Portland Weather Radar
Portland Live Weather
Portland Live Weather Radar
Portland Hourly Weather Forecast
Portland 7-Day Weather Forecast
Portland Weather Overview
Portland sits on the southern coast of Maine, where cold Atlantic waters and northern air masses collide to produce some of New England's most intense weather. The city's humid continental climate brings sharp seasonal contrasts — mild summers give way to long, cold winters averaging 68.7 inches of snowfall per year. Checking the Portland Maine weather radar regularly is essential from November through April, when nor'easters and winter storms can develop rapidly offshore.
Nor'easters are Portland's biggest threat. These powerful storms track up the Eastern Seaboard and slam the coast with heavy snow, coastal flooding, and wind gusts that can exceed 70 mph. Winter Storm Nemo in February 2013 dumped a record 31.9 inches of snow on Portland Jetport in a single event. The January 2024 back-to-back storms produced Portland's number one and number four all-time coastal floods within just three days. The NWS Gray/Portland office (WFO GYX) issues watches and warnings for the region — the weather radar portland maine page tracks these storms in real time as they approach.
Ice storms pose a serious secondary risk. The Ice Storm of 1998 coated Maine in one to three inches of freezing rain, knocking out power for 900,000 residents — some for over three weeks. Portland also receives about 48 inches of total precipitation annually, and spring rain combined with snowmelt can trigger localized flooding along the Fore River and Presumpscot River corridors.
Portland Weather Risks & Safety
Nor'easter Risk
Nor'easters are Portland's biggest multi-threat storms — heavy snow, powerful winds, and coastal flooding all at once. They track up the Eastern Seaboard from fall through early spring and can grind the city to a halt for 24 to 48 hours. On the radar you can see the precipitation bands wrapping around the storm center and track exactly where the heaviest snow or rain is falling. Past nor'easters have buried Portland under record snowfall with widespread power outages.
Blizzard & Heavy Snow Risk
Portland gets hit by blizzards when Arctic air combines with moisture — 12+ inches of snow, 35+ mph winds, near-zero visibility. On the radar you can watch the storm bands approach and figure out exactly when the worst will arrive. That timing matters: get your errands done before the bands reach you, and be ready for power outages and road closures that can last days.
Ice Storm Risk
Ice storms are rare in Portland but devastating when they hit. A quarter-inch of freezing rain coats everything — roads turn into skating rinks, power lines snap, trees come down. The radar shows whether you're getting rain, freezing rain, sleet, or snow — that distinction is critical. When Portland gets an ice storm warning, stay off the roads and prepare for power outages that could last several days.
Flooding & Flash Flood Risk
Flash flooding is Portland's most persistent weather hazard. Slow-moving thunderstorms or tropical moisture can dump enough rain to overwhelm drainage systems within hours — especially in paved urban areas where water has nowhere to go. Check the radar to see where the heaviest rain is falling and which areas to avoid. The standing rule: turn around, don't drown. Never drive through flooded roads, even if they look shallow.
Severe Thunderstorm Risk
Severe thunderstorms roll through Portland regularly, especially spring through early fall. Expect damaging winds above 58 mph, large hail, and dangerous lightning. The radar shows you each storm cell's position, movement, and intensity — so you can tell if one is headed your way. When a thunderstorm warning drops for Portland, get indoors and away from windows until it passes.
How to Use Portland Weather Radar
Check Current Conditions
Open the Portland Maine weather radar page and look at the weather status bar — it shows temperature, humidity, wind speed, and conditions across Portland at a glance.
Watch the Radar for Incoming Storms
Use the animated radar map to track nor'easters and winter storms approaching the Maine coast. Toggle between precipitation and cloud cover views to see where snow, rain, or ice is falling across Greater Portland.
Review the Forecast
Scroll to the hourly and 7-day forecast for Portland. Check for nor'easters, snowfall accumulation, or freezing rain in the coming days — timing matters when 30+ inches can fall in a single storm.
Plan Around the Weather
Heavy snow forecast for Portland? Adjust travel plans on I-295 and the Maine Turnpike. Coastal flood warning? Stay clear of East End Beach and the waterfront. Check back frequently during active storm events.
Who Benefits from Portland Weather Radar
Commuters & Drivers
Check radar before driving I-295 or the Maine Turnpike — spot nor'easters and icy roads on your route.
Outdoor Enthusiasts
Runners on the Back Cove Trail and Eastern Promenade — see incoming storms 30 minutes out.
Event Planners & Families
Planning events at Thompson's Point? Radar shows exactly when snow or rain hits the waterfront.
Outdoor Workers
Lobster crews and waterfront workers — check radar before heading out on Casco Bay.