Swell Matrix

Area Forecast Discussion

National Weather Service Honolulu Hi

810 pm hst Fri jul 3 2026

Synopsis

Moderate to breezy trade winds will prevail through the week as high pressure holds far north of the islands. Stable conditions will focus limited showers over windward and mauka areas through at least the middle of next week.

Aviation

Moderate to locally breezy trades will continue through the holiday weekend. Low clouds and showers will bring MVFR conditions to windward and mauka areas at times, with VFR conditions prevailing in leeward locales.

AIRMET Sierra remains in effect for mountain obscuration across windward sections of most islands. This AIRMET will likely continue through the night.

AIRMET Tango remains in effect for moderate low level turbulence over and downwind of terrain of all islands. This AIRMET will likely continue through the weekend.

Marine

Issued at 324 PM HST Fri Jul 3 2026 A high pressure ridge north of the Hawaiian Islands will keep trade winds blowing across the region into much of next week. A Small Craft Advisory (SCA) for the typical windy waters and channels around Maui County and the Big Island remains has been extended into Monday. Minor fluctuations in wind speeds may allow for brief periods of additional zones to fall into the SCA coverage area over the next several days.

A small, long period south swell hold through tonight keeping surf heights just below south shore summertime average surf heights. Another overlapping moderate, long period south- southwest swell will fill in Saturday, boosting surf heights to near High Surf Advisory levels Sunday and Monday. This swell will slowly fade from Tuesday through the middle of next week.

Surf along east facing shores will remain rough and choppy through the forecast period as moderate to locally strong trades hold. Surf along north facing shores will remain tiny into next week.

Watches, Warnings, Advisories

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

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