Big Sur weather in August 2025

Expect 23°C daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Big Sur in August. Check more long-term weather averages for Big Sur in August before you book your next holiday to California in 2025/2026.

  • 23°C maximum daytime temperature in August in Big Sur23
    23°C max day temperature
  • 10 hours of sunshine per day
  • 2 days with some rainfall in August in Big Sur2
    2 days with some rainfall
  • 10°C minimum night-time temperature in August in Big Sur10
    10°C min night temperature
  • 13 hours of daylight per day in August in Big Sur13
    13 hours of daylight per day
  • No heat & humidity in August in Big Sur0
    No heat & humidity
  • 5 mm monthly rainfall in August in Big Sur5
    5 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in August in Big Sur9
    9 (Very High) UV index
  • 15°C sea temperature in August in Big Sur15
    15°C sea temperature

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The August weather guide for California (Big Sur) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about California

How hot is it in Big Sur in August?

Daytime temperatures usually reach 23°C in Big Sur in August, falling to 10°C at night.

How sunny is it in Big Sur in August?

There are normally 10 hours of bright sunshine each day in Big Sur in August - that's 71% of daylight hours.

How warm is the sea around Big Sur in August?

The average sea temperature around Big Sur in August is 15°C.

Does it ever rain in Big Sur in August?

There are usually 2 days with some rain in Big Sur in August and the average monthly rainfall is 5mm.

Big Sur August sunrise & sunset times

Browse the sunrise and sunset times for Big Sur in August 2025. Select a month to view Big Sur sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:14 19:12
Saturday, 16th August 2025 05:26 18:56
Sunday, 31st August 2025 05:38 18:36

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