textproduct: Honolulu

SYNOPSIS

Breezy easterly trade winds will persist through tonight, then ease into the light to moderate range from Thursday through Saturday. Clouds and showers will favor windward and mauka areas, with a period of increased shower activity through early Thursday as a band of moisture moves through the islands. A few afternoon clouds and showers may develop over interior and leeward areas Thursday through Saturday where localized sea breezes form. Trade winds are expected to strengthen again late this weekend and into early next week.

UPDATE

Latest observations from satellite and radar imagery continue to show scattered showers moving into windward and mauka areas spanning across much of the state. Precipitation amounts have generally remained a tenth of an inch or less over the last hour (as of 7:30 PM HST) with exception to windward Big Island, namely around the Hilo area, where rainfall has nearly doubled. Based on previous readings, rainfall has eased significantly compared to earlier today. Trades also remain moderate across much of the state, however, are expected to ease gradually ease throughout the next couple of days. The current forecast describes the situation well, therefore, no amendments will be made with this evening's update.

PREV DISCUSSION

Issued at 324 PM HST Wed Jun 10 2026 A pocket of moisture embedded in the trade wind flow will continue to move across the island chain through Thursday morning, bringing isolated to scattered windward and mauka showers through this afternoon and scattered to numerous showers overnight into the morning hours. As drier air fills in behind it during the day on Thursday, shower coverage will decrease, with drier conditions expected through the weekend.

Breezy trades will gradually ease over the next couple of days as the ridge to the north of the state weakens. The transition to a lighter flow will allow for continued windward to mauka showers as limited moisture moves in on the trades, and the addition of leeward and interior clouds and showers as sea breezes develop each afternoon. Any showers during this period will likely be light and brief due to the limited available moisture.

Model guidance suggests that moderate to locally breezy trades will try to become reestablished by early next week as surface ridging builds northeast of the state. With the next band of moisture expected to arrive sometime Sunday night into Monday and more moisture building into the area by midweek, there will be periodic upticks in windward and mauka showers Sunday night onward.

AVIATION

Trade winds will ease slightly over the next couple of days as a surface ridge north of the islands weakens. Low cigs and SHRA riding in on the trades should impact windward and mauka locations this evening. Some isol IFR to MVFR conds possible otherwise VFR prevails.

AIRMET Sierra is in effect for mtn obsc for windward locations of Oahu to the Big Island.

MARINE

A surface ridge north of the area will weaken Thursday through Saturday as a front passes far north of the state. Moderate to fresh trades will ease into the gentle to moderate category during this time with localized land and sea breezes possible. Fresh to locally strong easterly trades will return Sunday through early next week as the surface ridges strengthens north of the state.

A series of small pulses of south- southwest swells will fill in Thursday into Friday keeping near average surf along south facing shores.

Long-period energy from a storm that passed within our swell window around New Zealand earlier this week is expected to gradually fill in locally late Friday through the weekend. Wave models have this swell peaking Sunday into Monday that will drive surf heights near or above warning levels. This swell will coincide with the peak monthly tides and will likely lead to significant wave runup and minor coastal flooding during the first half of next week, particularly during the peak daily high tide cycles. South shore surf will remain elevated through much of next week due to the slow decline of this large south swell and a series of more overlapping southerly swells.

East shore surf will slowly decline below seasonal averages through the the weekend as trades ease, then pick up a notch next week as more breezy trades return. No significant swells expected elsewhere.

HFO WATCHES/WARNINGS/ADVISORIES

None.