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

44°F

7°C

Humidity 87%
Wind Speed Calm
Barometer 29.72 in (1006.7 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 21 Mar 1:55 am EDT
Extended Forecast for

Portsmouth NH

  • Overnight

    Overnight: A 20 percent chance of rain before 3am. Mostly cloudy, with a low around 36. Southwest wind around 5 mph.

    Low: 36 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: Mostly sunny, with a high near 49. Northwest wind 5 to 10 mph.

    High: 49 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of snow after 3am. Increasing clouds, with a low around 31. Northwest wind around 5 mph becoming calm.

    Low: 31 °F

    Partly Cloudy
    then Slight
    Chance Snow

  • Sunday

    Sunday: Snow likely before 10am, then rain and snow likely between 10am and 11am, then rain after 11am. High near 44. Southeast wind 5 to 10 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 44 °F

    Rain/Snow
    then Rain

  • Sunday Night

    Sunday Night: Rain likely before 11pm, then a chance of snow. Cloudy, with a low around 29. North wind around 5 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 29 °F

    Rain/Snow
    Likely then
    Chance Snow

  • Monday

    Monday: A 50 percent chance of snow. Mostly cloudy, with a high near 39.

    High: 39 °F

    Chance Snow

  • Monday Night

    Monday Night: A 30 percent chance of snow before 9pm. Mostly cloudy, with a low around 23.

    Low: 23 °F

    Chance Snow
    then Mostly
    Cloudy

  • 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

Detailed Forecast

Overnight
A 20 percent chance of rain before 3am. Mostly cloudy, with a low around 36. Southwest wind around 5 mph.
Saturday
Mostly sunny, with a high near 49. Northwest wind 5 to 10 mph.
Saturday Night
A 20 percent chance of snow after 3am. Increasing clouds, with a low around 31. Northwest wind around 5 mph becoming calm.
Sunday
Snow likely before 10am, then rain and snow likely between 10am and 11am, then rain after 11am. High near 44. Southeast wind 5 to 10 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Sunday Night
Rain likely before 11pm, then a chance of snow. Cloudy, with a low around 29. North wind around 5 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Monday
A 50 percent chance of snow. Mostly cloudy, with a high near 39.
Monday Night
A 30 percent chance of snow before 9pm. Mostly cloudy, with a low around 23.
Tuesday
Mostly sunny, with a high near 41.
Tuesday Night
Partly cloudy, with a low around 27.
Wednesday
A chance of snow between 7am and 11am, then a chance of rain after 11am. Mostly cloudy, with a high near 45. Chance of precipitation is 40%.
Wednesday Night
Mostly cloudy, with a low around 23.
Thursday
Mostly sunny, with a high near 44.
Thursday Night
Rain and snow likely. Mostly cloudy, with a low around 30. Chance of precipitation is 60%.
Friday
Rain and snow likely. Mostly cloudy, with a high near 46. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth NH
 43.05°N 70.78°W (Elev. 49 ft)
Last Update:
2:22 pm EDT Mar 20, 2026
Forecast Valid:
2am EDT Mar 21, 2026-6pm EDT Mar 27, 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