Portola Valley, CA Weather Forecast
Local 7-day forecast
Partly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Portola Valley, CA in one place.
Partly sunny, with a high near 72.
Local Weather Overview
This forecast page for Portola Valley, CA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 16, 2026 3:23 AM PDT.
The active forecast window currently covers Apr 18 to Apr 22, 2026 for Portola Valley, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 18 to Apr 22, 2026
- Latest sync
- Apr 16, 2026 3:23 AM PDT
- Forecast office
- MTR
- Source
- NOAA / NWS
Daily Outlook
This Week in Portola Valley
Saturday looks like the warmest upcoming period in Portola Valley at 72 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 50 degrees F.
The strongest winds are forecast for Sunday at about 3 to 12 mph WSW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 16, 2026 3:23 AM PDT
- Coverage
- 5 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.
A chance of rain after 11am. Partly sunny, with a high near 68.
A chance of rain. Mostly cloudy, with a low around 53.
A chance of rain. Mostly cloudy, with a high near 64.
A chance of rain. Mostly cloudy, with a low around 52.
A chance of rain. Partly sunny, with a high near 64.
A slight chance of rain before 11pm. Partly cloudy, with a low around 50.
Mostly sunny, with a high near 67.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 18
|
Partly Sunny
|
72°F |
2 to 7 mph
S
|
|
Saturday Night
Apr 18
|
Mostly Cloudy
|
52°F |
3 to 7 mph
WSW
|
|
Sunday
Apr 19
|
Chance Light Rain
|
68°F |
3 to 12 mph
WSW
|
|
Sunday Night
Apr 19
|
Chance Light Rain
|
53°F |
7 to 12 mph
SW
|
|
Monday
Apr 20
|
Chance Light Rain
|
64°F |
7 to 12 mph
SSW
|
|
Monday Night
Apr 20
|
Chance Light Rain
|
52°F |
9 mph
SSW
|
|
Tuesday
Apr 21
|
Chance Light Rain
|
64°F |
9 mph
SW
|
|
Tuesday Night
Apr 21
|
Slight Chance Light Rain then Partly Cloudy
|
50°F |
6 to 9 mph
WSW
|
|
Wednesday
Apr 22
|
Mostly Sunny
|
67°F |
5 to 9 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Portola Valley.
