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. High near 66, with temperatures falling to around 64 in the afternoon. Southwest wind around 8 mph. New rainfall amounts less than a tenth of an inch possible.
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: Jul 17, 2026 12:39 PM PDT.
The active forecast window currently covers Jul 18 to Jul 23, 2026 for Portola Valley, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 18 to Jul 23, 2026
- Latest sync
- Jul 17, 2026 12:39 PM PDT
- Forecast office
- MTR
- Source
- NOAA / NWS
Daily Outlook
This Week in Portola Valley
Tuesday looks like the warmest upcoming period in Portola Valley at 72 degrees F.
Saturday Night is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Wednesday at about 6 to 9 mph WSW.
Precipitation is mentioned in 1 upcoming forecast period.
Forecast Details
- Last updated
- Jul 17, 2026 12:39 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 cloudy, with a low around 54. Southwest wind around 7 mph.
Mostly cloudy, with a high near 67. Southwest wind 5 to 8 mph.
Cloudy, with a low around 56.
Mostly cloudy, with a high near 68.
Mostly cloudy, with a low around 58.
Partly sunny, with a high near 72.
Mostly cloudy, with a low around 59.
Partly sunny, with a high near 70.
Mostly cloudy, with a low around 57.
Partly sunny, with a high near 69.
Mostly cloudy, with a low around 56.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Jul 18
|
Partly Sunny
|
66°F |
8 mph
SW
|
|
Saturday Night
Jul 18
|
Mostly Cloudy
|
54°F |
7 mph
SW
|
|
Sunday
Jul 19
|
Mostly Cloudy
|
67°F |
5 to 8 mph
SW
|
|
Sunday Night
Jul 19
|
Cloudy
|
56°F |
7 mph
SW
|
|
Monday
Jul 20
|
Mostly Cloudy
|
68°F |
5 to 8 mph
SW
|
|
Monday Night
Jul 20
|
Mostly Cloudy
|
58°F |
3 to 7 mph
SW
|
|
Tuesday
Jul 21
|
Partly Sunny
|
72°F |
3 to 8 mph
SW
|
|
Tuesday Night
Jul 21
|
Mostly Cloudy
|
59°F |
8 mph
SW
|
|
Wednesday
Jul 22
|
Partly Sunny
|
70°F |
6 to 9 mph
WSW
|
|
Wednesday Night
Jul 22
|
Mostly Cloudy
|
57°F |
8 mph
SW
|
|
Thursday
Jul 23
|
Partly Sunny
|
69°F |
6 to 9 mph
SW
|
|
Thursday Night
Jul 23
|
Mostly Cloudy
|
56°F |
8 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Portola Valley.
