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.

Fair

64°F

18°C

Humidity 81%
Wind Speed Calm
Barometer 29.96 in (1014.8 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 26 Aug 1:55 am EDT
Extended Forecast for

Portsmouth NH

  • Overnight

    Overnight: Clear, with a low around 60. West wind around 5 mph.

    Low: 60 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 80. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 80 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 61. South wind around 5 mph becoming calm in the evening.

    Low: 61 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 82. Light southwest wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 82 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers before 10pm, then a chance of showers after midnight. Mostly cloudy, with a low around 67. South wind around 5 mph. Chance of precipitation is 30%.

    Low: 67 °F

    Chance
    Showers

  • Friday

    Friday: A 40 percent chance of showers. Partly sunny, with a high near 82.

    High: 82 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 60. West wind around 5 mph.
Wednesday
Sunny, with a high near 80. Calm wind becoming southeast around 5 mph in the afternoon.
Wednesday Night
Increasing clouds, with a low around 61. South wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 82. Light southwest wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Thursday Night
A chance of showers before 10pm, then a chance of showers after midnight. Mostly cloudy, with a low around 67. South wind around 5 mph. Chance of precipitation is 30%.
Friday
A 40 percent chance of showers. Partly sunny, with a high near 82.
Friday Night
Partly cloudy, with a low around 60.
Saturday
Sunny, with a high near 78.
Saturday Night
Mostly clear, with a low around 58.
Sunday
Mostly sunny, with a high near 82.
Sunday Night
Partly cloudy, with a low around 65.
Monday
Mostly sunny, with a high near 84.
Monday Night
Partly cloudy, with a low around 64.
Tuesday
Mostly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth NH
 43.05°N 70.78°W (Elev. 49 ft)
Last Update:
2:26 am EDT Aug 26, 2026
Forecast Valid:
2am EDT Aug 26, 2026-6pm EDT Sep 1, 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