Swell Matrix

Area Forecast Discussion

National Weather Service Honolulu Hi

853 pm hst Tue aug 25 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 over the next few days, with a slight increase of passing showers possible towards the end of the week.

Aviation

Moderate trades expected through the period. Low cigs and SHRA possible 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

Issued at 332 PM HST Tue Aug 25 2026

Moderate to locally strong trades will persists a broad high pressure remains far north of the state. A Small Craft Advisory remains in effect over typically windier waters around Maui County and the Big Island.

Surf along south facing shores will remain below summer average through tonight as a small medium period south swell slowly fades and a small, long period south southwest swell fills in. A slightly larger, long period south swell will fill in Wednesday 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 PM HST Wednesday for Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters- Maalaea Bay-Pailolo Channel.

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