Oahu Climate and Weather
Oahu experiences constant warm, balmy weather all year round, its tropical climate subject to variations caused by different elevations and geographic exposure rather than seasons. Temperatures vary little throughout the year, averaging between 66ºF (19ºC) and 89°F (32ºC). The southern side of the island, including Honolulu and Waikiki, is drier than the leeward side, as the rain-bearing trade winds are blocked by the mountain ranges. The wet season in Oahu is from October to March, and averages 7 to 10 rainy days per month. The water temperature in Oahu is also warm year round, staying between 77ºF (25ºC) and 81ºF (27ºC).