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Sonoma County Alerts
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WARNINGS - WATCHES - ADVISORIES - STATEMENTS
Updates every 15 Minutes
Updated:October 31, 2026 10:15 pm PDT

Coastal Flood Advisory COASTAL FLOOD ADVISORY  
Sonoma County

Effective: Sat, 10/31 5:58pm Severity: Minor
Updated: October 31, 2026 10:15 pm Urgency: Expected
Expires: Sun, 11/1 1:00am Certainty: Likely

Areas Affected: North Bay Interior Valleys - San Francisco Bay Shoreline
 
Alert Details:
* WHAT...Up to 1.5 ft of inundation above ground level is
possible in low-lying areas near shorelines and tidal
waterways.

* WHERE...Bayshore locations along the San Francisco Bay, San
Pablo Bay, and Monterey Bay.

* WHEN...Until 6 PM PDT Sunday.

* 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. More substantial impacts are expected along bayshore
Marin County where increased flooding is anticipated across
low lying areas.

* ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide
is expected to be 1.0 ft above normal (6.8 ft MLLW) on Sunday
11/01 at 3:59 PM. These predictions include up to 1.5 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.

Information:
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.
Beach Hazards Statement BEACH HAZARDS STATEMENT  
Sonoma County

Effective: Sat, 10/31 5:58pm Severity:  Moderate 
Updated: October 31, 2026 10:15 pm Urgency: Expected
Expires: Sun, 11/1 1:00am Certainty: Likely

Areas Affected: Coastal North Bay Including Point Reyes National Seashore - San Francisco Peninsula Coast
 
Alert Details:
* WHAT...An increased risk for sneaker waves and strong rip
currents.

* WHERE...Coastal North Bay Including Point Reyes National
Seashore and San Francisco Peninsula Coast Counties.

* WHEN...From late Sunday night through Tuesday evening.

* IMPACTS...Waves can sweep across the shoreline without
warning, pulling people into the sea from beaches, jetties,
and rocks.

Information:
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.