Seattle Set To Sizzle As Early Heat Bears Down On Neighborhoods

Seattle woke to clear skies and about 52°F at Boeing Field early Thursday, June 11, 2026, a cool start that will not last long. Expect sunshine for most of the day with a high near 70°F and light north-northwest breezes, while shoreline neighborhoods run a few degrees cooler. Patchy low clouds or fog could hang on near the Kitsap Peninsula into mid-morning before finally burning off. Boat operators should be ready for choppier conditions this afternoon as winds pick up.

Sun Today, Steady Warm-Up This Weekend

An upper-level ridge will build offshore, setting up a steady warm-up that pushes temperatures into the mid 70s Saturday and the 80s by Sunday and Monday. Some inland neighborhoods could see mid 80s on Sunday and low 90s by Monday, making early-season record highs possible, according to the National Weather Service Seattle. Overnight lows will stay mild in the mid 50s to low 60s, which means less of a cool-down at night for households without air conditioning.

Heat Safety And Local Resources

The NWS has flagged a Moderate HeatRisk for Sunday and Monday, with elevated chances of Major HeatRisk across parts of the Southwest Interior and Lower Chehalis Valley, so people without reliable cooling are urged to plan ahead. The City of Seattle recommends visiting cooling centers, limiting strenuous activity during peak heat, and checking on older neighbors and people with health conditions. If you need help finding a cooling spot, call 2-1-1 or visit local libraries and community centers that offer air-conditioned space.

Boaters And Waterfront Users

Small Craft Advisories are in effect this afternoon into tonight for parts of the Strait of Juan de Fuca, from about 2 p.m. Thursday to 1 a.m. Friday on central waters and later this evening for the east entrance, with gusty westerlies and choppy seas making exposed routes risky. Wear a life jacket, avoid small-vessel travel in exposed areas, and check the latest marine forecast before heading out. If you have outdoor plans near the water, consider rescheduling or shifting to more protected harbors.