Oahu in September
Weather, crowds, and prices — and whether September is your month.
Quick answer · Great value
The insider window: summer seas, thinner crowds. Expect highs around 88°F, very little rain, moderate, and good value.
88/73°F
Typical high / low
Very little rain
Rain
Moderate
Crowds
Good value
Prices
The bigger picture for Oahu
- Best overall: April-May and September-October for the best balance.
- Best value: September-October: summer-calm water, shoulder prices.
- Watch out for: Late December-early January: peak prices; big winter surf closes North Shore swimming.
Oahu month by month
| Month | High/Low | Rain | Crowds | Prices |
|---|---|---|---|---|
| January | 80/66° | Regular showers | Peak crowds | Peak prices |
| February | 80/65° | Regular showers | Busy | Peak prices |
| March | 81/67° | Regular showers | Peak crowds | Peak prices |
| April | 83/68° | Occasional showers | Busy | Above average |
| May | 85/70° | Occasional showers | Moderate | Good value |
| June | 87/72° | Very little rain | Busy | Above average |
| July | 88/73° | Very little rain | Peak crowds | Peak prices |
| August | 89/74° | Very little rain | Peak crowds | Above average |
| September ← | 88/73° | Very little rain | Moderate | Good value |
| October | 87/72° | Occasional showers | Moderate | Good value |
| November | 84/70° | Regular showers | Moderate | Good value |
| December | 81/67° | Regular showers | Peak crowds | Peak prices |
Planning a September trip?
Browse the Oahu guides — the full destination profile, all-inclusive resorts, family trips, and honeymoons — or skip the research entirely.
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