Honolulu is expecting a dip in temperatures as a cold front is set to sweep through the region starting tonight and into Friday. According to the National Weather Service (NWS), light breezes and sea breezes are predicted across the state today, with limited showers mainly favoring windward areas of Maui and the Big Island this morning. The interior parts of the islands might see a few showers due to daytime heating in the afternoon. The approaching cold front is anticipated to disrupt the usual trade wind pattern and to gradually increase shower activity as it progresses southeastward.
Residents and visitors can expect a pleasant holiday weekend after the front moves through, with drier, more stable weather, cooler temperatures, and clearer skies. The NWS has foreseen conditions that are perfectly conducive to outdoor activities with "only a few very light showers affecting windward slopes and coasts." However, as the next weather system approaches by mid-next week, uncertainties in wind forecasts and the potential for rain will become apparent.
For those taking to the seas, mariners should be cautious as winds weaken and vary with the front nearing. A projected convergence boundary could surface near Maui and separate varying wind directions across the islands. Thunderstorms near Maui and the Big Island are possible as the front approaches and may affect local conditions. High pressure is expected to build behind the front over the weekend, resulting in a resumption of fresh to strong northeast trade winds.
The NWS reports that the current northwest swell will begin to decrease today, followed by the arrival of a new, significant swell expected to exceed warning levels by Friday. This will likely lead to High Surf Warning conditions along many north and west-facing shores. Surf along the south shore is expected to increase starting today and continue through the weekend. In contrast, east shore surf is forecast to remain small until trade winds pick up again after the frontal passage.
The fire weather outlook on land remains generally calm. The NWS indicates no immediate expectation of critical conditions, although lower humidity and potential peak winds from the north or northeast may occur on Saturday and Sunday. While these conditions could approach Red Flag criteria, they are not forecast to align in a way that would warrant alerts at this time.
