A strong surface high will continue to build north of the state today, bringing windy trade winds through Saturday afternoon. A drier and more stable air mass will also settle in over the state. Trades will ease back to more typical summertime breezy levels Sunday into early next week as the high weakens. Isolated to scattered showers will mainly affect windward locations with dry weather expected for leeward areas.
Issued at 345 AM HST Fri Jul 31 2026 Moderate to breezy trade winds will prevail through the period. Occasional MVFR ceilings and possible lowered visibilities over windward and mauka areas within brief, heavier showers.
No AIRMETs are currently in effect. Strengthening lower level trades will warrant an AIRMET TANGO across and immediately S through W of high terrain later today.
Issued at 345 AM HST Fri Jul 31 2026 Strong trades develop across all nearshore marine zones this afternoon as governing high pressure strengthens and migrates south toward the islands. The existing Small Craft Advisory has therefore been further expanded to capture all nearshore waters.
Fading S swell will be followed by the occasional small, medium period pulse of energy out of the southerly quadrant during the next several days. This will maintain surf slightly below the seasonal average.
Small long period forerunners emanating from Hurricane Genevieve in the East Pac have registered on offshore NDBC buoys with some indication of this energy at the nearshore Hilo CDIP buoy as well. This swell will remain small, on the order of a couple feet, as it peaks Friday into Friday night and then fades heading into early next week. This swell will be mixed with building trade wind swell and wind wave action as strong trades become established. N shores remain tiny to flat as do W facing shores except for locales exposed to medium period S swell.
Wind Advisory until 6 PM HST Saturday for Big Island Interior- Big Island North-Big Island South-Big Island Southeast-Kahoolawe- Kohala-Koolau Leeward-Lanai Leeward-Lanai Mauka-Lanai Windward- Maui Central Valley North-Maui Central Valley South-Maui Leeward West-Molokai Leeward South-Molokai North-Molokai West-South Haleakala-Waianae Mountains.
Small Craft Advisory until 6 PM HST Saturday for Kauai Channel- Kauai Leeward Waters-Kauai Northwest Waters-Kauai Windward Waters-Oahu Leeward Waters-Oahu Windward Waters.
Small Craft Advisory until 6 PM HST Saturday for Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters- Big Island Windward Waters-Kaiwi Channel-Maalaea Bay-Maui County Leeward Waters-Maui County Windward Waters-Pailolo Channel.
