Typical September highs at Waimanalo Beach reach about 83°F, with reliable beach weather most of the year. Waimanalo Beach is located in Koolaupoko, Hawaii.
Koolaupoko, Hawaii · live parking & conditions · updated June 19, 2026
In a typical year September is the warmest month here, with highs near 83°F, and it's reliably beach weather most of the year. Tap Waimanalo Beach on the map for live surf, wind, water temperature, UV and tide times.
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