Portola Valley, CA Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Portola Valley, CA in one place.
Sunny. High near 84, with temperatures falling to around 82 in the afternoon. East wind 0 to 6 mph.
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: Oct 15, 2026 7:54 PM PDT.
The active forecast window currently covers Oct 16 to Oct 21, 2026 for Portola Valley, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 16 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 7:54 PM PDT
- Forecast office
- MTR
- Source
- NOAA / NWS
Daily Outlook
This Week in Portola Valley
Friday looks like the warmest upcoming period in Portola Valley at 84 degrees F.
Sunday Night is the coolest period ahead with temperatures near 52 degrees F.
The strongest winds are forecast for Monday at about 10 mph WSW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 7:54 PM PDT
- Coverage
- 7 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 clear, with a low around 60. Wind around 0 mph.
Sunny, with a high near 81. North northwest wind 0 to 3 mph.
Mostly clear, with a low around 56.
Sunny, with a high near 68.
Partly cloudy, with a low around 52.
Partly sunny, with a high near 60.
A chance of rain after 11pm. Mostly cloudy, with a low around 52.
A chance of rain. Partly sunny, with a high near 62.
A slight chance of rain. Mostly cloudy, with a low around 52.
A slight chance of rain before 5pm. Mostly sunny, with a high near 64.
Partly cloudy, with a low around 52.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Oct 16
|
Sunny
|
84°F |
0 to 6 mph
E
|
|
Friday Night
Oct 16
|
Mostly Clear
|
60°F |
0 mph
|
|
Saturday
Oct 17
|
Sunny
|
81°F |
0 to 3 mph
NNW
|
|
Saturday Night
Oct 17
|
Mostly Clear
|
56°F |
2 mph
SW
|
|
Sunday
Oct 18
|
Sunny
|
68°F |
2 to 8 mph
SW
|
|
Sunday Night
Oct 18
|
Partly Cloudy
|
52°F |
8 mph
WSW
|
|
Monday
Oct 19
|
Partly Sunny
|
60°F |
10 mph
WSW
|
|
Monday Night
Oct 19
|
Chance Light Rain
|
52°F |
3 to 10 mph
WSW
|
|
Tuesday
Oct 20
|
Chance Light Rain
|
62°F |
5 mph
SW
|
|
Tuesday Night
Oct 20
|
Slight Chance Light Rain
|
52°F |
3 mph
NNW
|
|
Wednesday
Oct 21
|
Slight Chance Light Rain
|
64°F |
2 to 6 mph
NW
|
|
Wednesday Night
Oct 21
|
Partly Cloudy
|
52°F |
2 to 6 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Portola Valley.
