South Portland, ME 04116 Weather

Cumberland County3:41 PM EDT43.64°N, 70.24°W

Current conditions

Clear
64°
Clear
Feels like 64°
High 65°·Low 38°
WindS 6 mph
Humidity39%
Dew point39°
Pressure30.01 inHg
Visibility10 mi
Cloud cover12%
UV index1 Low
Sunrise7:09 AM
Sunset5:42 PM

Observed at Portland, Portland International Jetport · 41 min ago

Forecast

10-day

  • Monday

    Sunny, with a high near 65. Southwest wind 0 to 5 mph.

  • Monday Night

    Mostly clear, with a low around 38. North wind 0 to 10 mph.

  • Tuesday

    Sunny, with a high near 52. Northwest wind 5 to 10 mph.

National Weather Service forecast updated 13 hrs ago.

Hourly

Hourly forecast
  1. Now Sunny 64°
  2. 4 PM Sunny 62°
  3. 5 PM Mostly Sunny 61°
  4. 6 PM Partly Cloudy 59°
  5. 7 PM Partly Cloudy 57°
  6. 8 PM Partly Cloudy 55°
  7. 9 PM Partly Cloudy 53°
  8. 10 PM Partly Cloudy 51°
  9. 11 PM Partly Cloudy 51°
  10. Tue12 AM Partly Cloudy 51°
  11. 1 AM Mostly Clear 49°
  12. 2 AM Clear 47°
  13. 3 AM Clear 45°
  14. 4 AM Clear 43°
  15. 5 AM Clear 41°
  16. 6 AM Sunny 40°
  17. 7 AM Sunny 38°
  18. 8 AM Sunny 38°
  19. 9 AM Sunny 40°
  20. 10 AM Sunny 42°
  21. 11 AM Sunny 44°
  22. 12 PM Sunny 47°
  23. 1 PM Sunny 49°
  24. 2 PM Sunny 49°

10-day forecast

Details
  1. TonightOct 25 Mostly Clear Mostly Clear37°
  2. TodayOct 26 Sunny Sunny38°65°
  3. TueOct 27 Sunny Sunny35°52°
  4. WedOct 28 Sunny Sunny39°53°
  5. ThuOct 29 Mostly Sunny Mostly Sunny49°64°
  6. FriOct 30 Sunny Sunny44°68°
  7. SatOct 31 Sunny Sunny42°58°
  8. SunNov 1 Mostly Sunny Mostly Sunny58°
  9. MonNov 2 Cloudy Cloudy48°60°
  10. TueNov 3 Cloudy Cloudy0.05 in36°54°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

Full map
Open the National Weather Service radar (the map here needs JavaScript).

Weather news in Maine

More weather news
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Air quality

36
Good
Fine particles (PM2.5)

Air quality is satisfactory, and air pollution poses little or no risk.

Forecast

  • MonGood
  • TueGood
  • WedGood

Southwest Coast, ME reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:09 AM
Sunset 5:42 PM
Daylight 10 h 32 min (−2 min 45 s tomorrow)
Full Moon · 99% lit
Moonrise 5:29 PM Moonset 7:45 AM
Full moon Nov 24 New moon Nov 9

Almanac

Monthly
Normal high / low56° / 38°
Record high79° (1963)
Record low18° (1952)
Wettest1.88 in (2008)
Month to date1.66 in (normal 4.27 in)

Portland Area, records since 1874. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in GYX, issued 1 hr ago

What Has Changed

No significant changes to the forecast with this update.

Key Messages

1. High pressure will dominate the weather for the next week. Expect dry conditions and no significant weather impacts.

Discussion

KEY MESSAGE 1 DESCRIPTION...

High pressure remains the dominating force behind our local weather for the foreseeable future. That will bring largely fair weather, dry conditions, and on average warmer than normal temps.

It is fall however, and those temps will experience some dips here and there. One of those dips will be following the passage of a mostly dry cold front tonight. Temps will struggle to creep out of the 40s for even southern parts of the forecast area, and remain in the mid 40s north of the mtns. There should be enough dry advection and gradient wind to prevent significant radiation fog tonight.

Then we just recycle the forecast pattern. High pressure will build into the region. This provides us with perhaps the coldest night of the season so far Tue night. I did continue to blend in some MOS guidance in order to bring the cold spots down into the teens and lower 20s, but otherwise the NBM bias corrected guidance is pretty locked onto the radiational cooling pattern.

That high pressure will move off the coast and allow return flow to develop late in the week. This will bring warmer than normal temps back into the forecast area and give us a couple more chances as some readings near 70 across southern NH and coastal western Maine.

Another largely dry frontal passage is expected heading into Sat, but that just returns temps to near normal. So trick or treating conditions will be classically crisp.

Aviation

Through Tuesday: VFR conditions anticipated. There should be enough breeze behind the cold front and dry advection to prevent valley fog from forming.

Outlook...

Wednesday-Thursday...VFR conditions expected. There may be brief period of IFR or lower in valley fog at LEB, CON, and MHT prior to sunrise.

Friday: Another front approaches the region and some MVFR CIGs may be possible north of the mtns, including HIE.

Saturday: VFR conditions expected.

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use. How to use Weather