Portland woke up under a cool, gray blanket Sunday, with KPDX reporting about 55°F early this morning. That comfy start will not last. A strong ridge parked offshore is sliding into play and is set to crank up the thermostat this week, turning today’s cloudy morning into a sunny afternoon near 84°F. The real story arrives Monday and Tuesday, when a Heat Advisory blankets the metro area, nearby lowlands and inland highs surge into the mid to upper 90s.
What To Expect
Sunday shapes up mostly sunny with a high around 84°F and light north-northwest breezes. According to the National Weather Service Portland, highs should jump to about 94°F on Monday, June 22, and push to around 98°F on Tuesday, June 23. A Heat Advisory will be in effect from 11 a.m. Monday through 11 p.m. Tuesday. Overnight lows will only slip into the 60s, which means limited cooling after dark across the Willamette Valley.
Heat Risk And Local Resources
Hot afternoons paired with warm nights significantly raise the risk of heat-related illness, especially for older adults, infants, people with chronic health conditions and anyone without air conditioning. Multnomah County and the City of Portland keep updated lists of cooling centers and will open staffed locations as needed. Residents are urged to call 211 or check local resources for specific sites and hours, as outlined by Multnomah County. Outdoor workers should front-load heavy labor into the early morning and take frequent breaks in shade with plenty of water.
Winds, Coast And Commute
The marine layer hugging the coast should clear inland this afternoon, but northwesterly winds are expected to strengthen into early next week. Inland gusts may reach around 20 mph, with stronger winds over the outer waters. Boaters can look for choppy seas of 5-7 feet and Small Craft Advisories offshore through Tuesday. Inland commuters might notice some wind gusts during the afternoon drive, but widespread travel disruptions are not anticipated. If you have outdoor plans, consider shifting events to earlier in the morning or later in the evening to dodge the worst of the heat and wind.
Bottom line: cool and comfortable today, then very hot by midweek, so plan ahead, check on vulnerable neighbors and know where you can go to cool off. Drink plenty of water, never leave children or pets in vehicles, and keep an eye on updates from the National Weather Service and local officials as the heat ramps up.
