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

76°F

24°C

Humidity 50%
Wind Speed W 7 mph
Barometer 29.77 in (1008.3 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 21 Jun 1:55 pm EDT
Extended Forecast for

Portsmouth NH

  • This Afternoon

    This Afternoon: A 50 percent chance of showers and thunderstorms, mainly before 5pm. Partly sunny, with a high near 76. West wind around 5 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Partly Cloudy

  • Monday

    Monday: A 30 percent chance of showers, mainly after 3pm. Increasing clouds, with a high near 76. Calm wind becoming south around 5 mph in the afternoon. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 76 °F

    Partly Sunny
    then Chance
    Showers

  • Monday Night

    Monday Night: Showers, mainly after 7pm. Low around 57. East wind around 5 mph. Chance of precipitation is 90%.

    Low: 57 °F

    Showers

  • Tuesday

    Tuesday: Showers likely, mainly before 8am. Mostly cloudy, with a high near 79. Northwest wind around 5 mph. Chance of precipitation is 60%.

    High: 79 °F

    Showers
    Likely then
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 50 percent chance of showers and thunderstorms, mainly before 5pm. Partly sunny, with a high near 76. West wind around 5 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Partly cloudy, with a low around 57. Calm wind.
Monday
A 30 percent chance of showers, mainly after 3pm. Increasing clouds, with a high near 76. Calm wind becoming south around 5 mph in the afternoon. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
Showers, mainly after 7pm. Low around 57. East wind around 5 mph. Chance of precipitation is 90%.
Tuesday
Showers likely, mainly before 8am. Mostly cloudy, with a high near 79. Northwest wind around 5 mph. Chance of precipitation is 60%.
Tuesday Night
Partly cloudy, with a low around 59.
Wednesday
Sunny, with a high near 83.
Wednesday Night
Mostly clear, with a low around 60.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
A 30 percent chance of showers after 2am. Partly cloudy, with a low around 60.
Friday
A 50 percent chance of showers. Partly sunny, with a high near 77.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 62.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 85.
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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:
6:39 am EDT Jun 21, 2026
Forecast Valid:
2pm EDT Jun 21, 2026-6pm EDT Jun 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