Tomorrow | Weather | San Mateo, California

Active Weather Warnings
Friday, October 30, 2026
Cloudy Weather
Day 70°
Night 52°
Precipitation 4 %
Wind 8 mph
UV Index (0 - 11+) 3
Weather Forecast History
Last Year's Weather on This Day (October 30, 2025)
Cloudy Night

Day

66°

Night

54°

Wind

7 mph

Precipitation

40 %

Weather Alerts and Warnings for

Minor Expected Likely

Coastal Flood Advisory

Coastal Flood Advisory issued October 28 at 1:46PM PDT until October 31 at 6:00PM PDT by NWS San Francisco CA
Oct 28, 1:46 PM → Oct 31, 6:00 PM
WHAT: Up to 1.9 ft of inundation above ground level is
possible in low-lying areas near shorelines and tidal
waterways.

WHERE: Bay Shoreline locations of San Pablo Bay, San
Francisco Bay, and Monterey Bay.

WHEN: Until 6 PM PDT Saturday.

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 1.9 ft above normal (7.7 ft MLLW) at 01:43 PM
Thursday 10/29, 1.6 ft above normal (7.4 ft MLLW) at 02:39 PM
Friday 10/30, and 1.1 feet above normal (6.9 ft MLLW) at 03:44
PM on Saturday 10/31. 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.
+ Read More
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.
Updated: Oct 29, 2:34 AM Source: NWS Alert