Honolulu kicks off the week on the cloudy and muggy side Monday, with temperatures hovering near 77°F as scattered showers brush windward neighborhoods. Afternoon highs should climb to about 86°F, while overnight lows hang around 78°F. Moderate east-northeast trade winds will keep things breezy, so expect quick, hit-or-miss downpours instead of an all-day soaker.
Showers Tonight Through Midweek
Two bands of enhanced moisture are lined up to sweep across the islands from Monday through Thursday, juicing up early-morning and overnight showers and nudging humidity into the lower 70s. Brief, locally heavy bursts of rain are possible over windward and mauka slopes, but with the trades holding, a widespread flash-flood setup is not on the table. Most spots will see light totals where showers do pop up. The wettest window is favored from Tuesday night into Thursday morning as the second band moves through. According to NWS Honolulu, the best shot at rain comes overnight and during the morning commute hours.
Breezy Trades And Marine Impacts
East-northeast trades should run around 12–18 mph with gusts into the mid-20s, and the usual exposed spots could feel stronger gusts later in the week. Small Craft Advisories are posted for several channels and windward waters through 6 PM HST Monday, June 29, with additional advisories extending into Tuesday, June 30 for some offshore zones, so small-boat operators will want to plan around the chop. East-facing shores will be on the rough and choppy side, and surfers can expect bumpy conditions on exposed breaks, while north shores stay relatively flat. For background, check out our earlier breezy trades forecast.
Morning Commutes And Outdoor Plans
MVFR ceilings and spotty showers are most likely in the morning hours and could briefly knock down visibility and slow commutes before conditions ease into the afternoon. A light rain layer is a smart grab-and-go item for early starts, and building in a little extra time for errands or outdoor plans will help, as humidity stays elevated through midweek. For the freshest updates on forecasts and marine notices before traveling or heading out on the water, check NWS Honolulu.
