4th of July weekend weather should be relatively quiet, with decreasing humidity, typical summertime trades

It looks to be a relatively quiet holiday weekend for Hawai‘i weather, gradually becoming less soggy as humidity is expected to decrease, meaning there should be few impacts from weather during the wide variety of Fourth of July activities and events happening around the island.

Forecaster Genki Kino with the Honolulu forecast office of National Weather Service said the afternoon of July 2 in a Fourth of July weekend forecast outlook that typical summertime trade wind weather is expected throughout the next few days, with trades gradually increasing and becoming breezy at 15 to 20 mph by July 5.

“Some light passing showers will be possible over windward and mauka areas,” said Kino in an afternoon of July 2 holiday weekend weather outlook. “Leeward areas should remain mostly dry.”

Humidity levels — which have been relatively high lately and one of the reasons it has felt hotter and stickier — also will trend drier beginning July 3 and into the weekend, with minimum humidity expected to get down into the mid-40s for leeward areas.

A moderate long-period south swell will slowly fill in July 4 and peak late Sunday into July 6 near high surf advisory thresholds. Surf heights of 6 to 10 feet will be possible along south facing exposures.

Tropical Storm Douglas in the East Pacific became a post-tropical cyclone as of 11 p.m. July 2. The system is moving north-northwest near 8 mph, with a turn to the northwest expected later Friday and Saturday.

Check out the latest about what remains of Douglas at the National Hurricane Center website (https://www.nhc.noaa.gov/).

“The main headlines expected this weekend will be a small craft advisory for our typical windy waters around Maui County and the Big Island,” Kino said. “Also, we may see a high surf advisory for [south-] facing shores across the state for Sunday into Monday of next week.”

Visit the National Weather Service Honolulu forecast office website and follow the office on Facebook and X.

“Have a safe and happy [Fourth] of July weekend!” Kino said.