Current Conditions

San Mateo, California

59°F15°C
Partly Cloudy

Wind

W 7 mph11 km/h

Humidity

89%

Cloud Cover

34%

As of Thursday, July 23, 2026 at 11:31 PM PDT

Today's Outlook

Night

Partly cloudy, with a low around 57°F14°C. Breezy from the WNW at 8 to 10 mph12 to 16 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
FridayJul 24Partly CloudyHigh 67°F20°CLow 57°F14°CPrecip 0 in0 mmCloud 43%Wind WNW 9 mph14 km/hFriday: Partly cloudy and mild, with a high of 67°F20°C and morning low of 59°F15°C. Breezy from the WNW at 10 to 12 mph16 to 19 km/h. Friday Night: Partly cloudy, with a low around 57°F14°C. Breezy from the WNW at 8 to 10 mph12 to 16 km/h.
SaturdayJul 25ClearHigh 68°F20°CLow 57°F14°CPrecip 0 in0 mmCloud 38%Wind WNW 9 mph14 km/hSaturday: Partly cloudy and warm, with a high of 68°F20°C and morning low of 60°F15°C. Breezy from the WNW at 10 to 12 mph16 to 19 km/h. Saturday Night: Partly cloudy, with a low around 57°F14°C. Breezy from the WNW at 8 to 9 mph12 to 15 km/h.
SundayJul 26Partly CloudyHigh 68°F20°CLow 58°F14°CPrecip 0 in0.1 mm1%Cloud 47%Wind W 8 mph13 km/hSunday: Partly cloudy and mild, with a high of 68°F20°C and morning low of 60°F16°C. Breezy from the W at 9 to 11 mph15 to 17 km/h. Sunday Night: Partly cloudy, with a low around 58°F14°C. Breezy from the W at 8 to 9 mph12 to 15 km/h.
MondayJul 27ClearHigh 68°F20°CLow 57°F14°CPrecip 0 in0 mmCloud 32%Wind W 8 mph13 km/hMonday: Partly cloudy and warm, with a high of 68°F20°C and morning low of 59°F15°C. Breezy from the W at 9 to 11 mph14 to 17 km/h. Monday Night: Partly cloudy, with a low around 57°F14°C. Breezy from the W at 7 to 9 mph12 to 14 km/h.
TuesdayJul 28ClearHigh 71°F22°CLow 58°F14°CPrecip 0 in0 mmCloud 20%Wind W 8 mph13 km/hTuesday: Mostly clear and warm, with a high of 71°F22°C and morning low of 61°F16°C. Breezy from the W at 9 to 11 mph14 to 18 km/h. Tuesday Night: Mostly clear, with a low around 58°F14°C. Breezy from the W at 7 to 8 mph11 to 13 km/h.
WednesdayJul 29ClearHigh 70°F21°CLow 59°F15°CPrecip 0 in0 mmCloud 34%Wind W 7 mph11 km/hWednesday: Partly cloudy and warm, with a high of 70°F21°C and morning low of 60°F16°C. Breezy from the W at 8 to 10 mph13 to 16 km/h. Wednesday Night: Partly cloudy, with a low around 59°F15°C. Breezy from the W at 6 to 8 mph10 to 12 km/h.
ThursdayJul 30ClearHigh 70°F21°CLow 58°F14°CPrecip 0 in0 mmCloud 37%Wind W 6 mph10 km/hThursday: Partly cloudy and warm, with a high of 70°F21°C and morning low of 59°F15°C. Breezy from the W at 7 to 9 mph12 to 15 km/h. Thursday Night: Partly cloudy, with a low around 58°F14°C. Breezy from the W at 6 to 7 mph9 to 11 km/h.

15-Day Forecast

Day High (°F) Low (°F) Precip (mm) Cloud Cover (%) Condition Wind (mph)

Nearby Cities

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

PatternExampleDescription
/weather/{country}/{city}//weather/united-states/san-francisco/City forecast (canonical URL)
/weather/{city}//weather/tokyo/Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}//weather/united-states/california/san-francisco/With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}/weather/nearby?lat=48.1&lon=11.5Find nearest city by coordinates
/weather/{country}//weather/germany/Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 37.5630°N, 122.3255°W·Elevation: 13m·Timezone: America/Los_Angeles·Population: 103,536