Seattle is starting Thursday under clear skies and a classic cool, damp morning, with temperatures hovering near 57°F at Boeing Field. That muggy chill will not last long. By this afternoon, most of the city should be basking in bright, mostly sunny conditions with highs around 76°F, with cooler readings hanging on near the waterfront.
Afternoon Breeze And Forecast
A north breeze will kick in this afternoon at about 5 to 10 mph, increasing to roughly 8 to 12 mph on exposed waterfronts and bridges, just enough to make the midday commute feel a bit windier. The National Weather Service is calling for a high close to 76°F today, followed by a warmer Friday (Juneteenth, June 19) when many spots are expected to top out near 82°F.
After that, a weak system and a morning marine push slide in and cool Saturday by about 5 to 10 degrees. Out on the water, conditions stay choppy, and a small craft advisory remains posted through early Friday for both offshore and near-shore zones. For full forecast details and marine products, see the National Weather Service Seattle office.
Heat Risk Next Week
A stronger ridge builds over the region Monday and Tuesday, sending inland highs into the 80s and even the lower 90s in some Eastside and inland valleys on Monday, June 22 and Tuesday, June 23. Forecast discussion points to a moderate heat risk for interior locations, with minimum relative humidity expected to sink below 30 percent, and in some spots into the teens. That combo raises quick-ignition concerns for dry grass and brush.
For anyone without air conditioning, King County and the City of Seattle maintain cooling options and heat safety guidance. You can dial 2-1-1 or visit City of Seattle heat resources to track down nearby cooling centers and practical tips.
Practical Tips
Planning ahead will help: shift outdoor chores to the morning or evening hours Monday and Tuesday, stay hydrated, and check in on neighbors and pets during the peak afternoon heat. Boaters should heed the coastal advisory through Friday morning and keep a close eye on the marine forecast before heading offshore.
