West Kaua’i

Tonight: Partly cloudy. Isolated showers after midnight. Lows around 63 near the shore to around 53 above 3000 feet. Northeast winds 10 to 15 mph. Chance of rain 20 percent.

Monday: Mostly sunny with isolated showers. Highs around 79 near the shore to around 66 above 3000 feet. Northeast winds up to 15 mph. Chance of rain 20 percent.

Monday Night: Partly cloudy with isolated showers. Lows around 65 near the shore to around 55 above 3000 feet. Northeast winds 10 to 15 mph. Chance of rain 20 percent.

South Kaua’i

Tonight: Partly cloudy. Breezy. Isolated showers in the evening, then scattered showers after midnight. Lows around 63. Northeast winds 15 to 20 mph. Chance of rain 30 percent.

Monday: Breezy. Partly sunny with scattered showers. Highs 74 to 80. Northeast winds 15 to 20 mph. Chance of rain 40 percent.

Monday Night: Mostly cloudy in the evening then becoming partly cloudy. Scattered showers. Lows around 65. Northeast winds around 15 mph. Chance of rain 40 percent.

Kaua’i Mountains

Tonight: Breezy. Mostly cloudy with scattered showers. Lows 55 to 62 in the valleys to around 50 above 4000 feet. Northeast winds 10 to 20 mph decreasing to up to 20 mph after midnight. Chance of rain 50 percent.

Monday: Breezy. Partly sunny with scattered showers. Highs 67 to 73 in the valleys to around 58 above 4000 feet. Northeast winds up to 20 mph. Chance of rain 50 percent.

Monday Night: Breezy. Mostly cloudy with scattered showers. Lows 57 to 64 in the valleys to around 53 above 4000 feet. Northeast winds 15 to 20 mph. Chance of rain 50 percent.

North Kaua’i

Tonight: Breezy. Mostly cloudy with scattered showers. Lows 57 to 66. Northeast winds 10 to 20 mph. Chance of rain 50 percent.

Monday: Partly sunny with scattered showers. Highs 69 to 78. Northeast winds 10 to 15 mph. Chance of rain 50 percent.

Monday Night: Mostly cloudy with scattered showers. Lows 58 to 67. Northeast winds 10 to 15 mph. Chance of rain 50 percent.

East Kaua’i

Tonight: Mostly cloudy with scattered showers. Lows 57 to 68. Northeast winds 10 to 15 mph. Chance of rain 50 percent.

Monday: Breezy. Partly sunny with scattered showers. Highs 67 to 78. Northeast winds 10 to 20 mph. Chance of rain 50 percent.

Monday Night: Breezy. Mostly cloudy with scattered showers. Lows 59 to 69. Northeast winds 10 to 20 mph. Chance of rain 50 percent.

Detailed Forecast

Synopsis

Breezy and gusty northeast trade winds will prevail through Tuesday before decreasing a notch midweek, then becoming light and variable heading into next weekend. A cool and dry airmass should keep showers light and over windward and mauka areas for the next few days, except windward areas of the Big Island where lingering moisture could keep scattered showers through Monday. A cold upper trough may slightly enhance trade wind showers during the overnight and early morning hours each day this week.

Short term update

Issued at 802 PM HST Sun Mar 29 2026
No amendments were necessary as the latest forecast remains on track. Persistent moderate to locally breezy northeasterly trades prevail across the Hawaiian Islands this evening. Any shower activity will be light and restricted to windward and mauka locations.

Prev discussion

A 1034 mb high to the far northwest and a 1011 mb low to the far northeast are continuing to drive breezy and gusty northeast trade winds across the state this afternoon. Current observations (as of 3 PM HST) show northeast trade winds gusting to between 30 and 40 mph across some of the windier areas statewide. Breezy and gusty trade winds are expected to remain in place for the next few days as the high to the northwest remains nearly stationary. Model guidance continues to keep wind speeds below Wind Advisory criteria (sustained speeds of 30-39 mph and gusts 50-57 mph), though a few of the typically windier spots across the state may edge up pretty close to criteria at times this afternoon through Tuesday.
With drier air filtering across the state, shower activity is limited this afternoon, with low level clouds and a few showers focusing over windward Maui and the Big Island, where the greatest amount of moisture resides. Generally, in this breezy northeasterly trade wind pattern, clouds and light showers will favor north and east facing coasts and slopes, particularly during the overnight to early morning period. These showers may become slightly enhanced (produce brief moderate rainfall) at times as an upper level trough edges over the state and brings much cooler temperatures aloft. However, limited moisture, along with the relatively strong low level temperature inversion under the surface ridge, will help to keep shower activity limited.
By midweek, the high pressure to the northwest is forecast to weaken and move east, which in turn will allow the trade winds to ease. Next weekend could see light and variable winds as the pressure gradient backs off further. With a weak upper level trough swinging quickly through Friday into Saturday, shower activity may be enhanced slightly, though moisture still looks to remain limited and low level forcing, minimal.

Aviation

Issued at 802 PM HST Sun Mar 29 2026
Moderate to breezy NE trades persist for the forecast period. Low cigs and SHRA possible across windward and mauka locations. MVFR conds in heavier SHRA however VFR prevails.
AIRMET Tango is in effect for mod turb downwind of terrain. It is also in effect for mod turb from Maui to Big Island between FL240-FL360 due to the subtropical jetstream positioned near the area. This area of mid- upper level turb will persist through tonight, and potentially strengthen tomorrow.

Marine

Strong high pressure NNW of the islands and low pressure to the NE maintain fresh to strong NE trades through Monday. The gradient then relaxes as the low dissipates allowing winds to ease and veer to the E as the high settles to the N through midweek. The Small Craft Advisory for all waters due to winds and seas remains in effect through tonight.
The aforementioned low is directing a moderate to large short period NNE (020) swell that will peak tonight. Given recent observations at NDBC Buoy 51000, surf will reach the High Surf Advisory (HSA) threshold for N facing shores, select exposed E facing shorelines, and West Maui. A High Surf Advisory has therefore been issued for these zones. This swell will slowly decline through the week.
The Marine Weather Statement remains in effect beginning at 6pm today for harbor surges due to the NNE swell, particularly for Hilo and Kahului Harbors.
Surf along E shores remains short period and choppy due to steady trade winds with select shorelines also seeing exposure to the imminent NNE swell. For S shores, a small medium period swell will provide small surf for the next few days. Surf along W shores remains small.

HFO Watches/Warnings/Advisories

High Surf Advisory until 6 PM HST Monday for Big Island East, Big Island North, Kauai East, Kauai North, Koolau Windward, Maui Central Valley North, Maui Leeward West, Maui Windward West, Molokai North, Molokai Windward, Niihau, Oahu North Shore, Olomana, Windward Haleakala.
Small Craft Advisory until 6 PM HST Monday for Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters, Big Island Windward Waters, Kaiwi Channel, Kauai Channel, Kauai Leeward Waters, Kauai Northwest Waters, Kauai Windward Waters, Maalaea Bay, Maui County Leeward Waters, Maui County Windward Waters, Oahu Leeward Waters, Oahu Windward Waters, Pailolo Channel.

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Data Courtesy of NOAA.gov