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.

Mostly Cloudy

47°F

8°C

Humidity 71%
Wind Speed NE 12 mph
Barometer 30.00 in (1016.1 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 11 Mar 2:55 am EDT
Extended Forecast for

Portsmouth NH

  • Overnight

    Overnight: Mostly cloudy, with a low around 39. Northeast wind around 5 mph.

    Low: 39 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of rain before 7am, then a chance of rain after 8am. Patchy fog before 2pm, then patchy fog after 3pm. Otherwise, mostly cloudy, with a high near 41. Northeast wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 41 °F

    Chance Rain
    and Patchy
    Fog

  • Wednesday Night

    Wednesday Night: A chance of rain, with thunderstorms also possible after 11pm. Areas of fog. Otherwise, cloudy, with a temperature rising to around 50 by 5am. Southeast wind 5 to 10 mph becoming southwest after midnight. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 41 °F⇑

    Chance Rain
    and Areas Fog

  • Thursday

    Thursday: A 40 percent chance of rain. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 50. West wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 50 °F

    Chance Rain
    and Patchy
    Fog

  • Thursday Night

    Thursday Night: A 30 percent chance of snow before 7pm. Partly cloudy, with a low around 24. West wind 5 to 10 mph.

    Low: 24 °F

    Chance Snow
    then Mostly
    Clear

  • Friday

    Friday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of rain before 8pm, then a chance of rain and snow between 8pm and 9pm, then a chance of rain after 9pm. Mostly cloudy, with a low around 31. Chance of precipitation is 50%.

    Low: 31 °F

    Chance
    Rain/Snow
    then Chance
    Rain

  • Saturday

    Saturday: Partly sunny, with a high near 45.

    High: 45 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 39. Northeast wind around 5 mph.
Wednesday
A slight chance of rain before 7am, then a chance of rain after 8am. Patchy fog before 2pm, then patchy fog after 3pm. Otherwise, mostly cloudy, with a high near 41. Northeast wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A chance of rain, with thunderstorms also possible after 11pm. Areas of fog. Otherwise, cloudy, with a temperature rising to around 50 by 5am. Southeast wind 5 to 10 mph becoming southwest after midnight. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A 40 percent chance of rain. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 50. West wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday Night
A 30 percent chance of snow before 7pm. Partly cloudy, with a low around 24. West wind 5 to 10 mph.
Friday
Mostly sunny, with a high near 43.
Friday Night
A chance of rain before 8pm, then a chance of rain and snow between 8pm and 9pm, then a chance of rain after 9pm. Mostly cloudy, with a low around 31. Chance of precipitation is 50%.
Saturday
Partly sunny, with a high near 45.
Saturday Night
Partly cloudy, with a low around 24.
Sunday
Mostly cloudy, with a high near 42.
Sunday Night
Rain and snow likely. Cloudy, with a low around 31. Chance of precipitation is 60%.
Monday
Rain. High near 55. Chance of precipitation is 90%.
Monday Night
Rain likely. Mostly cloudy, with a low around 27. Chance of precipitation is 60%.
Tuesday
Sunny, with a high near 39.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth NH
 43.03°N 70.79°W (Elev. 59 ft)
Last Update:
2:28 am EDT Mar 11, 2026
Forecast Valid:
3am EDT Mar 11, 2026-6pm EDT Mar 17, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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