Newport Beach weather in September 2025

Expect 25°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Newport Beach in September based on long-term weather averages. There is usually 1 day with some rainfall and 6 mm of average monthly rainfall in September.

  • 25°C maximum daytime temperature in September in Newport Beach25
    25°C max day temperature
  • 9 hours of sunshine per day
  • 1 day with some rainfall in September in Newport Beach1
    1 day with some rainfall
  • 16°C minimum night-time temperature in September in Newport Beach16
    16°C min night temperature
  • 12 hours of daylight per day in September in Newport Beach12
    12 hours of daylight per day
  • Low heat & humidity in September in Newport BeachL
    Low heat & humidity
  • 6 mm monthly rainfall in September in Newport Beach6
    6 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in September in Newport Beach8
    8 (Very High) UV index
  • 20°C sea temperature in September in Newport Beach20
    20°C sea temperature

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The September weather guide for California (Newport Beach) 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 Newport Beach in September?

Daytime temperatures usually reach 25°C in Newport Beach in September with low heat and humidity, falling to 16°C at night.

How sunny is it in Newport Beach in September?

There are normally 9 hours of bright sunshine each day in Newport Beach in September - that's 73% of daylight hours.

How warm is the sea around Newport Beach in September?

The average sea temperature around Newport Beach in September is 20°C.

Does it ever rain in Newport Beach in September?

There is usually 1 day with some rain in Newport Beach in September and the average monthly rainfall is 6mm.

Newport Beach September sunrise & sunset times

Browse the sunrise and sunset times for Newport Beach in September 2025. Select a month to view Newport Beach sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:26 18:17
Monday, 15th September 2025 05:35 17:58
Tuesday, 30th September 2025 05:46 17:37

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