End of the drier season · Weather & things to do
Waikiki in September
Waikiki's warmest month brings highs averaging 83°F (28°C), lows of 78°F (25°C) and about 2.0 in (50 mm) of rain.
It scores 85/100 for comfort, 7th of 12, which makes it a solid shoulder-season month.
- Avg high
- 83°F (28°C)
- Avg low
- 78°F (25°C)
- Rain
- 2.0 in (50 mm)
- Humidity
- 74%
- Cloud cover
- 47%
- Daylight
- ~12 h 07 min
- Comfort score
- 85/100 · Great
What September feels like
Days are warm, averaging 83°F (28°C), easy weather for being outside from morning to evening.
Even at night it stays warm, around 78°F (25°C).
Rain is moderate at about 2.0 in (50 mm) for the month.
It's breezy, with average winds near 12 mph (5.5 m/s) at ground level.
Plan around September
September is shoulder season: good weather, a step below the best months (January and April – August).
- Comfort holds steady from August (86 → 85/100).
- Our Honolulu New Year's Eve route is planned for Dec 30 – Jan 1, a window set by the holiday season rather than the weather — September falls outside it.
What to pack for September
- Light, breathable clothes83°F afternoons
- Sunscreen, sunglasses and a hathigh UV on clear days
- Windproof shellaverage wind 12 mph
- Comfortable walking shoesmost picks involve some walking
What to do in Waikiki in September
With conditions on your side, the picks below favor time outside.
Waikiki Beach fireworks
Midnight fireworks launched from a barge off Waikiki, free to watch from the sand along Duke Kahanamoku Beach.
Why now September scores 85/100 for comfort, good conditions for being outside.
Royal Hawaiian Hotel
Pink 1927 Spanish-Moorish hotel on Waikiki Beach, with gardens and a beachfront bar open to visitors.
Why now Highs near 83°F and 2.0 in of monthly rain make this an easy outdoor pick.
Diamond Head State Monument
Volcanic crater above Waikiki with a steep 0.8-mile trail to old military bunkers on the rim.
Why now One to do outside while the weather is on your side.
Rainbow Drive-In
Plate-lunch drive-in near Kapiolani Park open since 1961, serving loco moco and mixed plates.
Nearby in September
- Kailua & Lanikai in September~11 mi · highs 81°F, 1.4 in rain · 1°C (2°F) cooler by day, about as wet
- Oahu in September~15 mi · highs 81°F, 2.0 in rain · 1°C (2°F) cooler by day, about as wet
- Maui in September~103 mi · highs 73°F, 1.5 in rain · 6°C (10°F) cooler by day, about as wet
- Big Island in September~185 mi · highs 56°F, 4.7 in rain · 15°C (27°F) cooler by day, wetter
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Waikiki in September: quick answers
Is September a good time to visit Waikiki?
It's a good shoulder-season choice, scoring 85/100 against a best of 90 in January and April – August. Expect highs of 83°F (28°C) and 2.0 in (50 mm) of rain.
How hot is Waikiki in September?
Average highs are 83°F (28°C) and average lows 78°F (25°C), making it the warmest month by daytime highs.
Does it rain a lot in Waikiki in September?
Not much: about 2.0 in (50 mm) of rain falls across September on average, the 5th-driest month of the year. The annual total is about 30.4 in (771 mm).
What should I pack for Waikiki in September?
Bring light, breathable clothes (83°F afternoons), sunscreen, sunglasses and a hat (high UV on clear days), windproof shell (average wind 12 mph) and comfortable walking shoes (most picks involve some walking).
Planning Waikiki in September?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.