Every forecast across Maui Nui,
highway-clear.

Every Hawaii region shares one system — the same maps, the same live radar, the same climate record. Maui is a valley between two volcanoes, and the valley is a wind tunnel: the trades accelerate between Haleakalā and the West Maui Mountains hard enough to close the harbor while Lahaina sits still and dry in the lee. Upcountry runs twenty degrees cooler than the shore, Hāna takes the rain, and the same downslope wind that dries the leeward side drove the 2023 fire.