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NOAA's National Weather Service
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WARNINGS - WATCHES - ADVISORIES - STATEMENTS
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| San Mateo County | ||
| Effective: Thu, 10/8 9:45pm | Severity: Minor | |
| Updated: October 8, 2026 11:00 pm | Urgency: Expected | |
| Expires: Fri, 10/9 3:00pm | Certainty: Likely | |
| Areas Affected: San Francisco Bay Shoreline | ||
Alert
Details:
* WHAT...Up to 1.4 ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. * WHERE...Bayshore locations along the San Francisco and Monterey Bays. * WHEN...From 9 AM Friday to 3 PM PDT Tuesday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. High tides will result in flooding along coastal trails, cut off access to some low- lying beaches and coastal areas, and bring water and waves farther up the beach than typical. * ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide is expected to be 1.2 ft above normal (7.1 ft MLLW) at 11:22 AM Friday 10/9, 1.4 ft above normal (7.3 ft MLLW) at 11:50 AM Saturday 10/10, 1.3 ft above normal (7.2 ft MLLW) at 12:18 PM Sunday 10/11, 1.2 ft above normal (7.1 ft MLLW) at 12:46 PM Monday 10/12, and 1.1 ft above normal (7.0 ft MLLW) at 1:14 PM Tuesday 10/13. These predictions include up to 1.2 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. |
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| San Mateo County | ||
| Effective: Thu, 10/8 9:45pm | Severity: Moderate | |
| Updated: October 8, 2026 11:00 pm | Urgency: Expected | |
| Expires: Fri, 10/9 3:00pm | Certainty: Likely | |
| Areas Affected: Coastal North Bay Including Point Reyes National Seashore - San Francisco Peninsula Coast | ||
Alert
Details:
* WHAT...Increased risk of rip currents and sneaker waves expected with breaking waves up to 16 feet. * WHERE...Coastal North Bay Including Point Reyes National Seashore and San Francisco Peninsula Coast Counties. * WHEN...From Saturday morning through Monday afternoon. * IMPACTS...Dangerous conditions are forecast along the shoreline. Hazards include sneaker waves, strong rip currents, and large breaking waves. 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. |
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