Swell Matrix

Area Forecast Discussion

National Weather Service Honolulu Hi

923 am hst Thu aug 27 2026

Synopsis

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

Aviation

Moderate trades expected through the period. Low cigs and SHRA over windward and mauka slopes, focused across eastern Islands today, likely expanding to all Islands into Friday. 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 through the beginning of next week 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 will continue through tonight and likely need to be extended for the next several days.

Surf along south facing shores will increase throughout the day today and hold tomorrow as a small, long period south southwest swell will fills in. The largest sets could reach high surf advisory thresholds, however the majority of the surf should stay just below it, so an advisory is not expected. The swell will gradually fade through the weekend. Then another similar sized south swell is expected by the middle to the later half of next week.

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.

Visit this site often? Consider supporting us with a $10 contribution.
Learn more