High pressure far north of the Hawaiian islands will maintain a moderate to locally windy trade wind pattern over the region into the middle of the week. An area of showers moving in on the trades tonight will maintain passing showers over the windward and mountains into Tuesday. Moderate trades and fewer showers are expected during the second half of the week, with an increase in shower trends this weekend.
Issued at 319 PM HST Mon Oct 19 2026 Breezy trades will persist through tomorrow. Passing showers will mainly be concentrated in windward and mountain areas. These showers may produce short-lived MVFR ceilings and visibility.
AIRMET Tango remains in effect for tempo moderate turbulence downwind of terrain below flight level 090.
Issued at 319 PM HST Mon Oct 19 2026 High pressure centered far north of Hawaii will maintain fresh to strong trade winds for the next few days, and a Small Craft Advisory (SCA) remains in effect for all waters except windward Big Island through Tuesday afternoon. Trades will steadily decrease early Wednesday morning as the high weakens and is displaced eastward by an approaching low far northwest of the islands. The SCA will likely be trimmed back to the typically windy waters around Big Island and Maui at that time. Trade winds will lower to gentle strength, or may become disrupted entirely, as the low passes to the north Thursday and Friday. Trades could then turn more northeasterly this weekend.
Declining north-northwest and west-northwest swells will keep small to tiny surf in place over the next few days before a small northwest swell gives a slight bump to north shores on Thursday and Friday. This will then be followed by a slightly larger north- northwest swell this weekend and a potentially larger long period west- northwest swell early next week from a forecasted storm force low developing northeast of Japan in the next few days.
Small background south swells will keep relatively small surf for south facing shores through much of the week. A moderate south- southwest swell is expected this weekend, and could bring surf heights above seasonal averages.
Rough trade wind swell will produce east shore surf just above seasonal average through Tuesday, then decline later in the week as trade winds decrease.
Small Craft Advisory until 6 PM HST Tuesday for most Hawaiian waters and channels.
