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.

Fog/Mist

69°F

21°C

Humidity 92%
Wind Speed NE 3 mph
Barometer 29.82 in (1010.0 mb)
Dewpoint 66°F (19°C)
Visibility 4.00 mi
Last update 18 Aug 5:55 am EDT
Extended Forecast for

Portsmouth NHSimilar City Names

  • Today

    Today: A 20 percent chance of showers after 2pm. Patchy fog before 7am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 78. Calm wind becoming east around 5 mph in the afternoon.

    High: 78 °F

    Patchy Fog
    then Slight
    Chance
    Showers

  • Tonight

    Tonight: Patchy fog after 9pm. Otherwise, mostly cloudy, with a low around 63. Calm wind.

    Low: 63 °F

    Patchy Fog

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 84. Calm wind becoming south around 5 mph in the afternoon.

    High: 84 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 65. South wind around 5 mph becoming calm.

    Low: 65 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 82. Calm wind becoming east around 5 mph in the afternoon.

    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 80.

    High: 80 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Saturday

    Saturday: A 30 percent chance of showers after 2pm. Partly sunny, with a high near 77.

    High: 77 °F

    Partly Sunny
    then Chance
    Showers

Detailed Forecast

Today
A 20 percent chance of showers after 2pm. Patchy fog before 7am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 78. Calm wind becoming east around 5 mph in the afternoon.
Tonight
Patchy fog after 9pm. Otherwise, mostly cloudy, with a low around 63. Calm wind.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 84. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 65. South wind around 5 mph becoming calm.
Thursday
Mostly sunny, with a high near 82. Calm wind becoming east around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 61.
Friday
Mostly sunny, with a high near 80.
Friday Night
Partly cloudy, with a low around 60.
Saturday
A 30 percent chance of showers after 2pm. Partly sunny, with a high near 77.
Saturday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 61. Chance of precipitation is 60%.
Sunday
Showers likely. Mostly cloudy, with a high near 78. Chance of precipitation is 60%.
Sunday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 61.
Monday
A 30 percent chance of showers. Mostly sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth NHSimilar City Names
 43.05°N 70.78°W (Elev. 49 ft)
Last Update:
6:15 am EDT Aug 18, 2026
Forecast Valid:
6am EDT Aug 18, 2026-6pm EDT Aug 24, 2026
 
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Additional Resources

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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