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

69°F

21°C

Humidity 90%
Wind Speed SE 3 mph
Barometer 29.84 in (1010.7 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 17 Aug 9:55 pm EDT
Extended Forecast for

Portsmouth NH

  • Tonight

    Tonight: Areas of fog. Otherwise, mostly cloudy, with a low around 64. Southeast wind around 5 mph becoming calm.

    Low: 64 °F

    Areas Fog

  • Tuesday

    Tuesday: A 20 percent chance of showers between 1pm and 2pm. Areas of fog before 10am. Otherwise, partly sunny, with a high near 78. Northeast wind 5 to 10 mph becoming east in the afternoon.

    High: 78 °F

    Slight Chance
    Showers and
    Areas Fog

  • Tuesday Night

    Tuesday Night: Areas of fog after 2am. Otherwise, mostly cloudy, with a low around 63. Calm wind.

    Low: 63 °F

    Mostly Cloudy
    then Areas
    Fog

  • Wednesday

    Wednesday: Areas of fog before 8am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 83. Calm wind becoming south around 5 mph in the afternoon.

    High: 83 °F

    Areas Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 65. Southwest wind around 5 mph becoming calm.

    Low: 65 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

Detailed Forecast

Tonight
Areas of fog. Otherwise, mostly cloudy, with a low around 64. Southeast wind around 5 mph becoming calm.
Tuesday
A 20 percent chance of showers between 1pm and 2pm. Areas of fog before 10am. Otherwise, partly sunny, with a high near 78. Northeast wind 5 to 10 mph becoming east in the afternoon.
Tuesday Night
Areas of fog after 2am. Otherwise, mostly cloudy, with a low around 63. Calm wind.
Wednesday
Areas of fog before 8am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 83. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 65. Southwest wind around 5 mph becoming calm.
Thursday
Mostly sunny, with a high near 82.
Thursday Night
Partly cloudy, with a low around 61.
Friday
Mostly sunny, with a high near 79.
Friday Night
Partly cloudy, with a low around 61.
Saturday
A chance of showers between 11am and 3pm. Partly sunny, with a high near 77. Chance of precipitation is 30%.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 62.
Sunday
A 50 percent chance of showers. Partly sunny, with a high near 78.
Sunday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 63.
Monday
Mostly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth NH
 43.05°N 70.75°W (Elev. 13 ft)
Last Update:
10:30 pm EDT Aug 17, 2026
Forecast Valid:
11pm EDT Aug 17, 2026-6pm EDT Aug 24, 2026
 
Forecast Discussion
 
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Additional Resources

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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