Newport Beach Weather in September

What's the weather like in Newport Beach (California) in September 2025?

The climate in Newport Beach during September can be summarized as warm, humid and very dry.

September is in the fall / autumn in Newport Beach and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a muggy 25°C (76°F), whilst at night 17°C (62°F) is normal.

Newport Beach weather averages (imperial / metric)
Daytime temperature 24.6°C 76.2°F
Nightly temperature 16.5°C 61.6°F
Average temperature 20.5°C 68.9°F
Daily sunshine 9.8 hrs
Avg rainfall 6 mm 0.3 ins
Rainy days 1 days
Sea temperature 20.4°C 68.8°F
Humidity 70%
Windspeed 12.2kph 8 mph

On average September is the 6th driest month of the year in Newport Beach with around 6mm 0.3 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 9.8 hours of sunshine per day.

September temperatures in Newport Beach

Newport Beach average temperature in September

September rainfall

Newport Beach average rain in September

September hourly sunshine

Newport Beach average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Newport Beach in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Newport Beach weather stats

Newport Beach weather statistics
Hottest month: August 24°C 75.2°F
Driest month: July 1mm 0ins
Sunniest month: August 11.5hrs
Coldest month: January 18°C 64.4°F
Wettest month: January 64mm 2.5ins
Map showing location of Newport Beach (33.61891, -117.92895) Newport Beach map pin © Google

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