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

43°F

6°C

Humidity 47%
Wind Speed W 6 mph
Barometer 29.78 in (1008.8 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 18 Feb 12:55 pm EST
Extended Forecast for

Portsmouth NH

  • This Afternoon

    This Afternoon: A 30 percent chance of snow, mainly before 2pm. Mostly cloudy, with a high near 39. Northwest wind around 5 mph becoming calm.

    High: 39 °F

    Chance Snow

  • Tonight

    Tonight: A 30 percent chance of snow between 9pm and midnight. Mostly cloudy, with a low around 21. Calm wind becoming north around 5 mph.

    Low: 21 °F

    Chance Snow
    then Mostly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 38. Calm wind.

    High: 38 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 22. Calm wind.

    Low: 22 °F

    Partly Cloudy

  • Friday

    Friday: Snow likely, mainly after 4pm. Mostly cloudy, with a high near 37. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 37 °F

    Chance Snow
    then Snow
    Likely

  • Friday Night

    Friday Night: Snow. Low around 24. Chance of precipitation is 90%.

    Low: 24 °F

    Snow

  • Saturday

    Saturday: A 40 percent chance of snow between 1pm and 2pm. Mostly cloudy, with a high near 33.

    High: 33 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A chance of snow between 9pm and midnight. Mostly cloudy, with a low around 18. Chance of precipitation is 30%.

    Low: 18 °F

    Chance Snow
    then Mostly
    Cloudy

  • Sunday

    Sunday: A 30 percent chance of snow after 2pm. Mostly cloudy, with a high near 35.

    High: 35 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

This Afternoon
A 30 percent chance of snow, mainly before 2pm. Mostly cloudy, with a high near 39. Northwest wind around 5 mph becoming calm.
Tonight
A 30 percent chance of snow between 9pm and midnight. Mostly cloudy, with a low around 21. Calm wind becoming north around 5 mph.
Thursday
Mostly sunny, with a high near 38. Calm wind.
Thursday Night
Partly cloudy, with a low around 22. Calm wind.
Friday
Snow likely, mainly after 4pm. Mostly cloudy, with a high near 37. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Friday Night
Snow. Low around 24. Chance of precipitation is 90%.
Saturday
A 40 percent chance of snow between 1pm and 2pm. Mostly cloudy, with a high near 33.
Saturday Night
A chance of snow between 9pm and midnight. Mostly cloudy, with a low around 18. Chance of precipitation is 30%.
Sunday
A 30 percent chance of snow after 2pm. Mostly cloudy, with a high near 35.
Sunday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 23.
Monday
A 40 percent chance of snow. Mostly cloudy, with a high near 34.
Monday Night
Mostly cloudy, with a low around 17.
Tuesday
Mostly sunny, with a high near 29.
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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:
6:08 am EST Feb 18, 2026
Forecast Valid:
1pm EST Feb 18, 2026-6pm EST Feb 24, 2026
 
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