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

58°F

14°C

Humidity 81%
Wind Speed Calm
Barometer 29.99 in (1015.8 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 26 Jul 12:55 am EDT
Extended Forecast for

Portsmouth NH

  • Overnight

    Overnight: Areas of fog after 5am. Otherwise, mostly cloudy, with a low around 55. Calm wind.

    Low: 55 °F

    Areas Fog

  • Sunday

    Sunday: Mostly sunny, with a high near 75. Light and variable wind becoming east 5 to 10 mph in the morning.

    High: 75 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 54. Calm wind.

    Low: 54 °F

    Partly Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 76. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 76 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 58. Calm wind.

    Low: 58 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers after 2pm. Partly sunny, with a high near 78.

    High: 78 °F

    Partly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers likely, with thunderstorms also possible after 2am. Mostly cloudy, with a low around 61. Chance of precipitation is 70%.

    Low: 61 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before 8am, then showers likely between 8am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 74. Chance of precipitation is 70%.

    High: 74 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.

    Low: 60 °F

    Showers
    Likely

Detailed Forecast

Overnight
Areas of fog after 5am. Otherwise, mostly cloudy, with a low around 55. Calm wind.
Sunday
Mostly sunny, with a high near 75. Light and variable wind becoming east 5 to 10 mph in the morning.
Sunday Night
Partly cloudy, with a low around 54. Calm wind.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 76. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 58. Calm wind.
Tuesday
A 30 percent chance of showers after 2pm. Partly sunny, with a high near 78.
Tuesday Night
Showers likely, with thunderstorms also possible after 2am. Mostly cloudy, with a low around 61. Chance of precipitation is 70%.
Wednesday
Showers likely and possibly a thunderstorm before 8am, then showers likely between 8am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 74. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.
Thursday
A 50 percent chance of showers. Partly sunny, with a high near 78.
Thursday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 62.
Friday
Mostly sunny, with a high near 81.
Friday Night
Partly cloudy, with a low around 63.
Saturday
Mostly sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth NH
 43.07°N 70.78°W (Elev. 33 ft)
Last Update:
10:15 pm EDT Jul 25, 2026
Forecast Valid:
1am EDT Jul 26, 2026-6pm EDT Aug 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