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

36°F

2°C

Humidity 54%
Wind Speed N 3 mph
Barometer 30.00 in (1016.2 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Last update 21 Mar 11:55 pm EDT
Extended Forecast for

Portsmouth NH

  • Overnight

    Overnight: Cloudy, with a low around 32. Calm wind.

    Low: 32 °F

    Cloudy

  • Sunday

    Sunday: Rain and snow, becoming all rain after noon. High near 40. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 40 °F

    Rain/Snow
    then Rain

  • Sunday Night

    Sunday Night: Rain likely before 3am, then snow likely. Cloudy, with a low around 29. North wind 5 to 10 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 29 °F

    Rain Likely
    then
    Rain/Snow
    Likely

  • Monday

    Monday: Snow likely, mainly before 8am. Cloudy, with a high near 38. North wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 38 °F

    Snow Likely

  • Monday Night

    Monday Night: A 40 percent chance of snow before 1am. Mostly cloudy, with a low around 25. Northwest wind around 5 mph.

    Low: 25 °F

    Chance Snow

  • Tuesday

    Tuesday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 27.

    Low: 27 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 46.

    High: 46 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Cloudy, with a low around 32. Calm wind.
Sunday
Rain and snow, becoming all rain after noon. High near 40. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Sunday Night
Rain likely before 3am, then snow likely. Cloudy, with a low around 29. North wind 5 to 10 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Monday
Snow likely, mainly before 8am. Cloudy, with a high near 38. North wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Monday Night
A 40 percent chance of snow before 1am. Mostly cloudy, with a low around 25. Northwest wind around 5 mph.
Tuesday
Mostly sunny, with a high near 41.
Tuesday Night
Partly cloudy, with a low around 27.
Wednesday
Partly sunny, with a high near 46.
Wednesday Night
Mostly cloudy, with a low around 27.
Thursday
A chance of rain after 9am, mixing with snow after 5pm. Mostly cloudy, with a high near 47. Chance of precipitation is 30%.
Thursday Night
Rain and snow likely. Mostly cloudy, with a low around 32. Chance of precipitation is 60%.
Friday
A chance of rain and snow. Partly sunny, with a high near 43. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 19.
Saturday
Sunny, with a high near 38.
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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:
8:49 pm EDT Mar 21, 2026
Forecast Valid:
12am EDT Mar 22, 2026-6pm EDT Mar 28, 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