Oʻahu in September
September is one of the best months to visit Oʻahu: a typical day grades A, the 2nd best of the 12 months. Expect highs near 88°F, water around 81°F and about a 13% chance of rain on a given day. Beaches are typically busy (Labor Day weekend and Mexican Independence Day). It is hurricane season, with moderate storm risk.
Oʻahu month by month
Typical grade and high for each month. Higher is better: A+ to F.
- JanA-80°F
- FebA-80°F
- MarA-81°F
- AprA82°F
- MayA84°F
- JunA86°F
- JulA87°F
- AugA88°F
- SepA88°F
- OctA86°F
- NovA84°F
- DecA-81°F
August: A · September: A · October: A. The best months are usually September, October and November, and the weakest are March and December.
Best beaches in Oʻahu in September
Resorts with the best typical September, and their grades for the next few days.
| Beach | Typical Sep | 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 September. Every destination in September.
Questions
- Is September a good time to visit Oʻahu?
- September is one of the best months to visit Oʻahu: a typical day grades A, the 2nd best of the 12 months. Expect highs near 88°F, water around 81°F and about a 13% chance of rain on a given day. Beaches are typically busy (Labor Day weekend and Mexican Independence Day). It is hurricane season, with moderate storm risk.
- How warm is Oʻahu in September?
- Typical highs are about 88°F and the sea is about 81°F. That is warm enough for long swims without a wetsuit.
- Is September hurricane season in Oʻahu?
- September falls in the tropical storm season; the typical risk on a given day is moderate. It peaks in September. Travel insurance and flexible bookings help.
- How crowded is Oʻahu in September?
- Typically busy, around Labor Day weekend and Mexican Independence Day. 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.