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

72°F

22°C

Humidity 64%
Wind Speed N 8 mph
Barometer 30.10 in (1019.5 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 21 Aug 9:55 am EDT
Extended Forecast for

Portsmouth NH

  • Today

    Today: Mostly sunny, with a high near 76. East wind around 10 mph.

    High: 76 °F

    Mostly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 59. Calm wind becoming northeast around 5 mph.

    Low: 59 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A 30 percent chance of showers, mainly after 11am. Mostly cloudy, with a high near 72. Northeast wind 5 to 10 mph. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 72 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly after midnight. Patchy fog after 9pm. Otherwise, cloudy, with a low around 61. Northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.

    Low: 61 °F

    Showers
    Likely and
    Patchy Fog

  • Sunday

    Sunday: A 50 percent chance of showers. Areas of fog before 8am. Otherwise, mostly cloudy, with a high near 77. Calm wind becoming east around 5 mph in the afternoon.

    High: 77 °F

    Chance
    Showers and
    Areas Fog

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 63.

    Low: 63 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 58.

    Low: 58 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 76. East wind around 10 mph.
Tonight
Increasing clouds, with a low around 59. Calm wind becoming northeast around 5 mph.
Saturday
A 30 percent chance of showers, mainly after 11am. Mostly cloudy, with a high near 72. Northeast wind 5 to 10 mph. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
Showers likely, mainly after midnight. Patchy fog after 9pm. Otherwise, cloudy, with a low around 61. Northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.
Sunday
A 50 percent chance of showers. Areas of fog before 8am. Otherwise, mostly cloudy, with a high near 77. Calm wind becoming east around 5 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 63.
Monday
Sunny, with a high near 82.
Monday Night
Clear, with a low around 58.
Tuesday
Sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 58.
Wednesday
Sunny, with a high near 82.
Wednesday Night
Partly cloudy, with a low around 61.
Thursday
A 30 percent chance of showers. Partly 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:
2:24 am EDT Aug 21, 2026
Forecast Valid:
10am EDT Aug 21, 2026-6pm EDT Aug 27, 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