Hilo

Rest Of Today: Partly sunny with scattered showers. Highs around 80 near the shore to 63 to 68 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 50 percent.

Tonight: Mostly cloudy with scattered showers. Lows 60 to 69 near the shore to 50 to 56 at 4000 feet. North winds up to 10 mph shifting to the west after midnight. Chance of rain 50 percent.

Sunday: Partly sunny with scattered showers. Highs around 81 near the shore to around 67 at 4000 feet. Northeast winds up to 10 mph. Chance of rain 40 percent.

Kona

Rest Of Today: Mostly sunny late in the morning then becoming partly sunny. Isolated showers. Highs 80 to 85 near the shore to around 66 near 5000 feet. West winds up to 10 mph. Chance of rain 20 percent.

Tonight: Mostly clear. Isolated showers in the evening. Lows around 71 near the shore to 48 to 53 near 5000 feet. Light winds. Chance of rain 20 percent.

Sunday: Sunny in the morning, then partly sunny with scattered showers in the afternoon. Highs 81 to 86 near the shore to around 66 near 5000 feet. West winds up to 10 mph. Chance of rain 40 percent.

Waimea

Rest Of Today: Mostly sunny. Scattered showers late in the morning, then isolated showers in the afternoon. Highs around 78 near the shore to 68 to 76 near 3000 feet. East winds up to 15 mph. Chance of rain 50 percent.

Tonight: Partly cloudy with isolated showers. Lows 61 to 70 near the shore to 53 to 60 near 3000 feet. East winds up to 10 mph. Chance of rain 20 percent.

Sunday: Mostly sunny. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 79 near the shore to 69 to 76 near 3000 feet. East winds up to 15 mph. Chance of rain 40 percent.

Kohala

Rest Of Today: Mostly sunny. Scattered showers late in the morning, then isolated showers in the afternoon. Highs around 78 near the shore to 68 to 76 near 3000 feet. East winds up to 15 mph. Chance of rain 50 percent.

Tonight: Partly cloudy with isolated showers. Lows 61 to 70 near the shore to 53 to 60 near 3000 feet. East winds up to 10 mph. Chance of rain 20 percent.

Sunday: Mostly sunny. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 79 near the shore to 69 to 76 near 3000 feet. East winds up to 15 mph. Chance of rain 40 percent.

South Big Island

Rest Of Today: Mostly sunny. Isolated showers in the afternoon. Highs around 84 near the shore to around 64 near 5000 feet. Southeast winds up to 15 mph shifting to the east in the afternoon. Chance of rain 20 percent.

Tonight: Partly cloudy with isolated showers in the evening, then clear after midnight. Lows around 73 near the shore to around 54 near 5000 feet. Northeast winds up to 15 mph. Chance of rain 20 percent.

Sunday: Sunny. Scattered showers in the afternoon. Highs around 84 near the shore to around 66 near 5000 feet. East winds up to 15 mph. Chance of rain 40 percent.

Puna

Rest Of Today: Partly sunny with scattered showers. Highs around 80 near the shore to 63 to 68 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 50 percent.

Tonight: Mostly cloudy with scattered showers. Lows 60 to 69 near the shore to 50 to 56 at 4000 feet. North winds up to 10 mph shifting to the west after midnight. Chance of rain 50 percent.

Sunday: Partly sunny with scattered showers. Highs around 81 near the shore to around 67 at 4000 feet. Northeast winds up to 10 mph. Chance of rain 40 percent.

Waikoloa

Rest Of Today: Sunny. Isolated showers in the afternoon. Highs around 84 near the shore to around 68 above 4000 feet. North winds up to 15 mph. Chance of rain 20 percent.

Tonight: Mostly clear. Lows around 71 near the shore to around 52 above 4000 feet. East winds up to 10 mph in the evening becoming light.

Sunday: Sunny. Isolated showers in the afternoon. Highs around 84 near the shore to 66 to 71 above 4000 feet. North winds up to 10 mph. Chance of rain 20 percent.

Detailed Forecast

Synopsis

A high pressure system far north of the Hawaiian Islands will slowly drift east over the next few days, the ridge will remain in place north of the region keeping easterly trade winds in the forecast through the end of next week. An upper level disturbance moves over the islands on Tuesday and then drifts slowly eastward, increasing clouds and showers across the region lasting into the end of next week. Shower activity during this time period will favor windward mountain areas mainly in the overnight to early morning hours.

Short term update

The satellite picture this evening shows a weak low level trough passing through the Hawaii region. Expect overnight diurnal shower activity to increase with temperature inversion heights rising to around 8,000 feet as this 700 mb trough passes through the island chain. By Sunday a weak upper level trough moves in from the north, keeping temperature inversion heights elevated and passing showers in the forecast favoring windward mountain areas in the overnight through early morning hours lingering into Monday morning.
The forecast grids look reasonable with no evening updates.

Previous discussion

Issued at 343 PM HST Sat Apr 25 2026 Isolated light showers were seen on radar this afternoon over the windward areas of most islands, with the highest concentration of showers over the Kau District on Big Island. Clouds were also concentrated over windward and mauka areas, and over the Kona region of Big Island. Showers and clouds will decrease in most areas around and especially after sunset.
Upper level ridging to our northwest will continue for the next few days, and this will help keep trades winds going. Models are consistent showing a little more instability over Big Island tomorrow afternoon, and the chance of showers was increased over mainly the southern half of the island. By Tuesday night, there is increasing confidence that a fast moving upper level low will move over the islands from the northwest, bringing with it cold air aloft. Moisture will be limited, but there still should be an uptick in shower coverage and strength Tuesday night and Wednesday. The NBM guidance was unusually dry through this period, and was not used.
This low moves off quickly late Wednesday into Wednesday night, and a new upper level ridge to our northwest will take over. Therefore, trades will continue and strengthen from Wednesday through next weekend. Winds strong enough to warrant a small craft advisory are likely to develop, but it's too far out in time for details. Apart from Tuesday night and Wednesday, expect typical trade showers mainly windward and mauka.

Aviation

Issued at 343 PM HST Sat Apr 25 2026
Moderate to locally breezy trades through early next week. Low cigs and SHRA can be expected over windward and mauka locations. MVFR conds expected in heavier SHRA, otherwise VFR prevails.
No AIRMETs in effect.

Marine

Issued at 343 PM HST Sat Apr 25 2026 High pressure north of the state is producing moderate to fresh trade winds this afternoon. A slight decrease is expected tonight into early next week as a weak trough tracks west across the state. The trough should bring an increase of shower coverage, especially over windward waters. High pressure will rebuild far north of the state towards the middle of next week, which should bring the return of moderate to locally strong trades.
A medium-period northwest swell peaks tonight into Sunday, producing small to moderate surf for north and west-facing shores, before gradually declining through early next week. A hurricane-force low tracking across the Aleutian Islands tonight should send a moderate northwest swell towards Hawaii around the middle of next week.
Short-period northeasterly energy is beginning to decrease this afternoon, which will keep below average surf along eastern exposures for the first half of next week due to the lack of any strong trade wind activity. Locally strong trade winds could return during the latter half of next week, which could bring rough and choppy surf with near normal wave heights.
Small background energy from the west will continue to linger through today and fade out on Sunday. A small southwest bump from the Tasman Sea is expected to slowly fill in tonight and peak on Sunday. No significant south swell is expected through the first half of next week. A fetch of gales passing east of New Zealand today could produce a small south-southwest swell for next weekend.

HFO Watches/Warnings/Advisories

None.

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Data Courtesy of NOAA.gov