West Kaua’i

Tonight: Breezy. Cloudy with occasional showers. Lows around 75 near the shore to around 66 above 3000 feet. Southeast winds 10 to 20 mph. Chance of rain 80 percent.

Thursday: Breezy. Mostly cloudy with numerous showers. Highs around 87 near the shore to around 77 above 3000 feet. Southeast winds 10 to 20 mph. Chance of rain 70 percent.

Thursday Night: Mostly cloudy with numerous showers. Lows around 75 near the shore to around 66 above 3000 feet. Southeast winds 10 to 15 mph. Chance of rain 70 percent.

South Kaua’i

Tonight: Cloudy with occasional showers. Lows 72 to 77. Southeast winds 10 to 15 mph. Chance of rain 90 percent.

Thursday: Mostly cloudy. Occasional showers in the morning, then numerous showers in the afternoon. Highs 79 to 87. Southeast winds 10 to 15 mph. Chance of rain 80 percent.

Thursday Night: Mostly cloudy with numerous showers. Lows 72 to 77. Southeast winds around 10 mph. Chance of rain 70 percent.

Kaua’i Mountains

Tonight: Cloudy with occasional showers. Lows around 71 in the valleys to around 63 above 4000 feet. South winds 10 to 15 mph. Chance of rain 80 percent.

Thursday: Mostly cloudy. Occasional showers in the morning, then numerous showers in the afternoon. Highs 75 to 83 in the valleys to around 68 above 4000 feet. Southeast winds up to 15 mph. Chance of rain 80 percent.

Thursday Night: Mostly cloudy with numerous showers. Lows around 71 in the valleys to around 63 above 4000 feet. Southeast winds 10 to 15 mph. Chance of rain 70 percent.

North Kaua’i

Tonight: Cloudy with occasional showers. Lows 67 to 76. Southeast winds 10 to 15 mph. Chance of rain 80 percent.

Thursday: Mostly cloudy with numerous showers. Highs 73 to 88. Southeast winds up to 15 mph. Chance of rain 70 percent.

Thursday Night: Mostly cloudy with numerous showers. Lows 67 to 76. Southeast winds around 10 mph. Chance of rain 70 percent.

East Kaua’i

Tonight: Cloudy with occasional showers. Lows 68 to 77. Southeast winds up to 10 mph shifting to the south after midnight. Chance of rain 90 percent.

Thursday: Mostly cloudy. Occasional showers in the morning, then numerous showers in the afternoon. Highs 76 to 85. Southeast winds 10 to 15 mph. Chance of rain 80 percent.

Thursday Night: Mostly cloudy with numerous showers. Lows 68 to 77. Southeast winds around 10 mph. Chance of rain 70 percent.

Detailed Forecast

Synopsis

Tropical Storm Nolo will gradually accelerate westward away from the state over the next several days. Elevated moisture content being drawn up in the southeast flow will maintain a wetter pattern for Hawaii through the end of the week. Then drier trades are expected to return over the weekend.

Short term update

As Tropical Storm Nolo pushes very gradually westward away from the state, moisture being drawn up in the convergent southeasterly flow will continue to supply showers to mainly the western half of the state overnight into Thursday. Some of these showers will be moderate to heavy, with 1 to 2 inch per hour rates currently observed on radar. With the rainfall already received since Tuesday night for Kauai and Oahu, will be watching for any persistent heavy showers over localized areas that might lead to nuisance flooding overnight.

Prev discussion

Issued at 420 PM HST Wed Sep 30 2026
Cloudiness with showers, heavy at times, were observed across Kauai and Oahu late this morning and early this afternoon. Showers moved from south to north through both islands, producing periods of moderate to heavy rainfall. By mid afternoon, most of the activity moved out of the islands. Rest of the state remained relatively dry, with few isolated showers moving from time to time.
This activity was associated with a moist south flow, induced by Tropical Storm Nolo's circulation. Tropical Storm Nolo continues to move slowly near Papahanaumokuakea Marine National Monument waters and will continue to do so for the next couple of days. The National Hurricane Center forecast brings tropical Storm Nolo back to hurricane status in 72 hours, but no impacts are expected across the state as Nolo continues moving away from the area.
Although Nolo will continue moving slowly away from our coastal waters, deep tropical moisture will move across the region through at least Saturday afternoon. PWAT values will remain above 1.7 inches throughout the period, decreasing to 1.25 by Sunday as a drier air mass takes control of the weather locally. Therefore, chances for precipitation will continue, especially on Friday as models are suggesting new bands of showers will move throughout the region.
In the long term, a high pressure system is expected to build northwest of the region, bringing dry weather conditions under a northeast wind flow.

Aviation

Moderate to breezy southeast winds will gradually ease tonight into Thursday as Tropical Storm Nolo tracks west, away from the state. Outer rain bands associated with Nolo will bring showers mainly over Kauai and Oahu from the south through Thursday, with Kauai expecting the most coverage. MVFR and even IFR conditions will be possible within these showers.
AIRMET Sierra for mountain obscuration above 2000 feet is in effect for all portions of the smaller islands due to clouds and showers moving in from the south and southeast. This AIRMET will likely continue through tonight, and likely through the day Thursday for Kauai and Oahu.

Marine

Issued at 420 PM HST Wed Sep 30 2026
Moderate to fresh south to southeast winds will weaken slightly to moderate levels by Thursday as Tropical Storm Nolo slowly drifts westward away from the main Hawaiian Islands. Since winds and seas have decreased below advisory levels this afternoon, the Small Craft Advisory that was previously in effect for waters surrounding Kauai has been cancelled. East to northeast trades will fill back in across the waters this weekend.
The moderate, short to medium period west to southwest swell originating from Nolo will continue for Niihau and Kauai through Friday night. Additionally, a small background south swell continues for other islands. The next small, long period south swell energy will arrive either late Sunday or Monday.
Surf along other shores will remain small until moderate trades return late this weekend, providing a slight boost to east facing shores. Multiple rounds of tiny northwest swell energy will reach north and west facing shores this weekend into early next week as the storms tracking near the Aleutian Islands become increasingly active.

Fire weather

Issued at 420 PM HST Wed Sep 30 2026
Fire weather conditions will improve through the remainder of the week in response to higher southern moisture and moderate southeasterlies. Drier weather conditions and lower relative humidities are then expected by the weekend.

HFO Watches/Warnings/Advisories

None.

Data Courtesy of NOAA.gov