Seattle is getting a bright start to Friday, June 19, with clear skies and a cool, comfortable morning. At Boeing Field (KBFI), temperatures are sitting around 63°F with light winds, and the rest of the day is on track to stay sunny with a high near 81°F. It is prime weather for Juneteenth plans earlier in the day, before the late afternoon warmth really settles in. Humidity should stay mostly comfortable, paired with a gentle north-northwest breeze through the afternoon.
Afternoon And The Week Ahead
Temperatures ease back a bit to around 76°F on Saturday, then climb again to about 80°F on Sunday. After that, a stronger warmup is expected early next week, with inland spots forecast to reach the mid 80s to upper 80s and at least a chance of a few 90°F-plus readings. The National Weather Service is already flagging a moderate heat risk for Monday, June 22, and Tuesday, June 23, and notes that a heat advisory could be issued if temperatures trend higher.
Coastal Waters And Boaters
A Small Craft Advisory is in effect for nearshore coastal waters from 1 p.m. Friday, June 19 through 11 a.m. Saturday, June 20, with additional offshore advisories stretching into Saturday afternoon. Seas are expected to build to 10 to 15 feet tonight into Saturday morning, so mariners should plan for rough conditions and adjust routes and timing accordingly.
Heat Safety And Local Resources
With warmer nights and hotter afternoons likely early next week, people who are sensitive to heat should plan ahead. That means limiting strenuous outdoor activity between about 11 a.m. and 6 p.m., staying well hydrated, and checking in on elderly neighbors or anyone with medical conditions that make heat harder to handle. The City of Seattle keeps a heat safety page with cooling locations and practical tips if you need a cooler spot during peak heat.
Tonight stays mostly clear with lows in the upper 50s, and the current dry pattern is expected to hold through Thursday. Updates will be posted if any heat advisories or additional marine warnings are issued over the weekend.
