Santa Monica weather in August 2025

Expect daytime maximum temperatures of 28°C in Santa Monica, California in August based on long-term weather averages. There are 11 hours of sunshine per day on average.

  • 28°C maximum daytime temperature in August in Santa Monica28
    28°C max day temperature
  • 11 hours of sunshine per day
  • 1 day with some rainfall in August in Santa Monica1
    1 day with some rainfall
  • 17°C minimum night-time temperature in August in Santa Monica17
    17°C 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
  • 3 mm monthly rainfall in August in Santa Monica3
    3 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in August in Santa Monica10
    10 (Very High) UV index
  • 19°C sea temperature in August in Santa Monica19
    19°C 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 / mm)  |  Imperial (°F / inches)

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How hot is it in Santa Monica in August?

Daytime temperatures usually reach 28°C in Santa Monica in August with low heat and humidity, falling to 17°C 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 19°C.

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 3mm.

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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