Kauai weather today: showers as Tropical Storm Moke passes
Kauai weather today is breezy with scattered showers as Tropical Storm Moke passes several hundred miles south of Hawaii. Shoreline highs range from the low 70s to the low 90s, with a 50 percent chance of rain in most districts and 70 percent in the mountains. Trades ease slightly Monday, then turn drier Tuesday.
The August 24, 2026 outlook from Kauai Now, based on National Weather Service Honolulu data, is a near-miss. Moke's moisture is aimed at the Big Island, while Kauai gets lighter windward showers and easing trades.
Key Takeaways
- Most Kauai districts have a 50 percent chance of rain Monday; mountain areas rise to 70 percent.
- West-shore highs reach 88 to 93; mountain valleys stay cooler at 75 to 83.
- Tropical Storm Moke is passing several hundred miles south of Hawaii, with flooding risk focused on the Big Island.
- A Small Craft Advisory covers Hawaiian waters until 6 AM HST Monday; drier trades return Tuesday.
- East-facing surf should ease a notch, with a three-to-four-foot south swell Monday and Tuesday.
What is the weather today in each Kauai region?
West Kauai starts mostly sunny with isolated morning showers, then partly sunny with scattered afternoon showers. Highs run 88 to 93 near the shore and around 79 above 3,000 feet, with east winds up to 20 mph and a 50 percent chance of rain.
South Kauai is breezy and partly sunny with scattered showers, highs of 81 to 91, and northeast winds of 15 to 20 mph. East Kauai is mostly cloudy with scattered showers, highs of 79 to 87, and northeast winds of 10 to 15 mph. Both carry a 50 percent rain chance.
North Kauai is partly sunny with scattered showers, highs of 72 to 88, and east winds up to 15 mph. The mountains are wettest: mostly cloudy with numerous showers, highs of 75 to 83 in the valleys and around 69 above 4,000 feet, and a 70 percent chance of rain.
Will Tropical Storm Moke hit Kauai?
No. Moke is tracking several hundred miles south of the islands. Its center was more than 300 miles south-southwest of Kailua-Kona, with deep moisture largely skirting just south of the Big Island.
That northern moisture brings a flash-flood risk on the Big Island. Less rain is expected on windward Maui through Kauai. An earlier Kauai Now forecast said flooding prospects for Molokai, Oahu, and Kauai appeared quite limited.
Locally strong trades ease slightly Monday, then fall to moderate strength Tuesday as Moke moves west. Drier trade-wind weather should hold for the rest of the week. Forecast guidance still shows large variation in Big Island rainfall totals, so flood confidence there is lower than normal.
Those model swings are the kind of data-driven story our Future Tech & AI Wonders desk follows. For Kauai, the takeaway is passing windward showers, not a landfall.
What watches, winds, and surf are in effect?
No Kauai-specific flood watch or wind advisory is listed. A Wind Advisory runs until midnight HST for parts of Maui County and the Big Island. A Flood Watch is posted for the Big Island through Monday afternoon.
A Small Craft Advisory for all Hawaiian waters is extended through 6 AM HST Monday, and a Tropical Storm Warning remains for the offshore waters. East and east-southeast surf should trend down a notch Monday but stay elevated and choppy. A three-to-four-foot south swell arrives Monday and Tuesday, while a small west-to-north swell from Hurricane Lala should trend down.
Monday night, west Kauai turns partly cloudy with scattered evening showers, then isolated showers after midnight and shoreline lows of 74 to 82. Humidity stays higher than normal from Moke's northern moisture. A typical summertime trade pattern returns Tuesday.