Moderate trades deliver showers windward and mauka through the period.
Issued at 345 AM HST Mon Jul 20 2026 Moderate trades will continue through the forecast period. VFR conditions will prevail except isolated MVFR conditions over windward and mauka areas in clouds and showers.
No AIRMETs are in effect and none are anticipated through the forecast period.
The trade winds will hold at mostly moderate speeds today through Tuesday, then restrengthen back to fresh and locally strong speeds Wednesday through Friday as high pressure strengthens north of the island chain.
The current long-period south swell is bringing advisory level surf to some south facing shores this morning. The swell is expected to hold through at least Tuesday, which is expected to keep surf at lower-end advisory levels for which a High Surf Advisory is now in effect. This swell with then slowly fade during the middle of the week, but will be followed by a new long-period south swell arriving on Thursday, which will keep surf elevated above the summertime average through the weekend.
Surf along east-facing shores will remain slightly below seasonal levels today through Wednesday as the trades ease upstream of the islands. East shore surf should then build back close to seasonal levels late this week and through the weekend as stronger trades return over and upstream on the islands. Additionally, swell generated by former tropical cyclone Elida may give a slight boost to east shore surf during the middle of the week.
Surf along north-facing shores will remain at flat to tiny levels through the weekend.
High Surf Advisory until 6 PM HST Tuesday for all south-facing shores.
