Slightly weaker trade wind flow today with a few light windward showers. Wednesday into Thursday, light easterly flow will lead to the development of sea/land breezes. Thus, most cloud cover and shower activity will be limited to interior and mountain areas during the afternoons. In addition, deeper moisture moving in from the southeast Wednesday through Friday should bring increased shower chances to the Big Island and Maui.
Issued at 310 AM HST Tue Jun 16 2026
Moderate trades today before weakening Wednesday. Low cigs and SHRA will impact windward an mauka locations. MVFR conds possible otherwise VFR prevails. Weakening trades should allow for sea/land breeze development on Wednesday.
No AIRMETs in effect.
Issued at 310 AM HST Tue Jun 16 2026
Moderate to locally fresh trade winds will gradually ease to light to moderate speeds through the end of the week as a trough to the northwest weakens the ridge to the north. The ridge will strengthen over weakened as the troughs weaken and lifts far north, allowing fresh to moderate easterly trades to return.
The current large, long period south southwest swell will continue to slowly decline as the swell slowly fades. Swell heights remain elevated as the swell period has begun to decline. The High Surf Warning has been downgraded to a High Surf Advisory (HSA) through tonight for all south facing shores. Another south southwest swell is expected to fill in Wednesday night into Thursday that could push surf back up to HSA levels.
Surf along north facing shores will remain flat to tiny through the forecast period. Surf along east facing shores will remain below average as easterly trade winds ease through the end of the week.
A Coastal Flood Statement remains in effect for minor coastal flooding of vulnerable low-lying coastal roadways, docks, boat ramps and other coastal infrastructure due to King Tides. King Tides combined with water levels that are running higher than predicted will lead to minor flooding potential around the daily peak tide, which will be during the late afternoon and early evening hours, through today and possibly Wednesday. While minor coastal flooding is expected along all shorelines, the combination of the large south southwest swell and peak daily high tides will make low-lying coastal areas along south and west shores susceptible to more widespread coastal flooding through this evening.
A Marine Weather Statement also remains in effect due to the large, long-period south southwest swell producing harbor surges and breaking waves near harbor entrances along south and west-facing harbors.
High Surf Advisory until 6 AM HST Wednesday for Big Island South- Big Island Southeast-East Honolulu-Ewa Plain-Honolulu Metro- Kahoolawe-Kauai South-Kauai Southwest-Kipahulu-Kohala-Kona-Lanai Leeward-Lanai South-Maui Central Valley South-Maui Leeward West- Molokai Leeward South-Molokai Southeast-Niihau-South Haleakala- South Maui/Upcountry-Waianae Coast.
