Seattle woke up on Sunday, April 26, 2026, to crisp, clear skies and temperatures lingering in the low 40s at sunrise, with light east winds drifting across local airports. By afternoon, the sun is expected to pull highs into the mid-60s, setting the stage for a pretty ideal day to be out and about around the city.
Frost Advisory This Morning
Before you get too cozy with the sunshine, there is a Frost Advisory in effect through 10 AM PDT Sunday for parts of south Puget Sound, including the lowlands of King County. Sheltered spots could slip down to near freezing, which is bad news for tender outdoor plants and early garden experiments. “Temperatures as low as 32 degrees will result in frost formation,” and the National Weather Service Seattle is urging residents to cover potted plants and early crops.
Sunny Afternoons, Light Northwest Winds
For the rest of Sunday, expect plenty of sun and a high near 65°F, with northwest winds running a light 2 to 6 mph. It should feel comfortable for midday outdoor plans, though shady spots will still have a bit of a chill. Monday looks a bit cooler, with more clouds around and highs near 60°F. After that, the forecast trends warmer through midweek, with some neighborhoods potentially flirting with 70°F by Thursday.
Boaters and Gardeners Take Note
Out on the water, sea conditions off the coast are running around 4 to 6 feet this weekend and are expected to build toward 6 to 8 feet early next week. Mariners should keep an eye on updates and secure any loose gear before heading out. Low clouds or fog could develop along the coast Sunday morning, which may cut visibility and make things trickier for small craft. For the latest marine outlook, check the NWS marine discussion.
