National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Pease Air Force Base / Portsmouth (KPSM)

Lat: 43.08°NLon: 70.82°WElev: 102ft.

Overcast

23°F

-5°C

Humidity 30%
Wind Speed S 3 mph
Barometer 30.06 in (1018.4 mb)
Dewpoint -4°F (-20°C)
Visibility 10.00 mi
Last update 9 Dec 3:55 pm EST
Extended Forecast for

Portsmouth NH

  • Tonight

    Tonight: A 40 percent chance of snow, mainly before 2am. Mostly cloudy, with a low around 19. Southwest wind around 5 mph.

    Low: 19 °F

    Chance Snow

  • Wednesday

    Wednesday: A chance of rain and snow before noon, then rain. High near 40. South wind 5 to 10 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 40 °F

    Chance
    Rain/Snow
    then Rain

  • Wednesday Night

    Wednesday Night: Rain likely, mainly before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 29. Southwest wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 29 °F

    Rain Likely
    then Chance
    Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 36. West wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 36 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 18. West wind around 10 mph, with gusts as high as 20 mph.

    Low: 18 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 33.

    High: 33 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 37.

    High: 37 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 40 percent chance of snow, mainly before 2am. Mostly cloudy, with a low around 19. Southwest wind around 5 mph.
Wednesday
A chance of rain and snow before noon, then rain. High near 40. South wind 5 to 10 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Wednesday Night
Rain likely, mainly before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 29. Southwest wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Mostly sunny, with a high near 36. West wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday Night
Partly cloudy, with a low around 18. West wind around 10 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 33.
Friday Night
Partly cloudy, with a low around 19.
Saturday
Partly sunny, with a high near 37.
Saturday Night
Mostly cloudy, with a low around 23.
Sunday
A 40 percent chance of snow. Partly sunny, with a high near 33.
Sunday Night
Partly cloudy, with a low around 11.
Monday
Sunny, with a high near 24.
Monday Night
Mostly cloudy, with a low around 12.
Tuesday
Mostly sunny, with a high near 30.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth NH
 43.07°N 70.78°W (Elev. 33 ft)
Last Update:
1:16 pm EST Dec 9, 2025
Forecast Valid:
4pm EST Dec 9, 2025-6pm EST Dec 16, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation