Swell Matrix

Area Forecast Discussion

National Weather Service Honolulu Hi

954 am hst Wed aug 26 2026

Synopsis

A stable summertime trade wind pattern will persist through the weekend with moderate to breezy trade winds. A relatively dry pattern is expected today, with a slight increase of passing showers possible towards the end of the week.

Aviation

Moderate trades expected through the period. Low cigs locally below 2000 ft MSL in SHRA over windward and mauka slopes. MVFR conds in heavier SHRA, otherwise VFR prevails.

AIRMET Tango is in effect for mod low-level turb lee of terrain and may be needed for a few days.

Marine

Moderate to locally strong trades will persist as a broad high pressure remains far north of the state. A Small Craft Advisory (SCA) remains in effect for the typically windier waters around Maui County and the Big Island. Although winds may ease slightly Thursday as a weak trough passes far north of the state, it may not be enough to drop the SCA.

A long period south swell will begin to fill in today and peak Thursday into Friday. This swell could push surf towards advisory thresholds before slowly fading over the weekend.

Surf along east facing shores will remain rough and choppy due to persistent trade wind swell.

Surf along north facing shores will remain tiny to flat.

Watches, Warnings, Advisories

Small Craft Advisory until 6 AM HST Thursday for Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters- Maalaea Bay-Pailolo Channel.

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