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. Check more long-term weather averages for Newport Beach in September before you book your next holiday to California in 2025/2026.

  • 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

More about Newport Beach

Newport Beach by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for California

TUI: up to 7% off holidays booked online

  • Book online with TUI & save up to 7% on holidays
  • FREE child places available for select holidays
  • Pay £0 deposits with direct debit & spread the cost
Go to TUI deal >>

View all TUI offers

TUITUI deal finder

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)

Back to top

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

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^