Portola Valley, California | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast night icon
    Night
    Partly Cloudy
    49°
    Saturday 5/11
    Forecast night icon
    49°
    Partly Cloudy
    Hourly
    Night Details
    Partly cloudy late in the evening then becoming mostly cloudy. Lows in the mid 50s. West winds 5 to 15 mph.
  • Forecast day icon
    Sunday
    Mostly Cloudy
    80°
    Forecast night icon
    Night
    Partly Cloudy
    46°
    Sunday 5/12
    Day
    80°
    Mostly Cloudy
    Forecast day icon
    Night
    46°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy in the morning then becoming sunny. Highs in the 60s to upper 70s. West winds 5 to 10 mph. . . Becoming northwest 10 to 20 mph in the afternoon.
    Night Details
    Mostly clear in the evening then becoming partly cloudy. Lows in the lower 50s. West winds 10 to 20 mph. . . Becoming 5 to 10 mph after midnight.
  • Forecast day icon
    Monday
    Mostly Cloudy
    75°
    Forecast night icon
    Night
    Mostly Clear
    45°
    Monday 5/13
    Day
    75°
    Mostly Cloudy
    Forecast day icon
    Night
    45°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy in the morning then becoming sunny. Highs in the 60s to mid 70s. West winds 5 to 15 mph.
    Night Details
    Mostly clear. Lows in the lower 50s. West winds 10 to 20 mph. . . Becoming southwest 5 to 10 mph after midnight.
  • Forecast day icon
    Tuesday
    Mostly Cloudy
    76°
    Forecast night icon
    Night
    Mostly Clear
    47°
    Tuesday 5/14
    Day
    76°
    Mostly Cloudy
    Forecast day icon
    Night
    47°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy in the morning then becoming sunny. Highs in the 60s to upper 70s.
    Night Details
    Mostly clear. Lows in the mid 50s. Highs in the 60s to upper 70s.
  • Forecast day icon
    Wednesday
    Mostly Sunny
    77°
    Forecast night icon
    Night
    Mostly Clear
    48°
    Wednesday 5/15
    Day
    77°
    Mostly Sunny
    Forecast day icon
    Night
    48°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly clear. Lows in the mid 50s. Highs in the 60s to upper 70s.
    Night Details
    Mostly clear. Lows in the mid 50s. Highs in the 60s to upper 70s.
  • Forecast day icon
    Thursday
    Mostly Sunny
    77°
    Forecast night icon
    Night
    Mostly Clear
    48°
    Thursday 5/16
    Day
    77°
    Mostly Sunny
    Forecast day icon
    Night
    48°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly clear. Lows in the mid 50s. Highs in the 60s to upper 70s.
    Night Details
    Mostly clear. Lows in the mid 50s. Highs in the 60s to upper 70s.
  • Forecast day icon
    Friday
    Mostly Sunny
    73°
    Forecast night icon
    Night
    Mostly Clear
    48°
    Friday 5/17
    Day
    73°
    Mostly Sunny
    Forecast day icon
    Night
    48°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly clear. Lows in the mid 50s. Highs in the 60s to upper 70s.
    Night Details
    Mostly clear. Lows in the mid 50s. Highs in the 60s to upper 70s.
  • Forecast day icon
    Saturday
    Partly Cloudy
    75°
    Forecast night icon
    Night
    Partly Cloudy
    47°
    Saturday 5/18
    Day
    75°
    Partly Cloudy
    Forecast day icon
    Night
    47°
    Partly Cloudy
    Forecast night icon
    Day Details
    Partly cloudy in the morning then becoming sunny. Highs in the upper 60s to mid 70s.
    Night Details
    Partly cloudy. Low temperature around 47F. Dew point will be around 51F with an average humidity of 89%. Winds will be 4 mph from the SW.
  • Forecast day icon
    Sunday
    Mostly Cloudy
    71°
    Forecast night icon
    Night
    Partly Cloudy
    46°
    Sunday 5/19
    Day
    71°
    Mostly Cloudy
    Forecast day icon
    Night
    46°
    Partly Cloudy
    Forecast night icon
    Day Details
    Mostly cloudy. High temperature around 71F. Dew point will be around 54F with an average humidity of 71%. Winds will be 4 mph from the W.
    Night Details
    Partly cloudy. Low temperature around 46F. Dew point will be around 49F with an average humidity of 87%. Winds will be 4 mph from the W.
  • Forecast day icon
    Monday
    Mostly Cloudy
    72°
    Forecast night icon
    Night
    Clear
    45°
    Monday 5/20
    Day
    72°
    Mostly Cloudy
    Forecast day icon
    Night
    45°
    Clear
    Forecast night icon
    Day Details
    Mostly cloudy. High temperature around 72F. Dew point will be around 52F with an average humidity of 67%. Winds will be 6 mph from the W.
    Night Details
    Clear. Low temperature around 45F. Dew point will be around 48F with an average humidity of 85%. Winds will be 6 mph from the W.