Strong high pressure to the north will slowly weaken tonight through the next several days. As a result, the windy trade winds will remain hazardous tonight before gradually decreasing back down to normal levels tomorrow into next week. Showers will favor windward and mountain areas, staying on the lighter side through the next few days before potentially increasing slightly during the middle of next week.
Breezy to windy trade winds will prevail overnight. Occasional MVFR ceilings and visibilities will occasionally occur within SHRA primarily across windward and upslope mauka exposures.
AIRMET Tango is in effect for moderate low level turbulence over and immediately S through W of mountainous terrain of all Hawaiian Islands as a result of strengthened trade winds. Evening and early morning lowering ceilings over Kauai and Oahu's upper terrain has an AIRMET SIERRA in effect for mountain obscuration.
Issued at 326 PM HST Sat Aug 1 2026
Strong surface high pressure north of the state will maintain strong to locally near gale easterly trade winds across all coastal waters through tonight. The Small Craft Advisory (SCA) is in effect for all coastal zones through tonight for winds and also seas potentially exceeding 10 feet. Overnight as winds begin to trend down, the SCA has been trimmed back to just the windier waters and channels around Maui County and the Big Island through Sunday. The combination of a strong mid- latitude trough and Tropical Storm Genevieve passing far northeast of the islands induces a weakness in the ridge which will then keep trade winds more moderate to locally fresh for the first half of next week.
Surf along south facing shores will stay below seasonal averages as consecutive small south to southwest medium period swells impact the shorelines through the middle of next week.
East facing shores will remain rough and choppy through tonight due to a combination of strong trade winds and a small, medium period easterly swell generated from Tropical Storm Genevieve that will linger into early next week. By early next week as trade winds gradually weaken, surf will also decline slightly.
Surf along north facing shores will remain flat to tiny through the forecast period except for areas exposed to the easterly trade wrap.
Wind Advisory until 6 AM HST Sunday for Big Island Interior-Big Island North-Big Island South-Big Island Southeast-Kahoolawe- Kauai South-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 AM HST Sunday for Big Island Windward Waters-Kaiwi Channel-Kauai Channel-Kauai Leeward Waters- Kauai Northwest Waters-Kauai Windward Waters-Maui County Leeward Waters-Maui County Windward Waters-Oahu Leeward Waters-Oahu Windward Waters.
Small Craft Advisory until 6 PM HST Sunday for Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters- Maalaea Bay-Pailolo Channel.
