How warm is Oʻahu in August?

Typical highs are about 88°F and the sea is about 81°F. That is warm enough for long swims without a wetsuit.

Is August hurricane season in Oʻahu?

August falls in the tropical storm season; the typical risk on a given day is low. It peaks in September. Travel insurance and flexible bookings help.

How crowded is Oʻahu in August?

Typically very busy, around Mexico summer vacation and US summer school break. The quietest months are usually September and October.

Oʻahu in August

August is a good month for Oʻahu: a typical day grades A, the 6th best of the 12 months. Expect highs near 88°F, water around 81°F and about a 11% chance of rain on a given day. Beaches are typically very busy (Mexico summer vacation and US summer school break).

Typical dayA6th of 12 months

Highs / water88°FSea 81°F

Rain chance11%on a given day

Waves–typical

CrowdsVery busyMexico summer vacation

Storm riskLowhurricane season

Oʻahu month by month

Typical grade and high for each month. Higher is better: A+ to F.

July: A · August: A · September: A. The best months are usually September, October and November, and the weakest are March and December.

Best beaches in Oʻahu in August

Resorts with the best typical August, and their grades for the next few days.

Beach	Typical Aug	This week
Hilton Hawaiian Village	A	SatA-SunBMonBTueA-WedA-
Four Seasons O'ahu at Ko Olina	A	SatA-SunAMonATueA-WedA-
Barbers Point Beach Cottages	A	SatA-SunAMonATueA-WedA-
White Sands Hotel	A	SatA-SunBMonBTueA-WedA-
Ka Laʻi Waikiki Beach, LXR Hotels & Resorts	A	SatA-SunBMonBTueA-WedA-
Wayfinder Waikiki	A	SatA-SunBMonBTueA-WedA-
Sheraton Waikiki	A	SatA-SunBMonBTueA-WedA-
Sheraton Princess Kaiulani Hotel	A	SatA-SunBMonBTueA-WedA-

Grades for the next few days from Veabird's beach forecast, updated Oct 3, 18:00 UTC. Higher is better: A+ to F.

How it compares

Oʻahu is among the best-graded beach destinations in August. Every destination in August.

Questions

Is August a good time to visit Oʻahu?: August is a good month for Oʻahu: a typical day grades A, the 6th best of the 12 months. Expect highs near 88°F, water around 81°F and about a 11% chance of rain on a given day. Beaches are typically very busy (Mexico summer vacation and US summer school break).
How warm is Oʻahu in August?: Typical highs are about 88°F and the sea is about 81°F. That is warm enough for long swims without a wetsuit.
Is August hurricane season in Oʻahu?: August falls in the tropical storm season; the typical risk on a given day is low. It peaks in September. Travel insurance and flexible bookings help.
How crowded is Oʻahu in August?: Typically very busy, around Mexico summer vacation and US summer school break. The quietest months are usually September and October.

Plan it

Typical-month numbers from Veabird's year-ahead outlook for the 17 resorts here (median resort): 6 years of ERA5 climate normals, the seasonal pattern of the Atlantic sargassum belt, holiday crowd calendars and historical storm tracks. Any given year can differ; check the 16-day forecast before you go.