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NOAA's National Weather Service
Each location shows all alerts on one page
WARNINGS - WATCHES - ADVISORIES - STATEMENTS
Updates every 15 Minutes
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| San Mateo County | ||
| Effective: Thu, 10/8 1:03pm | Severity: Minor | |
| Updated: October 8, 2026 6:45 pm | Urgency: Expected | |
| Expires: Thu, 10/8 9:15pm | Certainty: Likely | |
| Areas Affected: San Francisco Bay Shoreline | ||
Alert
Details:
* 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 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 (7.06 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 1.0 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 9:57am | Severity: Moderate | |
| Updated: October 8, 2026 6:45 pm | Urgency: Expected | |
| Expires: Thu, 10/8 10:00pm | Certainty: Likely | |
| Areas Affected: Sonoma Coastal Range - North Bay Interior Mountains - North Bay Interior Valleys - San Francisco Bay Shoreline - East Bay Interior Valleys - Santa Cruz Mountains - Santa Clara Valley Including San Jose - Eastern Santa Clara Hills - East Bay Hills - Southern Salinas Valley/Arroyo Seco and Lake San Antonio - Santa Lucia Mountains and Los Padres National Forest - Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park | ||
Alert
Details:
* WHAT...Hot conditions with maximum temperatures in the mid-90s to near 105. * WHERE...The East Bay and San Francisco Bay Shoreline, North Bay Interior Mountains and Valleys, The Santa Clara Valley and Eastern Hills, The Santa Cruz Mountains, Interior Monterey County and the Santa Lucia Range, Most of San Benito County and the Cholame Hills in Southeast Monterey County, and Southern Salinas Valley/Arroyo Seco and Lake San Antonio. * WHEN...Until 10 PM PDT this evening. * IMPACTS...This level of heat affects anyone without effective cooling and/or adequate hydration. Impacts likely in some health systems, heat-sensitive industries and infrastructure. Information: Hydration is a critical piece to surviving the heat. Drink water, and if possible, take water to those who are vulnerable. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to the early morning or evening. Take action when you experience symptoms of heat exhaustion and/or heat stroke. |
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| San Mateo County | ||
| Effective: Thu, 10/8 1:03pm | Severity: Moderate | |
| Updated: October 8, 2026 6:45 pm | Urgency: Expected | |
| Expires: Thu, 10/8 9:15pm | 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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