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

71°F

22°C

Humidity 72%
Wind Speed SE 6 mph
Barometer 30.23 in (1023.9 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 16 Sep 6:55 pm EDT
Extended Forecast for

Portsmouth NH

  • Tonight

    Tonight: Partly cloudy, with a low around 60. South wind around 5 mph becoming calm in the evening.

    Low: 60 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 73. Calm wind becoming east around 5 mph in the afternoon.

    High: 73 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely. Mostly cloudy, with a low around 61. Calm wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Showers
    Likely

  • Friday

    Friday: Sunny, with a high near 75. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 75 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 48. North wind around 5 mph.

    Low: 48 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers likely, mainly after noon. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.

    High: 63 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A 50 percent chance of showers before 2am. Mostly cloudy, with a low around 50.

    Low: 50 °F

    Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 60. South wind around 5 mph becoming calm in the evening.
Thursday
Mostly cloudy, with a high near 73. Calm wind becoming east around 5 mph in the afternoon.
Thursday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 61. Calm wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Sunny, with a high near 75. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.
Friday Night
Mostly clear, with a low around 48. North wind around 5 mph.
Saturday
Mostly sunny, with a high near 65.
Saturday Night
Mostly cloudy, with a low around 50.
Sunday
Showers likely, mainly after noon. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.
Sunday Night
A 50 percent chance of showers before 2am. Mostly cloudy, with a low around 50.
Monday
Mostly sunny, with a high near 64.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 50.
Tuesday
A 30 percent chance of showers. Partly sunny, with a high near 63.
Tuesday Night
Partly cloudy, with a low around 50.
Wednesday
Mostly sunny, with a high near 64.
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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:
2:23 pm EDT Sep 16, 2026
Forecast Valid:
7pm EDT Sep 16, 2026-6pm EDT Sep 23, 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