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Weather RadarRegional forecast
Regional Kaua`i Weather Forecast March 25, 2026
West Kaua’i
Rest Of Today: Mostly sunny. Highs around 80 near the shore to around 69 above 3000 feet. Northeast winds up to 10 mph shifting to the southwest in the afternoon.
Tonight: Mostly clear. Lows around 65 near the shore to around 55 above 3000 feet. Northeast winds up to 10 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.
South Kaua’i
Rest Of Today: Breezy. Mostly cloudy with scattered showers late in the morning, then mostly sunny with isolated showers in the afternoon. Highs 75 to 81. Northeast winds 15 to 20 mph. Chance of rain 40 percent.
Tonight: Partly cloudy in the evening then becoming mostly cloudy. Breezy. Isolated showers. Lows around 65. Northeast winds 10 to 20 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.
Kaua’i Mountains
Rest Of Today: Partly sunny with scattered showers. Highs 70 to 75 in the valleys to around 60 above 4000 feet. Northeast winds up to 15 mph. Chance of rain 50 percent.
Tonight: Mostly cloudy with scattered showers. Lows 57 to 63 in the valleys to around 52 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 70 to 76 in the valleys to around 61 above 4000 feet. Northeast winds up to 15 mph. Chance of rain 50 percent.
North Kaua’i
Rest Of Today: Partly sunny late in the morning then becoming mostly sunny. Scattered showers. Highs 71 to 80. East winds 10 to 15 mph shifting to the northeast in the afternoon. Chance of rain 40 percent.
Tonight: Partly cloudy in the evening then becoming mostly cloudy. Scattered showers. Lows 58 to 67. East winds up to 15 mph. Chance of rain 50 percent.
Thursday: Partly sunny. Scattered showers in the morning. Highs 71 to 80. East winds up to 15 mph. Chance of rain 50 percent.
East Kaua’i
Rest Of Today: Partly sunny with scattered showers. Highs 69 to 79. Northeast winds 10 to 15 mph. Chance of rain 50 percent.
Tonight: Mostly cloudy. Scattered showers in the evening, then isolated showers after midnight. Lows 59 to 69. Northeast winds 10 to 15 mph. Chance of rain 50 percent.
Thursday: Partly sunny. Scattered showers in the morning. Highs 70 to 80. Northeast winds 10 to 15 mph. Chance of rain 40 percent.
Detailed Forecast
Synopsis
A drier and more stable trade wind pattern is expected through the weekend and into early next week. Showers should be mostly focused along windward and mauka locations through the period.
Short term update
Issued at 933 AM HST Wed Mar 25 2026
Minor update this morning to address some small differences with sky cover based on latest satellite. Otherwise, the models are locked in on the trades being with us for the foreseeable future. Light trade wind showers mainly windward and mauka will continue well into next week. Update out shortly.
Prev discussion
Issued at 304 AM HST Wed Mar 25 2026
Looking at radar and satellite, typical trade wind clouds are streaming in from the east-northeast. Expect scattered windward and mauka showers across all islands for the next several days especially in the late evening and overnight hours. Northeast winds will remain elevated and gusty through tonight but should begin to ease some tomorrow into tomorrow evening.
An upper low will swing by to the northeast and push a fairly dry cold front through Thursday night through Saturday night, bringing even more drier air to the state. At this time, the forecast is for dewpoints in the mid 50s Saturday night, with upper 50s both Friday and Sunday nights. Looks like a cool weekend in store.
Aviation
Issued at 304 AM HST Wed Mar 25 2026
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, mostly through the early morning hours today.
Marine
Issued at 304 AM HST Wed Mar 25 2026
A low pressure system north-northeast of the islands and a high pressure system to the north-northwest of the Hawaii region will keep northeasterly trade winds in the forecast through the week.A Small Craft Advisory (SCA) has decreased in coverage to most eastern coastal waters through early Thursday morning for winds. Winds will briefly ease on Thursday and Friday, likely falling below SCA thresholds. A new high pressure develops far northwest of Hawaii by Friday night, strengthening trade winds into the fresh to strong range this weekend with returning SCA conditions from Saturday into the first half of next week.
A short to medium period north-northeast swell will slowly decline today. The forerunners of another small northwest swell will arrive at the buoys later today, with the medium period swell peaking 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 potential 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 keep surf heights just above flat conditions 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, Maalaea Bay, Maui County Leeward Waters, Pailolo Channel.
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Data Courtesy of NOAA.gov
