Seattle woke up on Saturday, April 18, 2026, to clear skies, crisp air and local stations showing temperatures hovering around 45°F. By afternoon, the city is in for plenty of blue sky, with highs near 67°F and light northwest winds setting up a comfortable, easygoing day outside.
Afternoon Sunshine And Mild Temps
Any lingering morning clouds are expected to thin out, letting temperatures climb into the mid to upper 60s this afternoon. Many neighborhoods should nudge into the lower 70s by Monday, April 20, before the pattern takes a cooler, wetter turn.
A low sitting offshore is forecast to slide inland late Monday, bringing a better shot at light rain Tuesday and Wednesday and knocking daytime highs back into the mid 50s by midweek. Coastal areas could pick up a few light showers, with seas building to around 5–7 ft. River flooding is not in the cards right now, and there are no watches or warnings in effect, according to the latest outlook from the National Weather Service.
What This Means For Your Plans
Weekend events, farmers markets and outdoor patios are all looking like solid bets. Dress in layers to handle the cool start, and plan on a light jacket once the sun dips in the evening.
Mariners should be ready for choppier conditions beyond about 30 nautical miles and possible small craft gusts over the outer coastal waters. It is a good idea to check the marine forecast before heading out. For commuters, roads should stay dry today, though some cooler pockets may linger during the early morning drive.
In short, enjoy the sun while it is here. Sunglasses and sunscreen will come in handy this afternoon, and keeping a light sweater close by will help with the chillier mornings and evenings. Updates will follow if the forecast takes a turn.
