A slightly unstable and somewhat wet trade wind flow will continue over the next few days with brief downpours possible. An increasingly stable, windy trade wind flow will develop during the second half of this week.
Issued at 830 PM HST Sun May 17 2026
Moderate to locally breezy trades expected for the next couple days. Low cigs and SHRA should primarily impact windward and mauka locations with some limited spillover to leeward areas. Isol IFR and MVFR conds possible in heavier SHRA, otherwise VFR prevails.
AIRMET Sierra is in effect for mtn obsc for Kauai, Oahu, Maui and windward sections of the Big Island.
Issued at 830 PM HST Sun May 17 2026
The pressure gradient back from a surface high centered 1,400 nm northeast of the islands remains tight enough to support moderate to locally fresh trades the next few days. This anchored high will strengthen and expand past mid week. The resultant tightening gradient will produce fresh to locally strong trades during the later half of the week.
A small, medium period north northwest (320-330 degree) swell and associated north-facing surf will continue to slowly decline through early Monday morning. A small size, short to medium period north northwest bump in swell late Monday will provide an additional foot or two upon north-facing shore surf later in the day through Tuesday.
The arrival of a couple of medium to long period south southwest (200 degree) swells will maintain near summertime average surf along southern facing shores through most of the week. Strengthening trades later this week will keep short period, elevated wind wave chop alive through the week.
Water levels peaking between 2.5 to 3.0 ft MLLW during high tides the next couple of days will result in some minor overwash within low lying coastal areas.
None.
