Portland is starting Tuesday under cloudy skies near 61 degrees, but the bigger weather story arrives a day later: a wet Wednesday followed by a genuine thunderstorm chance Thursday. The city gets one more mostly manageable afternoon before a notably cooler, wetter stretch takes over.
Tuesday Stays Mostly Dry Before Clouds Thicken
Tuesday’s forecast calls for mostly cloudy skies, with a high near 73 and only a 12% chance of rain. Some afternoon brightness is possible as temperatures peak, while a south-southwest breeze stays around 6 mph; overnight lows dip to about 58, with gusts potentially reaching 20 mph. For commuters and outdoor plans, the main nuisance is likely the gray sky rather than wet pavement.
Wednesday Brings The Big Weather Turn
Rain is expected after 7 a.m. Wednesday, with a 100% chance of precipitation, a high near 65 and new rainfall totals of roughly a quarter to half an inch. The National Weather Service in Portland is also calling for south winds of 7 to 12 mph, with gusts as high as 25 mph. Rain continues Wednesday night, when temperatures fall to around 54 and another quarter to half an inch may be possible.
Thursday Could Add Thunder To The Mix
Thursday stays unsettled, with rain before 11 a.m. followed by showers and possible thunderstorms and a high near 64. Forecasters put the chance of precipitation at 90%; any storm that develops could bring lightning, a burst of heavy rain, erratic wind and small hail. Keep outdoor plans flexible, especially after late morning, and head indoors if thunder rolls in.
Forecast Timing Has Shifted Since Monday
The updated outlook is a meaningful change from Hoodline’s earlier update, which had rain arriving Tuesday and a wetter setup sooner. The latest forecast instead keeps Tuesday mostly dry and concentrates the heaviest city impacts on Wednesday and Thursday. For anyone planning a coast trip, a Gale Warning is posted for coastal waters from 11 p.m. Tuesday through 5 p.m. Wednesday.
Cooler, Showery Weather Lingers Into Labor Day
Friday looks less intense but still carries a 46% chance of light rain and a high near 68. Saturday and Sunday rebound into the low to mid-70s, though rain chances remain in the forecast, and Labor Day tops out near 73 with a lingering chance of showers. Summer is not exactly canceled, but it is taking a long weekend.
