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Kauai Weather

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Waimea, Kauai Weather

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Tonight

72° F
Partly Cloudy
Wind 5 to 9 mph ENE

Thursday

90° F
Mostly Sunny
Wind 5 to 12 mph ENE

Thursday Night

72° F
Partly Cloudy then Isolated Rain Showers
Wind 6 to 9 mph ENE

Friday

90° F
Mostly Sunny
Wind 6 to 13 mph ENE

Friday Night

72° F
Partly Cloudy
Wind 6 to 9 mph ENE

Saturday

90° F
Mostly Sunny
Wind 6 to 13 mph ENE

Saturday Night

72° F
Partly Cloudy
Wind 13 mph ENE

Sunday

91° F
Mostly Sunny
Wind 14 mph E

Sunday Night

73° F
Partly Cloudy
Wind 14 mph ENE

Monday

91° F
Mostly Sunny
Wind 12 mph ENE

Monday Night

72° F
Partly Cloudy
Wind 13 mph ENE

Tuesday

90° F
Mostly Sunny
Wind 13 mph E

Tuesday Night

73° F
Mostly Clear
Wind 13 mph ENE

Wednesday

91° F
Sunny
Wind 13 mph ENE
Cloud Weather Radar

Regional Kauai Weather Forecast July 09, 2025


no slideshow
Photo Credit: Karsten Winegeart

West Kaua’i

Rest Of Tonight: Partly cloudy. Breezy. Isolated showers. Lows 68 to 73 near the shore to around 60 above 3000 feet. East winds 10 to 20 mph. Chance of rain 20 percent.

Wednesday: Mostly sunny. Isolated showers in the morning. Highs 85 to 91 near the shore to around 78 above 3000 feet. East winds 10 to 15 mph. Chance of rain 20 percent.

Wednesday Night: Partly cloudy. Isolated showers in the evening, then scattered showers after midnight. Lows 68 to 73 near the shore to around 61 above 3000 feet. East winds 10 to 15 mph. Chance of rain 50 percent.

South Kaua’i

Rest Of Tonight: Mostly cloudy. Breezy. Isolated showers early in the evening, then scattered showers. Lows 69 to 74. Northeast winds 15 to 20 mph. Chance of rain 50 percent.

Wednesday: Partly sunny with scattered showers in the morning, then mostly sunny with isolated showers in the afternoon. Highs 81 to 90. East winds around 15 mph. Chance of rain 50 percent.

Wednesday Night: Mostly cloudy. Scattered showers in the evening, then numerous showers after midnight. Lows around 72. Northeast winds 10 to 15 mph. Chance of rain 70 percent.

Kaua’i Mountains

Rest Of Tonight: Breezy. Mostly cloudy with scattered showers. Lows 63 to 68 in the valleys to around 57 above 4000 feet. East winds 10 to 20 mph. Chance of rain 50 percent.

Wednesday: Partly sunny. Breezy. Numerous showers in the morning, then scattered showers in the afternoon. Highs 76 to 85 in the valleys to around 68 above 4000 feet. East winds 10 to 20 mph. Chance of rain 70 percent.

Wednesday Night: Mostly cloudy. Breezy. Scattered showers in the evening, then numerous showers after midnight. Lows 63 to 68 in the valleys to around 58 above 4000 feet. East winds 10 to 20 mph. Chance of rain 70 percent.

North Kaua’i

Rest Of Tonight: Mostly cloudy with scattered showers. Lows 63 to 73. East winds 10 to 15 mph. Chance of rain 50 percent.

Wednesday: Partly sunny with scattered showers in the morning, then mostly sunny with isolated showers in the afternoon. Highs 78 to 88. East winds 10 to 15 mph. Chance of rain 50 percent.

Wednesday Night: Mostly cloudy with scattered showers. Lows 64 to 72. East winds 10 to 15 mph. Chance of rain 50 percent.

East Kaua’i

Rest Of Tonight: Mostly cloudy with scattered showers. Lows 62 to 75. Northeast winds 10 to 15 mph. Chance of rain 50 percent.

Wednesday: Partly sunny with scattered showers. Highs 74 to 87. East winds 10 to 15 mph. Chance of rain 50 percent.

Wednesday Night: Mostly cloudy. Scattered showers in the evening, then numerous showers after midnight. Lows 63 to 75. East winds 10 to 15 mph. Chance of rain 70 percent.

Detailed Forecast

Update

Based on recent observations across Maui County and the Big Island and given the latest guidance will let the Wind Advisory expire on time as winds continue to weaken. However, may continue to see some isolated advisory winds in the most wind prone areas tonight, but widespread advisory winds are not anticipated.

Synopsis

A strong high pressure ridge north of the Hawaiian Islands will continue to produce breezy to windy trade winds through this evening, with the strongest winds focused across Maui County and the Big Island. Dry weather conditions will combine with these strong gusty winds to keep elevated fire danger across the state through this evening, mainly over the drier leeward slopes. Winds will ease starting Wednesday, with a ridge aloft confining brief passing showers to mainly windward and mauka areas.

Discussion

Strong high pressure north of the Hawaiian Islands will maintain breezy to windy easterly trade winds across the state. A Wind Advisory remains in effect through this evening for the windier areas of Maui and Hawaii Counties; including the summits of Mauna Kea and Mauna Loa on the Big Island. Given the latest trends and model guidance will likely let the Wind Advisory expire at 6 PM this evening, but would not be surprised to see isolated advisory gusts continue into tonight.
In addition, the relatively dry humidity levels will combine with the strong winds to keep elevated fire weather conditions across the state, mainly over drier and windier leeward areas. Please refer to the Fire Weather section below for more details.
Satellite imagery this afternoon continue to show bands of fairly stable clouds moving into windward and mauka areas, with radar imagery showing light passing showers moving across the islands. The ridge aloft continue to keep inversion heights around 5,000 to 6,000 feet this afternoon based on soundings at Hilo and Lihue.
The pattern will begin to change tonight into Wednesday as high pressure north of the state weakens. This will allow our strong winds to gradually weaken overnight, with moderate to breezy trades expected for the rest of the week. As the high weakens will also see the inversion lift back to around 7,000 to 8,000 feet. This will allow clouds to grow higher, with a return towards typical summer time trade wind weather expected. An upper level low just southwest of the islands will help to enhance sunrise and sunsets as cirrus clouds stream across the region.

Aviation

Strong and gusty trades continue through this afternoon and then ease on Wednesday. High stability favors continued scattered light showers with a high coverage of overnight cloud cover windward and mauka where the occasional MVFR condition will be possible. Otherwise, VFR prevails.
AIRMET Tango remains for lee turb remains in effect.

Marine

High pressure far northeast of the islands will support fresh to strong trades across the area. A Small Craft Advisory (SCA) is now in effect for all Hawaiian coastal waters through 6 AM HST Wednesday. The surface high will move eastward and weaken slightly during the second half of the week, but winds are likely to remain breezy to locally strong in the windier channels and waters of Maui County and the Big Island through the rest of the week.
A small mid-period south swell will continue through Thursday. A slight boost to the period expected on Saturday. Another small, long- period swell expected next Sunday night into Monday. Surf along south facing shores will boost along with the arrival of the mentioned swells. Surf along east-facing shores will be rough and choppy due to the breezy trade winds that will persist the rest of the week.

HFO Watches/Warnings/Advisories

Small Craft Advisory until 6 AM HST Wednesday for all Hawaiian waters,

Kauai Now Weather is brought to you by Blue Hawaiian Helicopters.

Data Courtesy of NOAA.gov

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