Light to moderate east northeasterly flow will prevail for the rest of today and bring scattered clouds and isolated showers to mainly windward areas. Localized afternoon sea breezes may help initiate a few showers over select leeward mountain slopes. Surface high pressure will build north of the area Monday through midweek and help strengthen trade winds to moderate to breezy levels. A weak surface trough is forecast to move through the area by midweek which could help enhance trade wind showers.
Updated at 952 AM HST Sun Jun 21 2026 Light to moderate easterly trades will persist through Monday, with clouds and showers favoring windward and mauka locations through the early morning hours. Expect cloud buildups over leeward and interior sections during the afternoon hours where localized sea breezes form. No AIRMETs are anticipated today or tonight, with only brief periods with MVFR CIGs/VSBYs possible in showers.
Issued at 359 AM HST Sun Jun 21 2026 A weak high pressure ridge north of the Hawaiian Islands will strengthen by the middle of this week, increasing trade winds and wind driven seas. A low level trough will move through the Hawaii region, from Tuesday through Wednesday, increasing shower activity from east to west.
Several overlapping small medium and long period south swells will continue to pass through the region this week. This south swell energy will keep south shore surf elevated into next weekend.
Surf along west, north and east shores will remain small due to lack of swell energy and lighter trade winds. Increasing trade winds later this week will raise surf heights slightly along all exposed east facing shores.
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