Waimea Bay, Oahu weather in September 2025

Expect daytime maximum temperatures of 30°C in Waimea Bay, Oahu in September and high heat and humidity based on long-term weather averages. There are 9 hours of sunshine per day on average with typically 70 mm of rainfall in the month.

  • 30°C maximum daytime temperature in September in Waimea Bay, Oahu30
    30°C max day temperature
  • 9 hours of sunshine per day
  • 9 days with some rainfall in September in Waimea Bay, Oahu9
    9 days with some rainfall
  • 22°C minimum night-time temperature in September in Waimea Bay, Oahu22
    22°C min night temperature
  • 12 hours of daylight per day in September in Waimea Bay, Oahu12
    12 hours of daylight per day
  • High heat & humidity in September in Waimea Bay, OahuH
    High heat & humidity
  • 70 mm monthly rainfall in September in Waimea Bay, Oahu70
    70 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in September in Waimea Bay, Oahu11
    11 (Extreme) UV index
  • 27°C sea temperature in September in Waimea Bay, Oahu27
    27°C sea temperature

More about Waimea Bay, Oahu

Waimea Bay, Oahu by month

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

Recommended for Hawaii

Cosmos: Flight-inclusive tours from £999

  • Book tours with flights from just £999 per person
  • Pay low deposits from £150 per person to secure tour
  • Travel before 31st December 2025 (inclusive)
Go to Cosmos deal >>

Expires at 23:59 on Monday 31st Mar 2025 · View all Cosmos offers

The September weather guide for Hawaii (Waimea Bay, Oahu) 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 the USA

How hot is it in Waimea Bay, Oahu in September?

Daytime temperatures usually reach 30°C in Waimea Bay, Oahu in September with high heat and humidity, falling to 22°C at night.

How sunny is it in Waimea Bay, Oahu in September?

There are normally 9 hours of bright sunshine each day in Waimea Bay, Oahu in September - that's 73% of daylight hours.

How warm is the sea around Waimea Bay, Oahu in September?

The average sea temperature around Waimea Bay, Oahu in September is 27°C.

Does it rain in Waimea Bay, Oahu in September?

There are usually 9 days with some rain in Waimea Bay, Oahu in September and the average monthly rainfall is 70mm.

Waimea Bay, Oahu September sunrise & sunset times

Browse the sunrise and sunset times for Waimea Bay, Oahu in September 2025. Select a month to view Waimea Bay, Oahu sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:16 18:48
Monday, 15th September 2025 06:19 18:35
Tuesday, 30th September 2025 06:23 18:20

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^