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 and Breezy

36°F

2°C

Humidity 47%
Wind Speed NW 21 G 26 mph
Barometer 29.77 in (1008.4 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 12 Mar 9:55 pm EDT
Extended Forecast for

Portsmouth NH

  • Tonight

    Tonight: Isolated snow showers before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 26. Northwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 26 °F

    Isolated Snow
    Showers then
    Mostly Clear

  • Friday

    Friday: A chance of rain and snow after 5pm. Increasing clouds, with a high near 41. West wind 5 to 10 mph becoming south in the afternoon. Chance of precipitation is 30%.

    High: 41 °F

    Sunny then
    Chance
    Rain/Snow

  • Friday Night

    Friday Night: A chance of rain and snow before 7pm, then a chance of snow between 7pm and 11pm, then a chance of rain after 11pm. Mostly cloudy, with a low around 31. South wind around 10 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 31 °F

    Chance
    Rain/Snow
    then Chance
    Rain

  • Saturday

    Saturday: A 30 percent chance of rain before 9am. Mostly sunny, with a high near 45. West wind 10 to 15 mph, with gusts as high as 35 mph.

    High: 45 °F

    Chance Rain
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 24. West wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 24 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly cloudy, with a high near 41.

    High: 41 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A 40 percent chance of rain after 2am. Cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy
    then Chance
    Rain

  • Monday

    Monday: Rain. High near 56. Chance of precipitation is 100%.

    High: 56 °F

    Rain

  • Monday Night

    Monday Night: Rain. Low around 35. Chance of precipitation is 90%.

    Low: 35 °F

    Rain

Detailed Forecast

Tonight
Isolated snow showers before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 26. Northwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Friday
A chance of rain and snow after 5pm. Increasing clouds, with a high near 41. West wind 5 to 10 mph becoming south in the afternoon. Chance of precipitation is 30%.
Friday Night
A chance of rain and snow before 7pm, then a chance of snow between 7pm and 11pm, then a chance of rain after 11pm. Mostly cloudy, with a low around 31. South wind around 10 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A 30 percent chance of rain before 9am. Mostly sunny, with a high near 45. West wind 10 to 15 mph, with gusts as high as 35 mph.
Saturday Night
Mostly clear, with a low around 24. West wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday
Mostly cloudy, with a high near 41.
Sunday Night
A 40 percent chance of rain after 2am. Cloudy, with a low around 31.
Monday
Rain. High near 56. Chance of precipitation is 100%.
Monday Night
Rain. Low around 35. Chance of precipitation is 90%.
Tuesday
A 40 percent chance of rain before 11am. Partly sunny, with a high near 47.
Tuesday Night
Partly cloudy, with a low around 19.
Wednesday
Sunny, with a high near 35.
Wednesday Night
Partly cloudy, with a low around 20.
Thursday
Partly sunny, with a high near 39.
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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:
8:03 pm EDT Mar 12, 2026
Forecast Valid:
10pm EDT Mar 12, 2026-6pm EDT Mar 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation