The National Weather Service on Tuesday, July 15, 2025 issued a Heat Advisory, warning of temps possibly reaching the mid-90s on Wednesday, July 16.
“Heat will significantly increase the risk of heat-related illnesses for those who are sensitive to heat, especially those without effective cooling or adequate hydration,” NWS said.
As a ridge of high pressure lingers offshore, residents are urged to expect another round of summer heat, gusty winds and fire concerns, according to Michael Snyder of Pacific Northwest Weather Watch.
Video Forecast
“We’re in it now — warm days, gusty northeast winds and fire season in full swing,” Snyder said in a July 15 video update, noting 95-degree forecasts for Seattle and upper 90s in Portland.
Here’s Snyder’s latest forecast video:
Heat Advisory Issued
A Heat Advisory remains in effect for portions of western Washington through Wednesday night, particularly valley areas where new National Weather Service forecast zones now reflect terrain-specific warnings. Inland valleys are expected to reach the mid-90s, with overnight lows in the 60s.
Issued by: National Weather Service Seattle WA
Time: 9:23 AM PDT Tuesday, July 15, 2025
WHAT: Hot conditions with high temperatures in the 80s to low 90s today and 80s to mid 90s Wednesday. Overnight lows will remain in the low to mid 60s. This will pose a moderate risk of heat-related impacts.
WHERE: Portions of northwest and west central Washington, including:
Seattle, Kent, Renton, Federal Way, Auburn, Bellevue, Everett, Lynnwood, Marysville, Olympia, Tacoma, Bellingham, Redmond, Edmonds, Monroe, Bremerton, and surrounding areas.
WHEN: Through 10 PM PDT Wednesday, July 16.
IMPACTS: Heat may significantly increase the risk of heat-related illness, especially for vulnerable populations and those without access to cooling or adequate hydration.
PRECAUTIONARY/PREPAREDNESS ACTIONS:
- Drink plenty of fluids.
- Stay in air-conditioned rooms and out of the sun.
- Check on relatives and neighbors, especially those vulnerable to heat.
- Never leave children or pets in vehicles.
- Reschedule strenuous outdoor activities to the early morning or evening hours.
- Know the signs of heat exhaustion and heat stroke.
- Wear lightweight, loose-fitting clothing.
- Take frequent breaks in shaded or air-conditioned environments.
- If someone is overcome by heat, move them to a cool place and seek medical attention. Heat stroke is a medical emergency — call 911.
Detailed 7-Day Forecast
- Tuesday Afternoon: Sunny, with a high near 85. North wind around 10 mph.
- Tuesday Night: Clear, with a low around 63. North wind 5 to 9 mph becoming light north northeast after midnight.
- Wednesday: Sunny, with a high near 91. Calm wind becoming west northwest around 6 mph in the afternoon.
- Wednesday Night: Clear, with a low around 59. Northwest wind around 6 mph becoming light and variable in the evening.
- Thursday: Sunny, with a high near 84. South southwest wind around 6 mph becoming west northwest in the afternoon.
- Thursday Night: Mostly clear, with a low around 59.
- Friday: Mostly sunny, with a high near 81.
- Friday Night: Partly cloudy, with a low around 58.
- Saturday: Partly sunny, with a high near 75.
- Saturday Night: Partly cloudy, with a low around 57.
- Sunday: Partly sunny, with a high near 73.
- Sunday Night: Partly cloudy, with a low around 56.
- Monday: Partly sunny, with a high near 76.
Cooler temperatures and onshore flow are expected to return by Sunday, providing some relief west of the Cascades.
“Better sleeping weather is coming,” Snyder said.
