Hurricane Kiko weakened to a Category 1 storm early today as it moved closer to Hawaii but is still expected to pass north of the islands Tuesday and Wednesday, bringing large surf and increased humidity.

As of 5 a.m., Kiko was about 410 miles east of Hilo and 590 miles east of Honolulu with maximum sustained winds of 85 mph, according to the Central Pacific Hurricane Center. The storm was moving west-northwest at about 15 mph. Forecasters expect Kiko to weaken into a tropical storm by tonight.

While no coastal watches or warnings are in effect, a tropical storm warning has been issued for offshore waters beyond 40 nautical miles out to 240 nautical miles, including the portion of the Papahanaumokuakea Marine National Monument east of French Frigate Shoals, where rough seas, stronger winds and isolated thunderstorms are expected through Thursday, according to the National Weather Service.

Swells generated by Kiko are expected to reach the east-facing shores of the islands today and continue building through midweek. The NWS said surf could peak at high surf warning levels on Tuesday.

Moisture from Kiko’s outer bands is expected to move into the state starting tonight, increasing clouds and bringing passing showers, mainly along windward and mauka areas. As tradewinds weaken, lighter sea breezes could trigger heavier afternoon showers Tuesday and Wednesday, and forecasters said a brief thunderstorm on Tuesday cannot be ruled out. Dew points are also expected to rise into the low to mid-70s, making conditions feel muggy across much of the islands.

By late Wednesday into Thursday, Kiko is forecast to move away to the northwest, allowing tradewinds to return. Drier air is expected to spread over the state.

Residents are urged to continue monitoring updates as Kiko passes north of the islands.