Our Proprietary 10-Day Forecast

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Current warnings over South Portland, Maine
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<p>Warnings from F5Weather</a></div>

United States weather warnings are issued by various organizations under NOAA. Most from the National Weather Service, but also Storm Prediction Center and National Hurricane Center.

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Current radar over South Portland, Maine red dot
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<p>Live radar from F5Weather</a></div>

Our radar is based off of US NEXRAD and Canadian weather radar sites through the quality controlled MRMS system. It compiles various sources for radar data and filters out erroneous returns such as sun spikes and ground clutter. We then colorize the precipitation based on our methods for determining precipitation type. Rain is in shades of green, mixed precipitation and freezing rain in shades of pink and snow is in shades of blue.

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Current satellite over South Portland, Maine red dot
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<p>Live satellite from F5Weather</a></div>

Our satellite is from the GOES-16. It is color enhanced by using a geocolor terrain background during the day and black marble city lights at night. The daytime satellite data is Visible satellite imagery, and nighttime uses Infrared bands. The bluish clouds are fog and low cloud. The whiteest clouds are the coldest, highest cloud tops.

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Current surface weather map around Cumberland County, ME

This surface map is from the HRRR computer model. It is a 1-hour forecast, updated hourly, which is a good estimate of the current surface conditions. This map shows the current high and low pressure centers, pressure isobar contours, wind streamlines and thickness contours. It also shows the currently depicted preciptiation estimates, although this should not be a substitute for actual live radar. The purple dashed contour is the 5400m thickness line, which is often a good proxy for the rain/snow line.

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Temperatures right now near South Portland, Maine

This is the latest surface temperatures as depicted by the HRRR computer model, updated hourly. Although these are not actual observations, this model is a very good representation of current conditions as it factors in observations, terrain and physics to give you more detailed temperatures in areas that do not have reporting weather stations. For the latest reports at specific locations, like in South Portland, ME please see our current conditions data on the left and right side of this page, or go to our current conditions page.

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Surface wind speed map over South Portland, ME

This map shows the latest HRRR computer model winds. This depiction of the current wind directions and speeds is an estimate from the computer model. For actual observations in South Portland, ME, see the current conditions data on the left and right side of this page, or go to our current conditions page.

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Regional 24 hour rainfall expected near South Portland, Maine

This is a forecast of the amount of precipitation expected over the next 24 hours from the HRRR weather forecast model. This is only one forecast depiction, and you should check other models to get a better idea of what may happen. You can view this and other models in more detail on our main weather forecast maps page. There, you will also be able to look at forecasts beyond just 24 hours and look at forecasts out to as far as 16 days.

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Area snowfall accumulation expected around Cumberland County, Maine

This is snowfall forecast, with amounts anticipated in the next 24 hours. This guidance is from the HRRR weather model. For more model forecasts out to 16 days, visit our main weather forecast maps page.

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These are Convective Outlooks from the Storm Prediction Center. Click to see Days 1-3 broken down into Tornado, Wind and Hail threats, as well as days 5-8 outlooks.

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Atlantic Hurricane and Tropical Storm Tracking Map
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<p>Hurricane Tracking from F5Weather</a></div>

Our hurricane tracking map monitors for any current or forecast tropical disturbances in the Atlantic. (See our Pacific Hurricane Tracker) Various hurricane models will draw a 'spaghetti plot' in the Atlantic Basin when a disturbance is forecast or exists, showing the system's forecast track. Once a storm has developed, the National Hurricane Center will forecast their official track. This will show up on the map along with the storm's current intensity, track and name. We will also plot some of the storm's vitals and of course the spaghetti plots from the models along with the NHC forecast track will give you an idea of where it's heading, and its forecast intensity with time.

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To view the latest computer models, visit f5wx.com for access to the weather maps and guidance that meteorologists use to make their forecasts.
 
Get access to:
  • European ECMWF HRES
  • American GFS
  • Canadian GDPS GEM
  • German DWD ICON
  • British MetOffice's UKMET Unified Model
  • American NAM
  • American HRRR
  • American NBM - National Blend of Models
  • GEFS, GEPS, MOGREPS & European Ensembles
  • Probabilities & Averages
  • 3-Ensemble Mean & more!
View Skew-T soundings, textual data tables for your location, and of course maps! Weather forecast maps of the basics like temperature, wind, pressure, humidity, dew point, cloud cover, simulated radar, travel weather, rainfall and snow are available. More advanced users can also get use out of our severe weather & tornado threat maps, as well as upper air & shear graphics.
 
See the latest forecast data as the models update.
 
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Climate Summary
(made with AI, use with caution)
South Portland, Maine Climate Summary

General Climate

    •   South Portland, Maine experiences a humid continental climate, characterized by warm, humid summers and cold, snowy winters.
    •   The city is located in USDA Hardiness Zone 6a, with an average annual temperature of 46.7°F (8.2°C).
    •   South Portland receives an average of 46 inches (117 cm) of precipitation per year, which is fairly evenly distributed throughout the year.

Summer

    •   Summer temperatures in South Portland are warm and humid, with average highs in the mid-70s°F (low 20s°C) and average lows in the mid-50s°F (low 10s°C).
    •   The hottest month is July, with an average high of 81°F (27°C) and an average low of 63°F (17°C).
    •   South Portland experiences occasional heat waves, with temperatures reaching into the 90s°F (low 30s°C).

Winter

    •   Winter temperatures in South Portland are cold and snowy, with average highs in the mid-30s°F (low 0s°C) and average lows in the mid-20s°F (low -0s°C).
    •   The coldest month is January, with an average high of 32°F (0°C) and an average low of 18°F (-8°C).
    •   South Portland receives an average of 54 inches (137 cm) of snow per year, which typically falls between November and April.

Spring and Fall

    •   Spring and fall temperatures in South Portland are mild, with average highs in the 50s°F (low 10s°C) and average lows in the 30s°F (low 0s°C).
    •   The months of April and May are typically the rainiest, with an average of 4 inches (10 cm) of precipitation each.

Climate Change

    •   Like many other parts of the world, South Portland is experiencing the effects of climate change.
    •   The city has seen an increase in average temperatures, as well as more extreme weather events, such as heavy rainfall and heat waves.
    •   These changes are expected to continue in the future, and could have a significant impact on the city's environment and economy.

Facts & Historical Information
(made with AI, use with caution)
Natural History

    •   South Portland's coastline is home to several nesting sites for the endangered least tern.

    •   The city's Bug Light Park is a popular spot for birdwatching, with over 200 species observed.

    •   The former Fort Preble, now a historic site, was a key defense post during the Civil War and the site of the first naval radio station in the United States.

Science

    •   The University of Maine's Gulf of Maine Research Institute is located in South Portland, conducting research on marine ecosystems and climate change.

    •   The city is home to several biotechnology and pharmaceutical companies, including IDEXX Laboratories and Lonza.

    •   South Portland is the site of the Maine State Aquarium, which features local marine life and conservation exhibits.

Personalities

    •   Admiral Robert E. Peary, the first person to reach the North Pole, was born in South Portland.

    •   Harriet Beecher Stowe, author of \

Tourist Attractions
1.Portland Head Light:

An iconic lighthouse located on Cape Elizabeth, just a short drive from South Portland. It's the oldest lighthouse in Maine and offers stunning views of the coastline.

2.Maine Mall:

One of the largest shopping malls in New England, located just north of South Portland. It features over 150 stores, restaurants, and entertainment options.

3.Casco Bay Ferry:

Take a scenic ferry ride from South Portland to Portland's Old Port. The ferry offers breathtaking views of the islands and coastline, and provides easy access to the city's attractions and dining scene.

Nearby Cities:

Portland, ME
South Portland Gardens, MEScarborough, ME
Falmouth, MEFalmouth Foreside, ME
Westbrook, MEWest Scarborough, ME
Gorham, MECumberland Center, ME
Old Orchard Beach, MESouth Windham, ME
Yarmouth, MEBuxton, ME
Saco, MEBiddeford, ME
Freeport, MENorth Windham, ME
Boston, MA
South Boston, MALowell, MA
Cambridge, MAManchester, NH
Brockton, MAQuincy, MA
Lynn, MANewton, MA
Nashua, NHSomerville, MA
Lawrence, MA