Santa Monica weather in August 2025

Expect 82°F daytime maximum temperatures in the shade with on average 11 hours of sunshine per day in Santa Monica in August. Check more long-term weather averages for Santa Monica in August before you book your next holiday to California in 2025/2026.

  • 82°F maximum daytime temperature in August in Santa Monica82
    82°F max day temperature
  • 11 hours of sunshine per day
  • 1 day with some rainfall in August in Santa Monica1
    1 day with some rainfall
  • 63°F minimum night-time temperature in August in Santa Monica63
    63°F min night temperature
  • 13 hours of daylight per day in August in Santa Monica13
    13 hours of daylight per day
  • Low heat & humidity in August in Santa MonicaL
    Low heat & humidity
  • 0.1 inches monthly rainfall in August in Santa Monica0.1
    0.1 inches of monthly rainfall
  • UV (maximum) index 10 (Very High) in August in Santa Monica10
    10 (Very High) UV index
  • 66°F sea temperature in August in Santa Monica66
    66°F sea temperature

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The August weather guide for California (Santa Monica) 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)  |  Imperial (°F)

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More about California

How hot is it in Santa Monica in August?

Daytime temperatures usually reach 82°F in Santa Monica in August with low heat and humidity, falling to 63°F at night.

How sunny is it in Santa Monica in August?

There are normally 11 hours of bright sunshine each day in Santa Monica in August - that's 82% of daylight hours.

How warm is the sea around Santa Monica in August?

The average sea temperature around Santa Monica in August is 66°F.

Does it ever rain in Santa Monica in August?

There is usually 1 day with some rain in Santa Monica in August and the average monthly rainfall is 0.1 inches.

Santa Monica August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:06 18:54
Saturday, 16th August 2025 05:17 18:39
Sunday, 31st August 2025 05:27 18:20

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