West Kaua’i

Tonight: Partly cloudy. Isolated showers in the evening. Lows around 71 near the shore to around 63 above 3000 feet. Northeast winds 10 to 15 mph. Chance of rain 20 percent.

Tuesday: Mostly sunny. Highs 84 to 90 near the shore to around 75 above 3000 feet. East winds up to 15 mph.

Tuesday Night: Mostly clear. Lows around 71 near the shore to around 63 above 3000 feet. Northeast winds 10 to 15 mph.

South Kaua’i

Tonight: Mostly cloudy with scattered showers in the evening, then partly cloudy after midnight. Lows 70 to 76. Northeast winds around 15 mph. Chance of rain 30 percent.

Tuesday: Mostly sunny. Breezy. Highs 79 to 88. Northeast winds 15 to 20 mph.

Tuesday Night: Mostly clear. Breezy. Lows 69 to 76. Northeast winds 15 to 20 mph.

Kaua’i Mountains

Tonight: Mostly cloudy with scattered showers. Lows 65 to 70 in the valleys to around 59 above 4000 feet. East winds 10 to 15 mph. Chance of rain 50 percent.

Tuesday: Breezy. Mostly sunny with scattered showers in the morning, then partly sunny with isolated showers in the afternoon. Highs 73 to 80 in the valleys to around 66 above 4000 feet. Northeast winds 10 to 20 mph. Chance of rain 40 percent.

Tuesday Night: Breezy. Partly cloudy with isolated showers. Lows 64 to 70 in the valleys to around 59 above 4000 feet. Northeast winds 10 to 25 mph. Chance of rain 20 percent.

North Kaua’i

Tonight: Mostly cloudy. Numerous showers in the evening, then scattered showers after midnight. Lows 64 to 74. East winds 10 to 15 mph. Chance of rain 60 percent.

Tuesday: Mostly sunny with scattered showers in the morning, then partly sunny with isolated showers in the afternoon. Highs 69 to 85. East winds 10 to 15 mph. Chance of rain 40 percent.

Tuesday Night: Partly cloudy. Isolated showers in the evening. Lows 64 to 74. East winds 10 to 15 mph. Chance of rain 20 percent.

East Kaua’i

Tonight: Mostly cloudy in the evening then becoming partly cloudy. Scattered showers. Lows 65 to 76. Northeast winds 10 to 15 mph. Chance of rain 50 percent.

Tuesday: Mostly sunny. Breezy. Isolated showers in the morning. Highs 76 to 84. Northeast winds 10 to 20 mph. Chance of rain 20 percent.

Tuesday Night: Partly cloudy. Breezy. Isolated showers after midnight. Lows 65 to 75. Northeast winds 15 to 20 mph. Chance of rain 20 percent.

Detailed Forecast

Synopsis

Breezy trades will become moderate to locally breezy Tuesday. Clouds and showers will be limited to windward and mauka areas with some spilling over to leeward areas. Breezy to locally windy trades will redevelop Wednesday through Thursday as a new strong surface high settles north to northwest of the state. A slight increase in windward showers is forecast late in the week as a band of moisture moves from north to south across the state. Moderate to locally breezy trades will return over the weekend.

Discussion

Radar showed isolated showers moving across windward and mauka areas, with an occasional spill over into leeward Oahu. Skies were mostly cloudy windward and mauka, and mostly sunny in most leeward areas. Winds were averaging 10-20 mph, with many coastal and higher terrain areas gusting 20-35 mph.
To our north, an upper level ridge and associated surface high will move from west to east through Friday. A new surface ridge will replace the first over the coming weekend. A narrow band of enhanced moisture is forecast by the latest operational runs of both the GFS and EC to move south over the state late Thursday into Friday. This should create a slight increase in showers through that period. Otherwise, expect trade winds and accompanying showers through the week, with wind speeds decreasing tonight and Tuesday, then increasing notably Wednesday. In fact, a Wind Advisory may be needed for some areas Wednesday. After that, winds should be moderate to locally breezy over the remainder of the week and into the weekend. Tropical Storm Pena will continue to move west, away from the state. No other tropical activity is expected.

Aviation

Moderate to locally breezy trade winds will continue through the day tomorrow with a drier airmass in place. Isolated showers along windward areas may produce brief periods of MVFR ceilings and visibilities, especially during the overnight hours.
AIRMET Tango remains in effect for moderate turbulence below 7000 feet within the lee of higher terrain. This AIRMET will likely continue through the next several days as locally breezy trade winds persist.

Marine

Fresh trade winds will continue through Tuesday as a front quickly approaches from the northwest. Trade winds will overrun this weakening feature and wind speeds will strengthen again Tuesday night. The remnant trough will move in Thursday, spreading clouds and showers across the coastal waters.
A northwest swell will continue through Tuesday night and keep moderate surf in the forecast along north and west facing shores. A much larger northwest to north-northwest swell was generated by a gale force low developing east of Kamchatka. This large north- northwest swell may bring warning level surf heights to exposed north and west facing shores building in through the day on Wednesday, peaking Wednesday night, decreasing to advisory levels on Thursday, and then falling below advisory levels by Friday. A small northwest reinforcement is expected to arrive this weekend.
Surf along east facing shores will decrease as winds taper through Tuesday, but will ramp up again by Wednesday through Friday as wind speeds pick back up. A small south swell will decline through the week.

Fire weather

Issued at 354 PM HST Mon Nov 9 2026
Near critical fire weather conditions will hold for the next several days. Breezy trade winds will gradually ease tonight and Tuesday. Relative humidity values will decrease to near threshold values Tuesday and Wednesday, and winds are forecast to be close to threshold Wednesday. Conditions during the second half of the week are expected to reach near-threshold values again as winds increase and we should have a relatively dry and stable airmass. Temperature inversion heights should remain between 6,000 and 8,000 feet from Maui County to the Big Island.

HFO Watches/Warnings/Advisories

Small Craft Advisory until 6 PM HST Tuesday for Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters, Maalaea Bay, Pailolo Channel.

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

Check out their Kaua‘i Helicopter Tours today!

Data Courtesy of NOAA.gov