West Side

Today: Sunny. Highs 78 to 86. East winds up to 15 mph.

Tonight: Partly cloudy with isolated showers. Lows 70 to 77. Northeast winds 10 to 15 mph. Chance of rain 20 percent.

Wednesday: Mostly cloudy with isolated showers. Highs 78 to 86. Northeast winds up to 10 mph. Chance of rain 20 percent.

South Side

Today: Sunny and breezy. Highs around 86. North winds up to 15 mph increasing to 10 to 20 mph in the afternoon.

Tonight: Partly cloudy. Breezy. Isolated showers in the evening. Lows 70 to 78. North winds up to 20 mph. Chance of rain 20 percent.

Wednesday: Mostly cloudy. Isolated showers in the afternoon. Highs around 86. North winds up to 15 mph increasing to 10 to 15 mph in the afternoon. Chance of rain 20 percent.

North Shore

Today: Mostly sunny with isolated showers. Highs around 80 near the shore to around 69 near 5000 feet. East winds up to 15 mph. Chance of rain 20 percent.

Tonight: Mostly cloudy with scattered showers. Lows around 73 near the shore to around 57 near 5000 feet. East winds up to 15 mph. Chance of rain 40 percent.

Wednesday: Cloudy with scattered showers. Highs around 81 near the shore to around 70 near 5000 feet. East winds up to 15 mph. Chance of rain 50 percent.

Central Maui

Today: Sunny. Isolated showers in the afternoon. Highs 80 to 86. Northeast winds up to 15 mph increasing to 10 to 15 mph in the afternoon. Chance of rain 20 percent.

Tonight: Partly cloudy with isolated showers. Lows 70 to 75. Northeast winds up to 15 mph. Chance of rain 20 percent.

Wednesday: Partly sunny in the morning then becoming cloudy. Isolated showers. Highs 80 to 87. Northeast winds up to 15 mph. Chance of rain 20 percent.

Upcountry

Today: Sunny. Isolated showers in the afternoon. Highs around 70 at the visitor center to around 74 at the summit. Light winds. Chance of rain 20 percent.

Tonight: Partly cloudy with isolated showers. Lows around 54 at the visitor center to around 52 at the summit. Light winds. Chance of rain 20 percent.

Wednesday: Partly sunny with isolated showers in the morning, then cloudy with scattered showers in the afternoon. Highs around 71 at the visitor center to around 74 at the summit. Northeast winds up to 10 mph. Chance of rain 40 percent.

East Maui

Today: Mostly sunny with isolated showers. Highs around 80 near the shore to around 69 near 5000 feet. East winds up to 15 mph. Chance of rain 20 percent.

Tonight: Mostly cloudy with scattered showers. Lows around 73 near the shore to around 57 near 5000 feet. East winds up to 15 mph. Chance of rain 40 percent.

Wednesday: Cloudy with scattered showers. Highs around 81 near the shore to around 70 near 5000 feet. East winds up to 15 mph. Chance of rain 50 percent.

Lanai City

Today: Sunny and breezy. Highs 76 to 83. Northeast winds up to 20 mph.

Tonight: Partly cloudy. Breezy. Isolated showers in the evening. Lows 67 to 72. Northeast winds up to 20 mph. Chance of rain 20 percent.

Wednesday: Mostly cloudy. Isolated showers in the afternoon. Highs 77 to 83. Northeast winds up to 10 mph. Chance of rain 20 percent.

Kaunakakai

Today: Sunny. Highs 76 to 89. East winds 10 to 15 mph.

Tonight: Partly cloudy with isolated showers. Lows 62 to 77. Northeast winds 10 to 15 mph. Chance of rain 20 percent.

Wednesday: Partly sunny with isolated showers. Highs 76 to 89. East winds up to 10 mph. Chance of rain 20 percent.

Detailed Forecast

Synopsis

A more seasonal trade wind pattern has returned to the state with the exit of Hurricane Lala. Expect typical trade wind showers focused along windward and mauka areas through tonight. Trade winds weaken Wednesday into the latter half of the week as a trough passes northeast of the islands. The trough also brings an increase in moisture that will produce an uptick in shower activity through Friday. This weekend, trade winds restrengthen.

Discussion

Radar and satellite show isolated showers over the waters upstream of the islands which could produce some light to moderate precipitation for windward and mauka areas this morning. A more seasonal trade wind pattern is expected through tonight, but the trades weaken for Wednesday through the latter half of the week as a trough passes northeast of the islands. The trough brings an increase in moisture that will produce an uptick in shower activity through Friday. With the lighter trades, precipitation chances could spread over leeward areas with the possible development of a sea/land breeze pattern. By this weekend, trades are expected to return, but their strength and direction are more uncertain. These factors will depend on the strength of the subtropical ridge and the evolution of a tropical disturbance in the East Pacific expected to track near the islands by early next week. Most guidance keeps this feature south of the state at this time.

Aviation

Moderate trades through the forecast period. Low cigs and SHRA along windward and mauka locations. MVFR conds possible in SHRA otherwise VFR prevails.
AIRMET Sierra is in effect for mtn obsc along windward portions of all islands. Conds should improve in the mid morning hours.

Marine

High pressure far northeast of the waters will remain nearly stationary and slowly weaken through Thursday. Wind speeds have eased slightly overnight as the Small Craft Advisory has been cancelled. Trade winds will continue to weaken further to become light and variable for most waters giving way for localized land and sea breezes. By Friday, the high will drift southeast as moderate to locally fresh trade winds will likely build back in.
Surf along south facing shores will slowly decline through midweek as offshore buoys south of the islands continue to decline. Another long period south swell generated from gales just south and east of New Zealand will begin arriving late this week. Surf along east facing shores will continue to fade as trades decrease today. North facing shores will remain tiny throughout the week.

Fire weather

Issued at 342 AM HST Tue Aug 18 2026
Moderate relatively moist trade winds will prevail through tonight. Winds will weaken Wednesday through Friday with increasing humidity. Trade winds increase over the weekend with possibly some slight drying. The inversion will be around 6000 to 7000 ft today.

HFO Watches/Warnings/Advisories

None.

Data Courtesy of NOAA.gov