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

32°F

0°C

Humidity 63%
Wind Speed NW 14 mph
Barometer 30.34 in (1027.8 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 15 Mar 4:55 am EDT
Extended Forecast for

Portsmouth NH

  • Today

    Today: Partly sunny, with a high near 38. West wind 5 to 10 mph becoming southeast in the morning. Winds could gust as high as 20 mph.

    High: 38 °F

    Partly Sunny

  • Tonight

    Tonight: A 30 percent chance of rain, mainly after 5am. Increasing clouds, with a low around 34. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 34 °F

    Mostly Cloudy
    then Chance
    Rain

  • Monday

    Monday: Rain, with thunderstorms also possible after 2pm. High near 55. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 55 °F

    Rain

  • Monday Night

    Monday Night: Rain. Low around 39. Breezy, with a south wind 15 to 20 mph, with gusts as high as 40 mph. Chance of precipitation is 100%.

    Low: 39 °F

    Rain and
    Breezy

  • Tuesday

    Tuesday: A 30 percent chance of showers before 8am. Mostly sunny, with a high near 46. West wind around 15 mph, with gusts as high as 30 mph.

    High: 46 °F

    Chance
    Showers then
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 18.

    Low: 18 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 37.

    High: 37 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 38. West wind 5 to 10 mph becoming southeast in the morning. Winds could gust as high as 20 mph.
Tonight
A 30 percent chance of rain, mainly after 5am. Increasing clouds, with a low around 34. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Rain, with thunderstorms also possible after 2pm. High near 55. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Monday Night
Rain. Low around 39. Breezy, with a south wind 15 to 20 mph, with gusts as high as 40 mph. Chance of precipitation is 100%.
Tuesday
A 30 percent chance of showers before 8am. Mostly sunny, with a high near 46. West wind around 15 mph, with gusts as high as 30 mph.
Tuesday Night
Mostly clear, with a low around 18.
Wednesday
Sunny, with a high near 37.
Wednesday Night
Mostly cloudy, with a low around 24.
Thursday
Partly sunny, with a high near 43.
Thursday Night
Mostly cloudy, with a low around 27.
Friday
Mostly sunny, with a high near 47.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 29.
Saturday
A 50 percent chance of rain. Mostly cloudy, with a high near 45.
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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:
3:09 am EDT Mar 15, 2026
Forecast Valid:
5am EDT Mar 15, 2026-6pm EDT Mar 21, 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