Seattle to Portland — Weather & Driving Conditions
Driving from Seattle, WA to Portland, OR? This 174-mile route follows I-5. TripCaptain checks the weather at every stop along the way — not just at each end — so you can see where conditions change before you pick a departure time.
What to watch for on this route
A long drive crosses more than one weather system. TripCaptain flags black ice, dense fog, heavy snow, high wind, heavy rain, and low visibility segment by segment between Seattle, WA and Portland, OR, and gives the trip a clear Hazard Score™ — a 0-100 read where higher is safer.
Pick the safest time to leave
The same 174-mile drive can be calm at one hour and risky two hours later. Compare departure windows for Seattle to Portland and choose the one with the lowest risk and the arrival time you want.
Fuel, EV range, and rest stops
See a weather-adjusted fuel or EV energy estimate for the drive, sensible break points across the 174 miles, and a packing list matched to the conditions ahead.