Breezy trades will gradually weaken to moderate speeds Wednesday through the rest of the week, becoming relatively light this weekend. Isolated to scattered showers will continue to focus over windward and mauka areas through Wednesday. Thursday, lighter winds will support sea breezes each afternoon, increasing chances of clouds and showers over mauka and interior areas with land breezes clearing these clouds and decreasing chances of showers overnight and early morning.
High pressure north of the islands will continue to sustain moderate to breezy trade winds through tonight. Showers will focus over windward and mountain areas, occasionally making it to leeward areas. Shower coverage will generally be higher during the night time and early morning hours. MVFR conditions are expected within showers, while VFR prevails elsewhere.
AIRMET Tango is in effect for mechanical turbulence downwind of the mountains due to breezy trade winds, and this is expected to continue through Wednesday.
Issued at 300 AM HST Tue Jun 9 2026
A high pressure far northeast of the islands with an associated ridge stretching west about 600 nm north of Kauai, is driving fresh trades across the area. This high will be pushed eastward over the next several days, and its associated ridge will be displaced southward, resulting in the slow decrease in local trades. A Small Craft Advisory (SCA) is in effect for the typically windy waters around Big Island and Maui until 6PM tonight. Trades should be down into the moderate to locally fresh range and will continue to fall into the gentle to moderate category by Friday and may hold into the weekend.
A series of southern hemisphere swells will continue through the week with the largest due to arrive this weekend. Currently, a building long-period south swell is overlapping a fading medium- period swell. The bulk of the new swell energy was aimed east of Hawaii, which still leaves some uncertainty in resulting surf heights through this evening. Expect south shore surf to be around seasonal averages today, and then slowly declining Wednesday, followed by a smaller pulse of south-southwest swell Thursday and Friday.
A much larger south-southwest swell will arrive Saturday night and Sunday. A storm just southeast of New Zealand is producing a fetch of seas in excess of 40 feet aimed at Hawaii, and there is growing confidence that south shore surf will well exceed High Surf Advisory levels during the peak Sunday into early next week, with High Surf Warning conditions possible. This swell will coincide with the peak monthly tides and will likely lead to significant wave runup and impacts to coastal infrastructure.
Small west-northwest is possible over the next few days, while rough east shore surf slowly declines below seasonal averages.
Small Craft Advisory until 6 PM HST this evening for Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters- Maalaea Bay-Pailolo Channel.
