September in Honolulu, HI: variable for golf — mixed conditions — check the live score. Best tee times: morning before noon for the most comfortable round.
| Average September Weather | |
|---|---|
| Avg daily high | 85°F |
| Avg daily low | 74°F |
| Rainy days | 15 / mo |
| Avg peak wind | 14 mph |
September in Honolulu ties August as the hottest month of the year at 85°F, and that heat has a measurable effect on how a round plays. Expect the ball to fly a club or two longer than you might at sea level in cooler climates — a useful edge off the tee, but one that can lead to overshot greens if you ignore the thermal math. The 11°F daily swing means morning tee times start humid and sticky near 74°F before climbing to their peak, so hydration management matters as much as club selection.
The 15 precipitation days earn September a tie for 3rd-driest month of the year, which sounds favorable until you understand what Hawaiian "rain days" often mean: brief passing showers that rarely last a full hole before the sun returns. Peak winds at 14 mph sit right at the upper edge of the moderate range, enough to affect shot shape on exposed coastal layouts but not enough to shut down a round.
Book morning rounds before 9 AM to stay ahead of peak afternoon heat at 85°F; September's 15 precipitation days trend toward brief afternoon showers, so early starters are also more likely to finish on dry fairways. See how conditions rate hour by hour on our playability scale.
September matches August almost exactly — same 85°F high and identical 14 mph peak wind, though August is fractionally windier at 14.9 mph, making September the marginally calmer option despite adding two more precipitation days. Moving into October, temperatures ease by 2°F to 83°F and winds drop further to 12.6 mph, but rain days climb by three, to 18, making October statistically wetter even if the conditions feel more temperate.
Climate normals show the long-term picture, but day-to-day weather varies. Check today's live golf weather score for Honolulu, HI for the current playability rating, hourly wind, temperature, and the recommended tee time window.
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At 85°F it is the hottest the island gets, which makes early morning tee times essential rather than optional. Rain occurs on 15 days in September, but most events are brief tropical showers rather than sustained downpours, and the month still ranks tied for 3rd-driest of the year at 15 precipitation days.
September's peak wind of 14 mph places it as the 4th-calmest month of the year, tied with May. That said, 14 mph is enough to influence ball flight on the exposed ridgeline and coastal courses common around Honolulu, so checking the morning trade-wind direction before choosing a target line is worthwhile.