Local weather forecast

Weather in San Mateo, CA

Updated 2026-08-11 10:45 local time · ZIP codes 94401, 94402, 94403, 94404

Partly cloudy
Now64°F

Partly cloudy

High / Low79° / 55°
Rain chance12%
Wind4 mph
Weather alerts

Active alerts

1
Coastal Flood Advisory issued August 10 at 10:18PM PDT until August 13 at 2:00AM PDT by NWS San Francisco CA

* WHAT...Up to 1.6 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 2 AM PDT Thursday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide is expected to be 1.6 ft above normal (7.44 ft MLLW) at 10:57 PM Tuesday 8/11 and 1.4 ft above normal (7.24 ft MLLW) at 11:49 PM Wednesday 8/12. These predictions include both astronomical tides and roughly 3-6 inches of additional water mainly from a combination of thermal expansion and accumulated sea level rise since the tidal datum was established (1983- 2001). High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively.

Safety instructions

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.

Hourly

Next hours

NowPartly cloudy64°10% rain
12 PMSunny70°7% rain
1 PMSunny73°5% rain
2 PMSunny79°4% rain
3 PMSunny78°5% rain
4 PMSunny76°5% rain
5 PMSunny75°6% rain
6 PMSunny73°7% rain
7 PMSunny69°10% rain
8 PMSunny62°11% rain
9 PMClear61°11% rain
10 PMClear56°13% rain
Forecast

3-day weather forecast

Today2026-08-11
Sunny
79° 55°Sunny
Rain 12%Gust 9 mph
Tomorrow2026-08-12
Patchy rain nearby
71° 55°Patchy rain nearby
Rain 26%Gust 9 mph
Thursday2026-08-13
Patchy rain nearby
67° 57°Patchy rain nearby
Rain 37%Gust 15 mph
Conditions

Weather details

Feels like64°F
Humidity68%
Pressure29.97 inHg
Visibility10 mi
Wind4 mph SW
Wind gusts5 mph
Precipitation0.00 in
UV index4
Daylight

Sunrise, sunset and moon

Sunrise06:21 AM
Sunset08:07 PM
Moonrise04:34 AM
Moon phaseNew Moon
Practical guide

Weather insights for today

Umbrella not essential

Rain chance stays relatively low over the next 12 hours (up to 13%).

Light layers should work

It feels like 64°F with winds near 4 mph.

Best window: 12 PM

70°F, 7% rain chance and 6 mph wind.

Driving conditions look generally normal

Visibility is around 10 mi; gusts may reach 11 mph.

Good conditions for an easy run

Current temperature is 64°F, wind 4 mph, rain chance up to 13%.

Moderate UV protection recommended

UV index is 4. Sunscreen and sunglasses are sensible for longer outdoor time.

San Mateo weather today

Partly cloudy and 64°F in San Mateo, CA. Today's high is 79°F with a 12% rain chance. Winds are around 4 mph with gusts near 5 mph. Relative humidity is 68%, pressure is 29.97 inHg, and visibility is about 10 miles.

Tonight and tomorrow in San Mateo

Sunrise is at 06:21 AM and sunset is at 08:07 PM. Tomorrow's forecast calls for Patchy rain nearby with a high near 71°F and a low near 55°F. The maximum rain chance is 26%.

Nearby

Weather near San Mateo

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