Portland started the day on the mild side under clear skies, but that comfortable morning is not sticking around. By this afternoon, temperatures are expected to soar, with highs near 93°F on Monday and a heat advisory stretching across the metro area and nearby valleys.
Heat Advisory Details
According to NWS Portland, interior valleys could see temperatures climb into the mid‑90s, with some locations forecast to reach about 93–97°F. The advisory runs from 11 a.m. Monday through 11 p.m. Tuesday and warns that hot conditions could lead to heat illness for people who are sensitive or who do not have access to cooling. Officials recommend drinking plenty of fluids, staying in air conditioning or another cool space during the hottest part of the day, and checking on neighbors and vulnerable community members.
Afternoon Winds Pick Up
Light northerly winds are expected to build through the afternoon, generally around 3–9 mph, with gusts up to 18–20 mph in more exposed spots and along the I‑5 corridor. Overnight lows will only slip into the low 60s across valley floors, providing limited relief for many Portland neighborhoods. Tuesday is expected to be the peak of this warm spell with highs near 96°F, followed by a gradual cooldown beginning Wednesday.
Where To Cool Off
Multnomah County has opened two daytime cooling centers and lists dozens of libraries and community spaces as options for those needing a break from the heat. Residents can call 3‑1‑1 to find locations and learn about eligibility. The county also notes that some residents may be able to apply for free cooling units through June 30.
Late Week Outlook
According to NWS Portland, an upper‑level trough is expected to move in from Thursday into the weekend, bringing a cooler and wetter stretch. The best chance for measurable rain arrives late Thursday night into Friday, with scattered thunderstorms possible on Saturday. Out on the water, Small Craft Advisories remain posted for marine areas south of Cape Falcon through early Tuesday, and seas are forecast to stay choppy into midweek.
