West Kaua’i

Tonight: Mostly clear. Lows around 68 near the shore to around 58 above 3000 feet. Northeast winds around 10 mph.

Friday: Sunny. Isolated showers in the afternoon. Highs 81 to 86 near the shore to around 73 above 3000 feet. East winds around 10 mph. Chance of rain 20 percent.

Friday Night: Mostly clear. Lows around 69 near the shore to around 60 above 3000 feet. Northeast winds up to 10 mph.

South Kaua’i

Tonight: Mostly clear. Lows around 69. Northeast winds 10 to 15 mph.

Friday: Mostly sunny. Isolated showers in the afternoon. Highs 76 to 85. Northeast winds 10 to 15 mph. Chance of rain 20 percent.

Friday Night: Partly cloudy with isolated showers. Lows around 70. Northeast winds around 15 mph. Chance of rain 20 percent.

Kaua’i Mountains

Tonight: Mostly clear. Isolated showers in the evening. Lows 61 to 67 in the valleys to around 57 above 4000 feet. Northeast winds 10 to 15 mph. Chance of rain 20 percent.

Friday: Mostly sunny. Isolated showers in the morning, then scattered showers in the afternoon. Highs 74 to 79 in the valleys to around 66 above 4000 feet. Northeast winds 10 to 15 mph. Chance of rain 30 percent.

Friday Night: Partly cloudy. Scattered showers in the evening, then isolated showers after midnight. Lows 62 to 68 in the valleys to around 57 above 4000 feet. Northeast winds 10 to 15 mph. Chance of rain 40 percent.

North Kaua’i

Tonight: Partly cloudy. Isolated showers in the evening. Lows 63 to 71. Northeast winds 10 to 15 mph. Chance of rain 20 percent.

Friday: Mostly sunny with isolated showers. Highs 74 to 82. East winds 10 to 15 mph. Chance of rain 20 percent.

Friday Night: Partly cloudy. Scattered showers in the evening, then isolated showers after midnight. Lows 63 to 72. East winds 10 to 15 mph. Chance of rain 40 percent.

East Kaua’i

Tonight: Partly cloudy. Isolated showers in the evening. Lows 62 to 72. Northeast winds around 10 mph. Chance of rain 20 percent.

Friday: Mostly sunny with isolated showers. Highs 74 to 83. Northeast winds 10 to 15 mph. Chance of rain 20 percent.

Friday Night: Partly cloudy. Scattered showers in the evening, then isolated showers after midnight. Lows 63 to 73. Northeast winds 10 to 15 mph. Chance of rain 30 percent.

Detailed Forecast

Synopsis

Moderate to locally breezy trade winds are filtering back into the region due to a surface ridge building north of the islands. Rainfall will be limited into Saturday due to an upper level ridge over the islands. However low level moisture riding in on the trades will bring more typical windward and mauka showers by the end of the weekend into early next week.

Short term update

No changes to the forecast this evening, and not expecting any significant changes with the morning package.

Prev discussion

Issued at 331 PM HST Thu Apr 23 2026
A low pressure system east-northeast of the islands, combined with low about 1000 miles north-northwest of the islands are helping to disrupt the trade wind flow. However the low to the east-northeast will continue to weaken today as it moves to the east away from the islands. The low to the north- northwest will lift to the north. As this happens, the ridge to the north will strengthen, and moderate to locally breezy trades will filter back over the islands tonight into Friday. The global models agree on mid level ridging over the region which will help to maintain a stable airmass, limiting rainfall totals over the next few days.
The global models are in good agreement that moisture from the aforementioned low will get caught up in the trade wind flow over the weekend, and make its way into the islands. This will help us return to a more typical trade wind weather pattern with some heavier showers over the windward and mauka areas, along with the clouds and showers that form over the Kona slopes during the afternoon from Sunday into early next week.

Aviation

Issued at 331 PM HST Thu Apr 23 2026
Moderate northeasterly trade winds will prevail over the islands over the next several days. VFR conditions are expected, with isolated showers and brief MVFR conditions possible for primarily windward and mountain sites. No AIRMETs are in effect.

Marine

Issued at 331 PM HST Thu Apr 23 2026
A ridge of high pressure far north of the state will maintain moderate to fresh trade winds through much of next week. A weak trough moving over the state this weekend into early next week will cause the trade winds to briefly weaken and shift more easterly and will bring an increase of showers especially over windward waters. Brief periods of locally strong winds will be possible over the windier areas around Maui County and the Big Island through next week.
A pair of gale lows in the North Pacific will send a series of small northwest to north-northwest swells Friday night into the first half of next week. These swells should help maintain near average surf along north facing shores into next week. A storm- force low developing this weekend near the Aleutian Islands should send a slightly larger northwest swell towards the middle of next week.
The current short to medium period north-northeast swell will continue to decline this evening. A small fetch of strong northeast winds associated with the weak low northeast of the state, could provide some reinforcing short-period swell Friday into Saturday. Otherwise, below average surf is expected along east facing shores next week due to the lack of strong trade winds locally or upstream of the state.
Small background energy from the west will continue to linger the next few days and fade out this weekend. A small southwest bump from the Tasman Sea that passed across American Samoa's 51209 buoy yesterday is expected to arrive this weekend. No significant south swells are expected through the first half of next week.

HFO Watches/Warnings/Advisories

None.

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Data Courtesy of NOAA.gov