7 2026 ...COASTAL FLOOD ADVISORY IN EFFECT FROM 4 PM THURSDAY JULY 9 TO 4 AM PDT THURSDAY JULY 16... * WHAT...Up to 1.7 ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. * WHERE...North Bay Interior Valleys and San Francisco Bay Shoreline Counties. * WHEN...From 4 PM Thursday July 9, to 4 AM PDT Thursday July 16. * IMPACTS...High tide 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 0.9 ft above normal (6.7 ft MLLW) at 7:25 PM 7/9, 1.2 ft above normal (7.0 ft MLLW) at 8:17 PM 7/10, 1.5 ft above normal (7.3 ft MLLW) at 9:11 PM 7/11, 1.7 ft above normal (7.5 ft MLLW) at 10:06 PM 7/12, 1.7 ft above normal (7.5 ft MLLW) at 11:01 PM 7/13, 1.6 ft above normal (7.4 ft MLLW) at 11:55 PM 7/14, 1.3 ft above normal (7.1 ft MLLW) at 12:48 AM 7/16. These predictions include both astronomical tides and roughly 3-6 inches of additional water mainly from a combination of thermal expansion and accumulated sea level rise since the tidal datum was established (1983-2001). High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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.

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