Maui Weather in October

October brings a gradual cooldown: highs ease to 78.1°F, lows to 68.6°F, while rain ticks up slightly to 17.1 days and humidity climbs to 76%.

Sea temperature stays warm at 81.4°F, still excellent for swimming and snorkeling even as the peak of summer fades.

Historically, Halloween drew huge crowds to Front Street in Lahaina for a well-known island-wide street party; following the 2023 wildfire, celebrations and access in Lahaina have changed, so check current local guidance rather than assuming the pre-2023 event still runs as it did.

Central Pacific hurricane season remains technically open through November, though no storm activity has been recorded historically for October on this island.

This is a shoulder-season month for crowds and pricing, sitting between the summer peak and the winter holiday surge, making it a reasonable value window.

The first humpback whales of the season occasionally arrive in Maui waters by late October, an early preview of the main season that builds through winter.

North shore surf continues building this month as the winter swell season approaches, drawing more experienced surfers to spots like Honolua Bay.

Pack summer-weight clothing with a light layer for cooler evenings, and check current Lahaina visitor guidance before planning time in that area.