Swell Matrix

Area Forecast Discussion

National Weather Service Honolulu Hi

822 pm hst Mon jul 6 2026

Synopsis

High pressure will drive breezy trades the next several days. The majority of the showers will focus along windward and upslope mauka locations. A slight increase in shower coverage is anticipated later this week, with higher rain accumulation likely occurring during the overnight hours.

Aviation

Issued at 303 PM HST Mon Jul 6 2026

Moderate to breezy trades will continue for the next several days. Low clouds and scattered showers will move over windward and mountain areas, with some spillover into leeward sites. VFR for most sites at most times, with occasional localized MVFR mainly for windward/mauka sites.

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

Marine

Issued at 815 PM HST Mon Jul 6 2026

A strong high pressure ridge centered north of the state will help to drive fresh to strong trades across all local waters through Tuesday afternoon. A Small Craft Advisory (SCA) remains in effect for all waters through Tuesday afternoon. Will continue to monitor to see if some zones may drop out of the SCA as winds shift more easterly and drop a notch Tuesday evening.

A moderate, long period, south southwest (180-190 degrees) swell will continue to generate surf along south facing shores just below advisory levels. This swell energy will slowly lower Tuesday through the remainder of the week. Expect small surf for south facing shores leading into this weekend with mainly background energy. Another moderate, long period south southwest swell (210-220 degrees) may fill in Sunday but due to the direction of the source could be more inconsistent than this current swell.

Surf along east facing shores will remain rough and choppy through the week as fresh to strong trades hold. A small, moderate period west (280 degrees) swell is expected to arrive this weekend and linger into early next weekend. No significant swells are expected out of the north or northwest.

Watches, Warnings, Advisories

Small Craft Advisory until 6 PM HST Tuesday for Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters- Big Island Windward Waters-Kaiwi Channel-Kauai Channel-Kauai Leeward Waters-Kauai Northwest Waters-Kauai Windward Waters- Maalaea Bay-Maui County Leeward Waters-Maui County Windward Waters-Oahu Leeward Waters-Oahu Windward Waters-Pailolo Channel.

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