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Weather RadarRegional forecast
Regional Kaua`i Weather Forecast March 26, 2026
West Kaua’i
Rest Of Tonight: Mostly clear. Lows around 65 near the shore to around 55 above 3000 feet. Northeast winds 10 to 15 mph.
Thursday: Mostly sunny with isolated showers in the morning, then partly sunny in the afternoon. Highs around 80 near the shore to around 68 above 3000 feet. Northeast winds up to 10 mph shifting to the southwest in the afternoon. Chance of rain 20 percent.
Thursday Night: Partly cloudy in the evening, then mostly cloudy with isolated showers after midnight. Lows around 65 near the shore to around 56 above 3000 feet. Northeast winds up to 10 mph. Chance of rain 20 percent.
South Kaua’i
Rest Of Tonight: Mostly cloudy with isolated showers. Lows around 65. Northeast winds 10 to 15 mph. Chance of rain 20 percent.
Thursday: Partly sunny. Isolated showers in the morning. Highs 75 to 82. Northeast winds 10 to 15 mph. Chance of rain 20 percent.
Thursday Night: Mostly cloudy with scattered showers. Lows around 65. Northeast winds 10 to 15 mph. Chance of rain 50 percent.
Kaua’i Mountains
Rest Of Tonight: Mostly cloudy with scattered showers. Lows 57 to 63 in the valleys to around 53 above 4000 feet. Northeast winds up to 15 mph. Chance of rain 50 percent.
Thursday: Mostly cloudy. Scattered showers in the morning, then isolated showers in the afternoon. Highs 68 to 74 in the valleys to around 60 above 4000 feet. Northeast winds up to 10 mph. Chance of rain 50 percent.
Thursday Night: Mostly cloudy. Scattered showers in the evening, then numerous showers after midnight. Lows 57 to 63 in the valleys to around 53 above 4000 feet. Northeast winds 10 to 15 mph. Chance of rain 70 percent.
North Kaua’i
Rest Of Tonight: Partly cloudy early in the evening then becoming mostly cloudy. Scattered showers. Lows 58 to 67. East winds 10 to 15 mph decreasing to up to 15 mph after midnight. Chance of rain 50 percent.
Thursday: Partly sunny. Scattered showers in the morning. Highs 71 to 79. East winds up to 15 mph. Chance of rain 50 percent.
Thursday Night: Mostly cloudy with scattered showers. Lows 58 to 67. Northeast winds 10 to 15 mph. Chance of rain 50 percent.
East Kaua’i
Rest Of Tonight: Mostly cloudy. Scattered showers early in the evening, then isolated showers after midnight. Lows 59 to 69. North winds 10 to 15 mph. Chance of rain 50 percent.
Thursday: Partly sunny. Scattered showers in the morning. Highs 68 to 80. Northeast winds 10 to 15 mph. Chance of rain 40 percent.
Thursday Night: Mostly cloudy with scattered showers. Lows 59 to 69. Northeast winds 10 to 15 mph. Chance of rain 50 percent.
Detailed Forecast
Synopsis
A drier and more stable trade wind pattern is expected through the weekend and into at least the middle of next week. Showers should be mostly focused along windward and mauka locations through the period. Nights will be cool in sheltered areas this weekend.
Short term update
No changes were made. Previous forecast remains on track.
Prev discussion
Light trade wind showers were detected by radar this afternoon along most windward coasts, but measurable rainfall has been limited. Satellite showed plenty of clouds along windward and mauka areas, and along the Kona coast. Winds were brisk, averaging 10-20 mph with gusts 20-35 mph.
We are forecast to remain in a trade wind pattern for the foreseeable future…at least for the next 7 days and likely longer. Wind speeds will weaken slightly tomorrow and Friday, then strengthen Saturday into Sunday as a weak cold front moves through. This front will bring another shot of dry air to the region. Dewpoints Friday through Monday should get into the mid 50s at times, allowing for cool nights for most areas. Another plus from the dry air will be enhanced evaporation, helping to eliminate standing water from all the recent flooding and perhaps aid cleanup.
Aviation
Mostly dry and breezy northeast trade wind conditions will prevail across the island chain over the next 24 h. As a result, AIRMET Tango continues for low-level turbulence across leeward areas of all islands. Brief periods with MVFR CIGS/VSBYS are possible in passing showers, mainly for windward sites.
Marine
A low pressure system east-northeast of the islands and a high pressure system to the far north-northwest of the Hawaii region will keep northeasterly trade winds in the forecast through the week. A scatterometer pass this afternoon showed more extensive small craft winds through the Kaiwi and Kauai Channels, which has prompted an expansion of the Small Craft Advisory (SCA) which remains in effect through early Thursday morning. Winds will briefly ease on Thursday and Friday, likely falling below SCA thresholds. High pressure drops south from the Bering Sea through this weekend, leading to a strengthening pressure gradient and stronger trade winds through and north of the Hawaiian Islands. Fresh to strong trade winds bring a return of SCA conditions from Saturday into the first half of next week.
The forerunners of a small northwest swell have reached the northwest buoys and will arrive along the north shores tonight. The medium period swell is expected to peak around 3 feet on Thursday before gradually declining through the weekend. For east facing shores, short period wind wave energy from northeasterly trade winds will hold into the weekend. Strengthening northeasterly winds this weekend and a swath of gales associated with a low around one thousand miles northeast of the islands will lead to the potential for high surf advisories along north and east facing shores from Sunday into early next week.
For south facing shores, small background energy pulses will bring surf heights back above flat conditions Thursday evening into early next week.
HFO Watches/Warnings/Advisories
Small Craft Advisory until 6 AM HST Thursday for Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters, Big Island Windward Waters, Kaiwi Channel, Kauai Channel, Maalaea Bay, Maui County Leeward Waters, Oahu Leeward Waters, Pailolo Channel.
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Data Courtesy of NOAA.gov
