Honolulu, Oahu weather in August 2025

Q: How hot is it in Honolulu, Oahu in August?

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

Q: How sunny is it in Honolulu, Oahu in August?

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

Q: How warm is the sea around Honolulu, Oahu in August?

The average sea temperature around Honolulu, Oahu in August is 27°C.

Q: Does it rain in Honolulu, Oahu in August?

There are usually 7 days with some rain in Honolulu, Oahu in August and the average monthly rainfall is 14mm.

Q: What is the chance of a cyclone in Honolulu, Oahu in August?

On average less than 1 day in August in Honolulu, Oahu is likely to be affected by the passage of one or more tropical storms.

Expect 86°F daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Honolulu, Oahu in August. Check more long-term weather averages for Honolulu, Oahu in August before you book your next holiday to Hawaii in 2025/2026.

86
86°F max day temperature
9
9 hours of sunshine per day
7
7 days with some rainfall
72
72°F min night temperature
13
13 hours of daylight per day
H
High heat & humidity
0.6
0.6 inches of monthly rainfall
11
11+ (Extreme) UV index
81
81°F sea temperature

More about Honolulu, Oahu

Honolulu, Oahu by month

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

Recommended for Hawaii

Marriott discount code: up to 20% off long hotel stays

Discount Code

Save up to 20% when you book long stays with Marriott
20% off - 4-6 nights, 15% off 3 nights
Book participating hotels in Europe, the Middle East & Africa

Show discount code

******UK8

Redeem Marriott discount code >>

View all Marriott offers

The August weather guide for Hawaii (Honolulu, 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) | Imperial (°F)

More about the USA

How hot is it in Honolulu, Oahu in August?

Daytime temperatures usually reach 86°F in Honolulu, Oahu in August with high heat and humidity, falling to 72°F at night.

How sunny is it in Honolulu, Oahu in August?

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

How warm is the sea around Honolulu, Oahu in August?

The average sea temperature around Honolulu, Oahu in August is 81°F.

Does it rain in Honolulu, Oahu in August?

There are usually 7 days with some rain in Honolulu, Oahu in August and the average monthly rainfall is 0.6 inches.

What is the chance of a hurricane in Honolulu, Oahu in August?

On average less than 1 day in August in Honolulu, Oahu is likely to be affected by the passage of one or more tropical storms.

Honolulu, Oahu August sunrise & sunset times

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

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

Date	Sunrise times	Sunset times
Friday, 1st August 2025	06:05	19:10
Saturday, 16th August 2025	06:10	19:00
Sunday, 31st August 2025	06:15	18:48

Be inspired

Get your weekly fix of holiday inspiration from some of the world's best travel writers plus save on your next trip with the latest exclusive offers

We promise not to share your details

Popular travel offers

Hawaii - quick facts
Flight time^✝	18 hours
Time difference	UK -10 hours
Language(s)	English
Currency	US Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes
Why visit?	Beaches Nature Nightlife
Tourist info	Hawaii Tourism Authority