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.

Partly Cloudy

65°F

18°C

Humidity 86%
Wind Speed Calm
Barometer 29.87 in (1011.7 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 20 Aug 12:55 am EDT
Extended Forecast for

Portsmouth NH

  • Overnight

    Overnight: Partly cloudy, with a low around 64. West wind around 5 mph becoming calm.

    Low: 64 °F

    Partly Cloudy

  • Thursday

    Thursday: Increasing clouds, with a high near 83. West wind 5 to 10 mph becoming south in the afternoon.

    High: 83 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: A 30 percent chance of showers, mainly before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 60. Calm wind. New precipitation amounts of less than a tenth of an inch possible.

    Low: 60 °F

    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 79. Northeast wind around 5 mph becoming east in the afternoon.

    High: 79 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 50 percent chance of showers. Mostly cloudy, with a high near 76.

    High: 76 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 61.

    Low: 61 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers likely, mainly after 5pm. Mostly cloudy, with a high near 79. Chance of precipitation is 60%.

    High: 79 °F

    Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: A 40 percent chance of showers before 11pm. Mostly cloudy, with a low around 61.

    Low: 61 °F

    Chance
    Showers then
    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 64. West wind around 5 mph becoming calm.
Thursday
Increasing clouds, with a high near 83. West wind 5 to 10 mph becoming south in the afternoon.
Thursday Night
A 30 percent chance of showers, mainly before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 60. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Friday
Mostly sunny, with a high near 79. Northeast wind around 5 mph becoming east in the afternoon.
Friday Night
Mostly cloudy, with a low around 59. Calm wind.
Saturday
A 50 percent chance of showers. Mostly cloudy, with a high near 76.
Saturday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 61.
Sunday
Showers likely, mainly after 5pm. Mostly cloudy, with a high near 79. Chance of precipitation is 60%.
Sunday Night
A 40 percent chance of showers before 11pm. Mostly cloudy, with a low around 61.
Monday
Sunny, with a high near 82.
Monday Night
Mostly clear, with a low around 57.
Tuesday
Sunny, with a high near 81.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
Mostly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth NH
 43.06°N 70.81°W (Elev. 56 ft)
Last Update:
11:24 pm EDT Aug 19, 2026
Forecast Valid:
1am EDT Aug 20, 2026-6pm EDT Aug 26, 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