Black Sand Beach (Oneuli Beach) Weather Forecast
- 75
- 85
Partly Sunny
- 74
- 85
Partly Sunny
- 76
- 85
Mostly Sunny
- 76
- 86
Mostly Cloudy
- 76
- 85
Mostly Cloudy
- 75
- 84
Mostly Cloudy
Today 19 Sep South Maui/Upcountry
Mostly sunny in the morning then becoming partly sunny. Highs around 88 near the shore to around 75 near 4000 feet. Southwest Winds around 10 Mph shifting to the north in the afternoon.
Tonight 19 Sep South Maui/Upcountry
Partly cloudy in the evening then becoming mostly cloudy. Lows 68 to 74 near the shore to around 59 near 4000 feet. Northeast Winds 10 to 15 Mph.
Black Sand Beach (Oneuli Beach) Temperature Statistics
September Temperature
Kahului, Kahului Airport (17.4 miles)
Lowest 12 September, 2026
66.9 °FAverage September
79.8 °FHighest 15 September, 2026
91 °F
Climate (2021–2026)
Kahului, Kahului Airport (17.4 miles)
Average Low 2021–2026
69 °FAverage 2021–2026
76.7 °FAverage High 2021–2026
85.3 °F