The National Weather Service in Honolulu has issued a forecast indicating that a high-pressure system will remain in place north of Hawaii for several days. This system is expected to produce a mix of weather conditions, including increasing trade wind speeds peaking on Sunday, passing showers throughout the week, and drier conditions over the weekend. Wind speeds are forecast to approach advisory thresholds, pointing to breezy and locally windy conditions during the weekend. A low-level trough is also expected to drift westward toward the islands later in the week, according to the latest updates.
For those on the water, maritime conditions are set to change in stride with the weather. The Small Craft Advisory for select waters and channels has been extended through early Friday morning due to the continued presence of moderate to strong trades. The NWS report anticipates a slight weakening of these winds by Friday, but an upturn is expected over the weekend as the high pressure system fortifies. As such, sailors and boaters should take heed of potentially expanding SCA conditions.
A slight increase in surfing conditions is expected for the south shores as a long-period south swell reaches its peak. The forecast indicates a possible rise in surf heights beginning Monday, potentially reaching advisory levels, with elevated surf continuing through much of next week. The NWS advises caution for beachgoers, as conditions along east-facing shores are predicted to become choppy, despite a short break on Friday.
AIRMET Sierra remains in effect, warning of mountain obscurations over parts of Oahu, Molokai, Maui, and the Big Island, with conditions expected to clear later in the morning. This advisory impacts both aviation and ground visibility, reflecting the variable atmospheric conditions in Hawaii as trade winds bring clouds and brief showers, especially over windward and mountainous areas. While the forecast indicates a period of drier air and reduced humidity, fire risk is elevated due to increasing wind speeds expected on Sunday.
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