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

Hazardous Weather Conditions

Current conditions at

Pease Air Force Base / Portsmouth (KPSM)

Lat: 43.08°NLon: 70.82°WElev: 102ft.

Mostly Cloudy

21°F

-6°C

Humidity 90%
Wind Speed Calm
Barometer 30.00 in (1016.3 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Last update 20 Feb 5:55 am EST
Extended Forecast for

Portsmouth NH

Winter Weather Advisory February 20, 12:00pm until February 21, 07:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Today

    Today: 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%. Total daytime snow accumulation of around an inch possible.

    High: 37 °F

    Mostly Cloudy
    then Snow
    Likely

  • Tonight

    Tonight: Snow, mainly before 5am. Low around 21. East wind around 5 mph becoming north after midnight. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.

    Low: 21 °F

    Snow

  • Saturday

    Saturday: A 40 percent chance of snow, mainly before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 32. North wind around 5 mph.

    High: 32 °F

    Chance Snow

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 19. Calm wind becoming north around 5 mph after midnight.

    Low: 19 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 35. Northeast wind 5 to 10 mph.

    High: 35 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 40 percent chance of snow after 1am. Cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy
    then Chance
    Snow

  • Monday

    Monday: A 30 percent chance of snow before 2pm. Cloudy, with a high near 32.

    High: 32 °F

    Chance Snow

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 19.

    Low: 19 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 35.

    High: 35 °F

    Mostly Sunny

Detailed Forecast

Today
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%. Total daytime snow accumulation of around an inch possible.
Tonight
Snow, mainly before 5am. Low around 21. East wind around 5 mph becoming north after midnight. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.
Saturday
A 40 percent chance of snow, mainly before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 32. North wind around 5 mph.
Saturday Night
Partly cloudy, with a low around 19. Calm wind becoming north around 5 mph after midnight.
Sunday
Partly sunny, with a high near 35. Northeast wind 5 to 10 mph.
Sunday Night
A 40 percent chance of snow after 1am. Cloudy, with a low around 24.
Monday
A 30 percent chance of snow before 2pm. Cloudy, with a high near 32.
Monday Night
Mostly cloudy, with a low around 19.
Tuesday
Mostly sunny, with a high near 35.
Tuesday Night
Partly cloudy, with a low around 13.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 37. Chance of precipitation is 30%.
Wednesday Night
Rain and snow likely. Mostly cloudy, with a low around 28. Chance of precipitation is 60%.
Thursday
A 30 percent chance of rain. Mostly cloudy, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth NH
 43.05°N 70.78°W (Elev. 49 ft)
Last Update:
1:53 am EST Feb 20, 2026
Forecast Valid:
6am EST Feb 20, 2026-6pm EST Feb 26, 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