Seattle/ Weather & Environment

Seattle Sizzles in 80-Degree Sun as Cascade Fire Danger Flashes Red

AI Assisted Icon
Published on August 13, 2026
Seattle Sizzles in 80-Degree Sun as Cascade Fire Danger Flashes RedSource: Google Street View

Seattle is waking up clear and near 60 degrees Thursday, with mostly sunny skies and a warm afternoon ahead. Temperatures should climb into the upper 70s by midafternoon before topping out near 80, making for an easy day to spend outside in the city.

Sunny, Warm Afternoon Ahead

A few low clouds may briefly linger early, but they should break up quickly and give way to brighter skies by late morning or midday. Winds will stay light at around 5 mph, shifting from west-southwest to west and northwest through the afternoon.

Thursday night will be mostly clear with a low near 60. Friday looks nearly identical, with mostly sunny skies, a high near 80 and another comfortable evening.

Dry Weekend Gives Way To A Cooler Turn

Saturday and Sunday remain mostly sunny, with highs near 78 and 79 degrees and overnight lows in the upper 50s. Monday turns partly sunny with a high around 77, while Tuesday and Wednesday trend cooler in the mid-70s.

There is only a slight chance of rain late Tuesday night and Wednesday, but the shift will bring more clouds and a noticeably less summery feel. Smoke will remain aloft through at least Friday, though onshore flow should keep surface conditions from becoming especially hazy in Seattle.

Red Flag Warning Covers Higher Mountain Terrain

Seattle's lowlands are expected to stay dry, but the National Weather Service has issued a Red Flag Warning from noon through 9 p.m. Thursday for portions of the Olympic and Cascade mountains. The warning covers higher terrain where thunderstorms could produce gusty, erratic winds without much rain, creating a serious wildfire concern, according to the National Weather Service Seattle office.

Anyone heading into the mountains should check fire restrictions before leaving, avoid activities that could create sparks and be prepared for rapidly changing conditions near storms.