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.

A Few Clouds

67°F

19°C

Humidity 65%
Wind Speed SW 6 mph
Barometer 29.98 in (1015.5 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 3 Sep 8:55 am EDT
Extended Forecast for

Portsmouth NH

  • Today

    Today: Sunny, with a high near 77. Southeast wind around 5 mph.

    High: 77 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 55. South wind around 5 mph becoming calm in the evening.

    Low: 55 °F

    Partly Cloudy

  • Thursday

    Thursday: Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 76. Light south wind becoming southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 76 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after 3am. Partly cloudy, with a low around 60. South wind around 5 mph.

    Low: 60 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers before 10am. Mostly sunny, with a high near 81. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 81 °F

    Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of showers between noon and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 83. Chance of precipitation is 40%.

    High: 83 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 56. Chance of precipitation is 70%.

    Low: 56 °F

    Showers
    Likely

  • Sunday

    Sunday: A 40 percent chance of showers before 3pm. Partly sunny, with a high near 75.

    High: 75 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 77. Southeast wind around 5 mph.
Tonight
Partly cloudy, with a low around 55. South wind around 5 mph becoming calm in the evening.
Thursday
Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 76. Light south wind becoming southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Thursday Night
A 30 percent chance of showers after 3am. Partly cloudy, with a low around 60. South wind around 5 mph.
Friday
A 30 percent chance of showers before 10am. Mostly sunny, with a high near 81. South wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 64.
Saturday
A chance of showers between noon and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 83. Chance of precipitation is 40%.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 56. Chance of precipitation is 70%.
Sunday
A 40 percent chance of showers before 3pm. Partly sunny, with a high near 75.
Sunday Night
Partly cloudy, with a low around 51.
Monday
Sunny, with a high near 74.
Monday Night
Mostly clear, with a low around 50.
Tuesday
Sunny, with a high near 72.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth NH
 43.05°N 70.78°W (Elev. 49 ft)
Last Update:
6:16 am EDT Sep 3, 2025
Forecast Valid:
10am EDT Sep 3, 2025-6pm EDT Sep 9, 2025
 
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