Moderate trades weaken giving way to land and sea breezes through early this week. Increasing moisture will move up the island chain from the southeast through the ealry portion of the week resulting in increased shower coverage over island interiors. Trades return late Wednesday and continue through the forecast period.
Light trade winds will allow sea breezes to develop in some areas today. Low clouds and showers possible over inland and leeward areas by midday.
AIRMET Sierra is in effect for tempo mtn obsc above 2500 feet for windward Oahu, windward Maui and windward/southeast Big Island. Possible AIRMET Sierra for mtn obsc due to increasing clouds over leeward areas.
Issued at 308 AM HST Sun May 31 2026 The trades will ease into the light to moderate range today as a front weakens the ridge north of the islands. The front will dissipate and the ridge will gradually strengthen north of the state Monday and Tuesday, allowing the trades to gradually strengthen back to moderate and fresh levels. High pressure north of the islands will strengthen further by the middle to latter part of next week, bringing fresh to strong trades back to the waters, with Small Craft Advisories likely being required for the typically windy waters around Maui and the Big Island.
The current long-period south swell will hold at advisory levels today, then gradually lower tonight and Monday as forerunners from a new long-period south swell begin to arrive. Surf is expected to briefly dip below advisory levels tonight and Monday, but will likely return to advisory levels Tuesday through Thursday, potentially peaking close to warning levels on Wednesday.
A combination of advisory-level surf and water levels hovering slightly above predicted levels could lead to some wave runup issues during this afternoons high tide cycle, with water sweeping across areas of beaches that typically remain dry. Water levels will gradually lower through the rest of the week.
Surf along north-facing shores will remain small through Monday, then trend slightly higher Tuesday through Friday as a pair of overlapping small north-northwest swells move through. North shore surf will drop back to nearly flat levels next weekend.
East shore surf will remain well below normal through Tuesday due to lack of trade winds over and upstream of the state. Surf will trend upward Wednesday and Thursday and hold close to seasonal levels Friday through next weekend.
High Surf Advisory until 6 PM HST this evening for south facing shores of all Hawaiian islands.
