Kauai's generally wonderful weather is dominated by the trade winds. These northeasterly breezes flow off a large, persistent high-pressure cell: the Pacific High.
What is the windiest part of Hawaii?
Maui is the windiest island of Hawaii. That is why it is also one of the best wind surfing and kite surfing spots in the world. Maui's dominant northeast tradewinds bring beautiful down the line waves sailing up and down Maui's central north shore, from Ho'okipa downwind to Kanaha.