San Mateo County, CA Weather Forecast
County weather hub
Partly Sunny
Compare major city weather across San Mateo County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Partly sunny, with a high near 60. West southwest wind around 15 mph, with gusts as high as 21 mph.
County Weather Overview
This county weather page brings together forecast coverage for San Mateo County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 12 of 16 mapped cities in San Mateo County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- May 25 to May 31, 2026
- Latest sync
- May 25, 2026 5:52 PM PDT
- Forecast office
- MTR
- Source
- NOAA / NWS
Daily Outlook
This Week in San Mateo County
Sunday looks like the warmest upcoming period in San Mateo County at 69 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 51 degrees F.
The strongest winds are forecast for Tuesday at about 12 to 20 mph WNW.
The forecast from May 25 through May 31 stays mostly dry.
Forecast Details
- Last updated
- May 25, 2026 5:52 PM PDT
- Coverage
- 8 days
- Time zone
- America/Los_Angeles
- Forecast office
- MTR
- Radar station
- KMUX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly cloudy, with a low around 52. West wind 10 to 14 mph, with gusts as high as 21 mph.
Sunny, with a high near 64. West northwest wind 12 to 20 mph, with gusts as high as 29 mph.
Mostly clear, with a low around 51. West wind 3 to 18 mph, with gusts as high as 29 mph.
Sunny, with a high near 67. West southwest wind 3 to 12 mph.
Partly cloudy, with a low around 52.
Mostly sunny, with a high near 64.
Mostly cloudy, with a low around 54.
Mostly sunny, with a high near 62.
Mostly clear, with a low around 52.
Sunny, with a high near 65.
Mostly clear, with a low around 52.
Sunny, with a high near 69.
Mostly clear, with a low around 53.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Memorial Day
May 25
|
Partly Sunny
|
60°F |
15 mph
WSW
|
|
Tonight
May 25
|
Mostly Cloudy
|
52°F |
10 to 14 mph
W
|
|
Tuesday
May 26
|
Sunny
|
64°F |
12 to 20 mph
WNW
|
|
Tuesday Night
May 26
|
Mostly Clear
|
51°F |
3 to 18 mph
W
|
|
Wednesday
May 27
|
Sunny
|
67°F |
3 to 12 mph
WSW
|
|
Wednesday Night
May 27
|
Partly Cloudy
|
52°F |
10 mph
SW
|
|
Thursday
May 28
|
Mostly Sunny
|
64°F |
8 to 13 mph
SW
|
|
Thursday Night
May 28
|
Mostly Cloudy
|
54°F |
9 to 13 mph
SW
|
|
Friday
May 29
|
Mostly Sunny
|
62°F |
8 to 12 mph
SW
|
|
Friday Night
May 29
|
Mostly Clear
|
52°F |
7 to 12 mph
SW
|
|
Saturday
May 30
|
Sunny
|
65°F |
7 to 14 mph
SW
|
|
Saturday Night
May 30
|
Mostly Clear
|
52°F |
7 to 14 mph
WSW
|
|
Sunday
May 31
|
Sunny
|
69°F |
6 to 10 mph
SW
|
|
Sunday Night
May 31
|
Mostly Clear
|
53°F |
6 to 10 mph
SW
|
Major City Forecasts
Live forecast snapshots for major cities across San Mateo County.
Coverage
Forecast coverage currently spans 12 of 16 mapped cities in San Mateo County.
Largest mapped city population in this region: 106,280.
