Portland rolled out of bed on Monday, April 27, under a stubborn marine layer, with a blanket of low clouds and a cool start near 46°F at Portland International Airport. The gray should thin out as the day goes on, with afternoon sunshine helping inland highs climb to about 64°F while the coast lingers a few degrees cooler. Light southwest breezes will take the edge off the morning chill and make the afternoon feel noticeably milder.
Morning Marine Layer And Commute
Low clouds and stratus are pushing inland from the coast this morning and could hang low enough to be a nuisance for early commuters. Forecasters put the odds at about 40 to 60 percent that ceilings dip into MVFR territory at PDX and other valley terminals between roughly 5 a.m. and 11 a.m. Monday, April 27. Expect damp bridges, shaded side streets, and a generally murky start. For detailed timing and aviation notes, check NWS Portland.
Afternoon Clearing And Gorge Gusts
As daytime heating kicks in, the marine layer should erode along the I-5 corridor, letting most neighborhoods warm into the low to mid 60s under brighter skies. The Columbia River Gorge and Upper Hood River Valley look windier than the rest of the metro, with gusts expected to reach 25 to 35 mph this afternoon that could turn stretches of I-84 into a bumpy ride. It is a continuation of the pattern we highlighted when Portland shed its gray skies last week.
Midweek Warm-Up And Marine Conditions
High pressure builds in the middle of the week, nudging temperatures higher each day. Highs should reach the low 70s on Wednesday and the upper 70s on Thursday, with a decent shot at 80°F for parts of the I-5 corridor by late Thursday. Out on the water, boaters can expect choppy conditions to stick around, with isolated small-craft gusts near 20 to 25 kt and seas holding near 6 to 7 ft late each day through the week. For the full forecast stretching into the weekend, see NWS Portland.
