Swell Matrix

Area Forecast Discussion

National Weather Service Honolulu Hi

853 pm hst Wed aug 26 2026

Synopsis

Moderate to locally breezy trades will remain in place through the remainder of the week. Stable and dry conditions will be the main theme the next several days. Typical summer-like, albeit infrequent, windward and/or upslope mauka quick-passing light showers.

Aviation

Issued at 410 PM HST Wed Aug 26 2026

Moderate trades expected through the period. Low cigs locally below 2000 ft MSL in SHRA over windward and mauka slopes, best chance through tonight. 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 410 PM HST Wed Aug 26 2026

Moderate to locally strong trades will persist as a broad high pressure remains far north of the state. A Small Craft Advisory for the typically windier waters around Maui County and the Big Island has been extended through Thursday.

A small, long period south swell will continue to fill in overnight and peak Thursday afternoon 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. A small, medium period east swell from Tropical Storm Iselle may fill in Friday, peak Saturday before slowly fading into early next week.

Surf along north facing shores will remain tiny to flat.

Watches, Warnings, Advisories

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

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