Hilo

Tonight: Mostly cloudy with scattered showers. Lows 56 to 66 near the shore to 48 to 54 at 4000 feet. North winds up to 10 mph shifting to the northwest after midnight. Chance of rain 50 percent.

Saturday: Breezy. Mostly cloudy with showers likely. Highs 73 to 79 near the shore to 58 to 65 at 4000 feet. North winds 10 to 20 mph decreasing to up to 20 mph in the afternoon. Chance of rain 70 percent.

Saturday Night: Mostly cloudy. Showers likely in the evening, then scattered showers after midnight. Lows 55 to 66 near the shore to 48 to 54 at 4000 feet. North winds up to 15 mph. Chance of rain 70 percent.

Kona

Tonight: Partly cloudy with isolated showers. Lows around 69 near the shore to 46 to 51 near 5000 feet. Light winds becoming northeast around 10 mph after midnight. Chance of rain 20 percent.

Saturday: Mostly sunny. Isolated showers in the morning. Highs 78 to 84 near the shore to around 64 near 5000 feet. Northwest winds around 10 mph shifting to the southwest up to 10 mph in the afternoon. Chance of rain 20 percent.

Saturday Night: Partly cloudy. Lows 66 to 71 near the shore to 45 to 50 near 5000 feet. Light winds.

Waimea

Tonight: Partly cloudy in the evening then becoming mostly cloudy. Scattered showers. Lows 58 to 66 near the shore to 50 to 58 near 3000 feet. East winds around 10 mph. Chance of rain 50 percent.

Saturday: Breezy. Mostly cloudy with showers likely. Highs around 73 near the shore to 62 to 71 near 3000 feet. Northeast winds 10 to 20 mph decreasing to up to 20 mph in the afternoon. Chance of rain 70 percent.

Saturday Night: Mostly cloudy. Breezy. Showers likely in the evening, then scattered showers after midnight. Lows 57 to 66 near the shore to 50 to 58 near 3000 feet. Northeast winds up to 25 mph. Chance of rain 70 percent.

Kohala

Tonight: Partly cloudy in the evening then becoming mostly cloudy. Scattered showers. Lows 58 to 66 near the shore to 50 to 58 near 3000 feet. East winds around 10 mph. Chance of rain 50 percent.

Saturday: Breezy. Mostly cloudy with showers likely. Highs around 73 near the shore to 62 to 71 near 3000 feet. Northeast winds 10 to 20 mph decreasing to up to 20 mph in the afternoon. Chance of rain 70 percent.

Saturday Night: Mostly cloudy. Breezy. Showers likely in the evening, then scattered showers after midnight. Lows 57 to 66 near the shore to 50 to 58 near 3000 feet. Northeast winds up to 25 mph. Chance of rain 70 percent.

South Big Island

Tonight: Partly cloudy. Isolated showers in the evening. Lows around 71 near the shore to around 52 near 5000 feet. East winds up to 15 mph shifting to the northeast after midnight. Chance of rain 20 percent.

Saturday: Mostly sunny. Isolated showers in the morning. Highs around 81 near the shore to around 63 near 5000 feet. Southwest winds around 10 mph. Chance of rain 20 percent.

Saturday Night: Partly cloudy. Lows around 71 near the shore to around 52 near 5000 feet. East winds up to 10 mph in the evening becoming light.

Puna

Tonight: Mostly cloudy with scattered showers. Lows 56 to 66 near the shore to 48 to 54 at 4000 feet. North winds up to 10 mph shifting to the northwest after midnight. Chance of rain 50 percent.

Saturday: Breezy. Mostly cloudy with showers likely. Highs 73 to 79 near the shore to 58 to 65 at 4000 feet. North winds 10 to 20 mph decreasing to up to 20 mph in the afternoon. Chance of rain 70 percent.

Saturday Night: Mostly cloudy. Showers likely in the evening, then scattered showers after midnight. Lows 55 to 66 near the shore to 48 to 54 at 4000 feet. North winds up to 15 mph. Chance of rain 70 percent.

Waikoloa

Tonight: Partly cloudy. Isolated showers after midnight. Lows around 69 near the shore to 47 to 52 above 4000 feet. East winds up to 15 mph increasing to 10 to 15 mph after midnight. Chance of rain 20 percent.

Saturday: Breezy. Mostly sunny with isolated showers. Highs 76 to 84 near the shore to 61 to 67 above 4000 feet. Northeast winds 10 to 20 mph decreasing to up to 20 mph in the afternoon. Gusts up to 40 mph. Chance of rain 20 percent.

Saturday Night: Partly cloudy. Breezy. Isolated showers in the evening. Lows 66 to 71 near the shore to 47 to 52 above 4000 feet. East winds up to 25 mph. Chance of rain 20 percent.

Detailed Forecast

Synopsis

Moderate to locally breezy north-northeast to northeast trade winds will focus clouds and showers over windward and mauka areas with brief downpours possible over parts of Maui County tonight. A drier airmass will filter over the western half of the state by Saturday afternoon, while showery conditions could persist over the windward areas of the eastern half of the state. Drier, cooler air will fill in state wide by Sunday. Trade winds will strengthen over the next 24 hours, becoming locally strong by Saturday evening. Mostly dry with strong gusty winds are expected over leeward areas this weekend.

Short term update

Issued at 845 PM HST Fri Mar 27 2026
No major forecast changes in the short term. Satellite imagery this evening shows a pocket of moisture starting to move into Maui County tonight, which should produce showery weather over windward areas with accumulations of around 1 to 3 inches possible over windward slopes tonight. Behind this pocket of moisture, we are looking at a weak trough to push through parts of the state late tonight into Saturday. A brief increase of scattered showers are expected along the trough with a drier airmass filling in behind by Saturday afternoon for the western half of the state. As the high builds far north of the state, strong north-northeast trade winds are expected by Saturday afternoon/evening and will likely persist through Sunday. Winds may reach advisory thresholds Saturday afternoon through Sunday for leeward areas.

Discussion

Issued at 351 PM HST Fri Mar 27 2026
Satellite imagery this afternoon shows a lingering band of moisture in the form of a cluster of clouds with embedded showers just upstream of Maui County. Scattered clouds with light to a few brief moderate showers can been seen on radar focusing mainly along the windward and mauka areas as well as the Kona coast of the Big Island where a seabreeze has developed. The next band of showers associated with a remnant frontal boundary is just 150 sm north of Kauai County. Forecast remains on track with chances of showers increasing tonight mainly along windward and mauka areas as the band of showers moves south over Kauai tonight and converges with the lingering band of moisture over Maui County before pushing over the Big Island through the day Saturday. Upper level troughing over the central islands will help enhance showers under the trade wind inversion. Heavier showers are likely along windward and mauka areas of Maui County and the Big Island given the location of greatest upper level support and moisture availability. Kauai and Oahu will see moderate showers with the passage of the front however brief heavy showers cannot be entirely ruled out either. Not anticipating any significant flooding threats.
A strong pressure gradient will build north of state as a surface high develops to the northwest and a surface low strengthens to the northeast. This gradient will send very breezy northeasterly winds following behind the remnant frontal boundary and will help keep persistent clouds and showers along windward areas. Inversion heights may drop to around 5,000 ft Saturday around Kauai and Oahu as upper level ridging generates more subsidence that could lead to enhance downsloping winds on leeward sides of north facing ridges. Wind gusts of 40 mph will be possible with gusts up to 50 mph not out of the question. Depending on how strong the wind gusts become during the day Saturday, a Wind Advisory may be needed over select leeward areas for Saturday evening into Sunday. Thus will continue to monitor latest observations and guidance.
Temperatures will drop a couple of degrees by Saturday morning and dewpoints will drop in the 50's west of the the Big Island. This cooler and drier airmass will spread state wide Sunday limiting tradewind showers.
Gusty northeasterly winds will gradually ease Monday before shifting more easterly as a surface high tracks north of the state and the low pressure system moves far northeast of the state. A more typical easterly trade wind pattern of scattered showers across the windward and mauka slopes is expected through much of next week.

Aviation

Issued at 845 PM HST Fri Mar 27 2026
A band of showers and attendant MVFR conditions are expected to reach Windward Maui overnight tonight before spreading to the Big Island during the day Saturday. Moderate NNE trades hold through much of the night and then strengthen early tomorrow in response to deepening low pressure northeast of the state.
AIRMET Sierra for mountain obscuration is in effect for windward Molokai and Maui. This is expected to continue until at least early morning Saturday, with conditions potentially spreading to the Big Island by the afternoon.

Marine

Issued at 351 PM HST Fri Mar 27 2026
A low pressure system northeast of the islands will interact with high pressure building in from the northwest to strengthen the northeasterly trade winds to fresh to strong speeds through early next week. The current Small Craft Advisory covering the leeward waters and channels around the smaller islands will expand to encompass the waters around the Big Island on Saturday as the stronger winds progress down the island chain.
Another small medium-period northwest swell began filling in earlier today, and combined with the fading small short-period northeast wind swell, will help to maintain small surf across north-facing shores into Saturday. The aforementioned small northeast short-period swell will also bring slightly below average surf to east-facing shores into Saturday. As the trades strengthen on Saturday surf heights will build slightly along east-facing shores.
A deepening low to the northeast will send a large medium-period swell (360 degrees veering to 040 degrees) to north- and east- facing shores Sunday through early next week, with High Surf Advisory conditions looking likely.
Along south-facing shores, small background pulses will keep surf heights above flat conditions through early next week, with a slight bump possible on Saturday.

HFO Watches/Warnings/Advisories

Small Craft Advisory until 6 AM HST Sunday for Alenuihaha Channel, Kaiwi Channel, Kauai Channel, Kauai Leeward Waters, Kauai Northwest Waters, Maalaea Bay, Maui County Leeward Waters, Oahu Leeward Waters, Pailolo Channel.
Small Craft Advisory from 6 AM Saturday to 6 AM HST Sunday for Big Island Leeward Waters, Big Island Southeast Waters, Big Island Windward Waters.

Data Courtesy of NOAA.gov