After a dry day Monday, we will see an increase in both moisture and trade winds Tuesday into Wednesday. This will bring an increase in showers, mainly windward and mauka. Trades will continue at moderate to occasionally breezy levels into the weekend, with the potential for a drier period Friday and Saturday.
Moderate to locally breezy trade winds expected through midweek. A trough east of the state moving westward will increase SHRA across most sites through Wednesday. MVFR conds can be expected as the trough passes through.
No AIRMET's are currently in effect, however AIRMET Sierra for mtn obsc might be needed overnight through tomorrow as the trough moves through.
Issued at 336 PM HST Mon Jun 22 2026
A weak high pressure ridge will remain nearly stationary north of the waters maintaining gentle to locally fresh trade winds through Tuesday. High pressure to the far north-northeast will strengthen by mid-week, causing easterly trade winds to gradually strengthen to moderate to locally strong levels. A Small Craft Advisory (SCA) may need to be issued for the windier waters and channels around Maui County and the Big Island as early as Tuesday night with the east to west passage of a low-level trough over the islands contributing to enhanced winds behind the feature. The trough will also be accompanied by an increase in shower activity Tuesday and Wednesday. SCA conditions are then likely to continue through the end of the week.
A series of small to moderate, medium to long period south swells will keep surf along south-facing shores near seasonal average through the forecast period. A moderate, long-period swell (nearly 3 feet, 15 seconds on Buoy 2) is giving a slight boost to south shore surf this afternoon which is expected to continue through tonight before fading on Tuesday. Another boost in south swell is expected Wednesday night into Thursday below High Surf Advisory levels.
Surf along east-facing shores will remain small due to the lack of trade wind energy upstream of the islands through tonight. Easterly wind wave looks to increase Tuesday into the end of the week, reaching moderate levels as trade winds increase. Surf along north-facing shores will remain flat to tiny through the forecast period with a potential bump of tiny background energy midweek into Thursday.
None.
