Coastal Flood Advisory

Locations Affected

Santa Rosa, CA ∙ Napa, CA ∙ Petaluma, CA ∙ San Rafael, CA ∙ Novato, CA ∙ Gnoss Field Airport, CA ∙ Calistoga, CA ∙ Santa Venetia, CA ∙ Larkfield-Wikiup, CA ∙ Black Point, CA

Full Alert Message

Coastal Hazard Message National Weather Service San Francisco CA 1233 PM PDT Wed Oct 7 2026 ...COASTAL FLOOD ADVISORY NOW IN EFFECT UNTIL 4 PM PDT WEDNESDAY... * WHAT...Up to 1.2 ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. * WHERE...Bayshore locations along the San Pablo Bay. * WHEN...Until 4 PM PDT Wednesday. * IMPACTS...High tides will result in flooding of low-lying infrastructure, isolated road closures, and coastal erosion. Rising tides will bring water and waves farther up the beach than normal, restricting escape from beaches and coastal areas. * ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide is expected to be 1.0 ft above normal (6.78 ft MLLW) at 10:51 AM Thursday 10/8, 1.0 ft above normal (6.86 ft MLLW) at 11:22 AM Friday 10/9, 1.2 ft above normal (7.06 ft MLLW) at 11:50 AM Saturday 10/10, 1.2 ft above normal (7.08 ft MLLW) at 12:18 PM Sunday 10/11, 1.2 ft above normal (7.03 ft MLLW) at 12:46 PM Monday 10/12, 1.1 ft above normal (6.90 ft MLLW) at 1:14 PM Tuesday 10/13, and 0.9 ft above normal (6.72 ft MLLW) at 1:46 PM Wednesday 10/14. These predictions include up to 0.9 ft of 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. 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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