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.
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.
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.
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.
