Hilo

Rest Of Tonight: Mostly cloudy with numerous showers. Lows 64 to 71 near the shore to around 57 at 4000 feet. East winds up to 10 mph. Chance of rain 70 percent.

Saturday: Partly sunny with scattered showers. Highs around 81 near the shore to around 68 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 50 percent.

Saturday Night: Mostly cloudy with scattered showers. Lows 61 to 70 near the shore to 52 to 57 at 4000 feet. North winds up to 15 mph. Chance of rain 50 percent.

Kona

Rest Of Tonight: Partly cloudy with isolated showers. Lows 66 to 74 near the shore to around 55 near 5000 feet. Light winds. Chance of rain 20 percent.

Saturday: Mostly sunny with isolated showers in the morning, then partly sunny with scattered showers in the afternoon. Highs 81 to 86 near the shore to around 65 near 5000 feet. Northwest winds up to 10 mph. Chance of rain 50 percent.

Saturday Night: Mostly clear. Isolated showers after midnight. Lows 70 to 75 near the shore to around 52 near 5000 feet. Light winds. Chance of rain 20 percent.

Waimea

Rest Of Tonight: Mostly cloudy with scattered showers. Lows 64 to 72 near the shore to 59 to 65 near 3000 feet. East winds up to 15 mph. Chance of rain 50 percent.

Saturday: Partly sunny in the morning then becoming mostly sunny. Breezy. Scattered showers. Highs around 80 near the shore to 70 to 78 near 3000 feet. East winds up to 20 mph. Chance of rain 50 percent.

Saturday Night: Breezy. Partly cloudy with isolated showers in the evening, then mostly cloudy with scattered showers after midnight. Lows 62 to 71 near the shore to 56 to 63 near 3000 feet. East winds 10 to 20 mph. Chance of rain 30 percent.

Kohala

Rest Of Tonight: Mostly cloudy with scattered showers. Lows 64 to 72 near the shore to 59 to 65 near 3000 feet. East winds up to 15 mph. Chance of rain 50 percent.

Saturday: Partly sunny in the morning then becoming mostly sunny. Breezy. Scattered showers. Highs around 80 near the shore to 70 to 78 near 3000 feet. East winds up to 20 mph. Chance of rain 50 percent.

Saturday Night: Breezy. Partly cloudy with isolated showers in the evening, then mostly cloudy with scattered showers after midnight. Lows 62 to 71 near the shore to 56 to 63 near 3000 feet. East winds 10 to 20 mph. Chance of rain 30 percent.

South Big Island

Rest Of Tonight: Partly cloudy. Isolated showers early in the evening. Lows around 74 near the shore to around 58 near 5000 feet. East winds up to 15 mph. Chance of rain 20 percent.

Saturday: Breezy. Mostly sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs around 84 near the shore to around 66 near 5000 feet. East winds up to 20 mph. Chance of rain 20 percent.

Saturday Night: Partly cloudy in the evening then becoming clear. Breezy. Lows around 75 near the shore to around 55 near 5000 feet. East winds up to 20 mph.

Puna

Rest Of Tonight: Mostly cloudy with numerous showers. Lows 64 to 71 near the shore to around 57 at 4000 feet. East winds up to 10 mph. Chance of rain 70 percent.

Saturday: Partly sunny with scattered showers. Highs around 81 near the shore to around 68 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 50 percent.

Saturday Night: Mostly cloudy with scattered showers. Lows 61 to 70 near the shore to 52 to 57 at 4000 feet. North winds up to 15 mph. Chance of rain 50 percent.

Waikoloa

Rest Of Tonight: Partly cloudy with isolated showers. Lows 68 to 74 near the shore to around 56 above 4000 feet. Northeast winds up to 15 mph. Chance of rain 20 percent.

Saturday: Sunny with isolated showers. Highs around 85 near the shore to 65 to 70 above 4000 feet. North winds up to 15 mph. Chance of rain 20 percent.

Saturday Night: Mostly clear. Isolated showers after midnight. Lows around 73 near the shore to 49 to 56 above 4000 feet. East winds up to 15 mph. Chance of rain 20 percent.

Detailed Forecast

Synopsis

A weak surface trough will gradually move east to west across the islands tonight through Saturday, resulting in relatively light winds and a combination of trade showers and sea-breeze showers (during the afternoons). As this trough dissipates, trades will build in stronger Saturday night through Sunday, and even stronger trades are forecast for next week from Tuesday onward.

Short term update

Minor updates were made to PoP otherwise previous forecast remains on track.

Prev discussion

Issued at 339 PM HST Fri May 8 2026
Radar show showers, mainly windward and mauka, over Kauai and Niihau this afternoon. An increase in showers across the Big Island is expected soon, and is likely also on windward (northeast) Maui and Molokai. Satellite indicates low clouds over or near the higher terrain on each island, along with wispy high clouds streaming in from the southwest. These higher clouds should continue through the night, while the lower clouds will diminish in most areas after sunset.
A weak surface trough was located between Maui County and the Big Island as of 3 PM HST this afternoon. This feature will slowly drift westward, reaching Kauai Sunday. Trade winds will build in behind this trough, moving in from east to west through this weekend. Wind speeds will initially be light to moderate, but will become moderate to occasionally breezy early next week. This trough will keep winds weak enough to allow for sea-breeze showers to occasionally develop over leeward areas, even as trade winds build in and bring their typical windward-focused showers.
While that is occurring at the surface, the flow aloft will change significantly. We will transition from weak troughing to our north this weekend to the rapid development of a closed ridge to our northwest by Monday. This ridge will become elongated along an east-west axis and remain with us all next week. Its presence will keep a surface ridge in place, allowing the trades to blow at least through the end of next week, and likely longer. This means trade wind showers, mainly windward and mauka, will be the rule for quite a while. There will be occasional fluctuations in available moisture throughout this period, and these will result in periods of enhanced shower activity from time to time. The timing is impossible to nail down more than a few days in advance.

Aviation

Light to moderate trades gradually return tonight, becoming locally breezy tomorrow morning and persisting through the next several days. Expect cloud and shower activity to develop along the typical windward and mauka areas, resulting in periods of MVFR conditions. Otherwise, VFR conditions will prevail.
AIRMET Sierra remains in effect for mountain obscuration over Kauai due to lingering showers. There will be consideration for AIRMET Tango for low-level turbulence as trades gradually return.

Marine

A high pressure ridge will remain in place north of the islands with gentle to fresh trade winds for most coastal waters with periods of strong trade winds developing over the windier waters and channels near Maui and the Big Island from Sunday onward. A Small Craft Advisory may be needed for these windier waters by Saturday night.
A declining moderate, medium-period, northwest swell will continue to bring elevated surf to north and west facing shores tonight. This swell and associated surf will slowly fade through the weekend. A new small, medium period northwest swell arrives on Saturday, leading to a small bump in north and west shore surf on Sunday. For the first half of next week, surf will be small with the lack of any significant northerly swell energy.
Background long period swell energy will keep small surf along south facing shores.
Surf along east facing shores will remain below normal this weekend, but will gradually increase through next week as trade winds gradually strengthen.

HFO Watches/Warnings/Advisories

None.

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Data Courtesy of NOAA.gov