Honolulu is in for a classic summer mix this Friday, June 19, Juneteenth: mostly clear skies, a high near 88°F, and just enough humidity to remind you it is very much the tropics. East-northeast winds should cruise along around 8 to 14 mph, with gusts near 18 mph, and isolated showers could pop up after noon, mainly over interior and northwest-facing slopes. Overnight, it stays warm and muggy, with lows in the mid 70s around 76 to 77°F.
Afternoon Showers: Who Gets Splashed
A weak surface trough slipping west of Kauai will help fire up those diurnally driven showers over interior and mauka neighborhoods, with northwest Oʻahu and parts of Kauai holding the best odds for brief downpours. Most showers should be quick hitters, but if one stalls, pockets of moderate to heavy rain could develop, and a stray Flood Advisory is not off the table. For the full zone breakdown and forecast discussion, check the National Weather Service.
Tradewinds And The Week Ahead
Trade winds are expected to stay in the light to moderate range through the weekend, then ramp up from Monday into midweek. That stronger pattern will favor more reliable night and early-morning showers along windward slopes. By Tuesday and Wednesday, gusts could push into the mid 20s to upper 20s mph over ridgelines and exposed beaches, so it is a good time to plan on tying down anything loose in the yard. For background on the evolving swell and wind pattern, see this recent swell and wind trend breakdown.
Surf And Marine Outlook
A moderate, medium-period south swell will keep fading through the weekend, so south- and west-facing breaks should ease by Saturday, with a series of smaller swells keeping surf near seasonal norms into next week. North shores stay on the quieter side, and east-facing spots are likely to run below average while trades are light, though surf and currents should tick up as those winds strengthen starting Monday. Boaters and beachgoers will want to keep an eye on lifeguard updates before heading out.
