Moderate to locally breezy trade winds will continue through Monday before gradually decreasing by midweek. Another round of moisture will move in from the east by next Tuesday, increasing shower activity across the state.
Issued at 434 AM HST Sun Sep 20 2026 Moderate to breezy trades will continue for the next couple of days. Embedded showers will primarily impact windward and mountain areas. Kona slopes of the Big Island could also see some afternoon showers today. Brief and isolated MVFR conditions are possible within showers, but VFR should prevail.
AIRMET Tango remains in effect for moderate low-level turbulence downwind of island terrain due to the breezy trade winds.
Issued at 434 AM HST Sun Sep 20 2026 The gradient between weak high pressure north of the islands and pressure falls south of the islands is resulting in locally breezy trade winds across the region, confirmed by a late evening advanced scatterometer pass over the area. Therefore, a Small Craft Advisory remains in effect through Monday afternoon for the typical windy channels and waters of Maui County and the Big Island. After a brief lull in trades, they will restrengthen again during the latter portion of the week as a trough or potential weak tropical disturbance moves south of the islands. Shower coverage will also increase, along with isolated thunderstorm potential, particularly across the eastern waters.
Surf along south facing shores will remain above average through early this week as a long period SSW swell holds relatively steady for the next couple of days. This swell will then fade during the middle of the week, but will be followed by another small southerly swell shortly thereafter. West facing shores will experience a bit of the southerly wrap.
Breezy trade winds will maintain moderate surf along east facing shores for the next several days. Surf along north facing shores will remain flat to tiny through Monday, but could see a bump Tuesday into Wednesday. A small, long period west northwest swell will then build later in the week, increasing surf along north and west facing shores a bit more Friday into next weekend.
Small Craft Advisory until 6 PM HST Monday for Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters- Maalaea Bay-Pailolo Channel.
