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.

Thunderstorm Light Rain

68°F

20°C

Humidity 78%
Wind Speed W 6 mph
Barometer 29.80 in (1009.3 mb)
Dewpoint 61°F (16°C)
Visibility 7.00 mi
Last update 21 Jun 2:55 pm EDT
Extended Forecast for

Portsmouth NH

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms, mainly before 5pm. Partly sunny, with a high near 78. Northwest wind around 5 mph.

    High: 78 °F

    Chance
    T-storms

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Mostly Clear
    then Patchy
    Fog

  • Monday

    Monday: A 40 percent chance of showers after 2pm. Increasing clouds, with a high near 75. Calm wind becoming southeast around 5 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.

    High: 75 °F

    Mostly Sunny
    then Chance
    Showers

  • Monday Night

    Monday Night: Rain. Patchy fog after 4am. Low around 57. Southeast wind around 5 mph. Chance of precipitation is 90%.

    Low: 57 °F

    Rain and
    Patchy Fog

  • Tuesday

    Tuesday: Showers, mainly before 1pm. Patchy fog before 9am. High near 75. South wind around 5 mph becoming northwest in the morning. Chance of precipitation is 80%.

    High: 75 °F

    Showers and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers before 7pm. Patchy fog after midnight. Otherwise, mostly clear, with a low around 59.

    Low: 59 °F

    Chance
    Showers then
    Patchy Fog

  • Wednesday

    Wednesday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly before 5pm. Partly sunny, with a high near 78. Northwest wind around 5 mph.
Tonight
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 57. Calm wind.
Monday
A 40 percent chance of showers after 2pm. Increasing clouds, with a high near 75. Calm wind becoming southeast around 5 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Rain. Patchy fog after 4am. Low around 57. Southeast wind around 5 mph. Chance of precipitation is 90%.
Tuesday
Showers, mainly before 1pm. Patchy fog before 9am. High near 75. South wind around 5 mph becoming northwest in the morning. Chance of precipitation is 80%.
Tuesday Night
A 30 percent chance of showers before 7pm. Patchy fog after midnight. Otherwise, mostly clear, with a low around 59.
Wednesday
Sunny, with a high near 84.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Sunny, with a high near 81.
Thursday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 61.
Friday
Showers likely. Mostly cloudy, with a high near 80. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 61.
Saturday
A 30 percent chance of showers. Mostly sunny, with a high near 85.
Saturday Night
A 30 percent chance of showers. Partly cloudy, with a low around 61.
Sunday
Mostly sunny, with a high near 84.
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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:
2:32 pm EDT Jun 21, 2026
Forecast Valid:
3pm EDT Jun 21, 2026-6pm EDT Jun 28, 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