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

73°F

23°C

Humidity 91%
Wind Speed Calm
Barometer 30.00 in (1016.1 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 15 Jul 2:55 am EDT
Extended Forecast for

Portsmouth NH

  • Overnight

    Overnight: A 20 percent chance of showers. Patchy fog. Otherwise, cloudy, with a low around 70. Southwest wind around 5 mph.

    Low: 70 °F

    Slight Chance
    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 86. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 86 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after midnight. Otherwise, mostly clear, with a low around 68. South wind around 5 mph becoming calm.

    Low: 68 °F

    Mostly Clear
    then Patchy
    Fog

  • Wednesday

    Wednesday: Mostly sunny, with a high near 89. Calm wind becoming south around 5 mph in the afternoon.

    High: 89 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 71. Southwest wind around 5 mph.

    Low: 71 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: A chance of showers between 8am and 11am, then a chance of showers and thunderstorms after 11am. Patchy fog before 7am. Otherwise, partly sunny, with a high near 87. Chance of precipitation is 50%.

    High: 87 °F

    Chance
    Showers and
    Patchy Fog
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: Scattered thunderstorms before 8pm. Partly cloudy, with a low around 72. Chance of precipitation is 30%.

    Low: 72 °F

    Scattered
    T-storms then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of showers. Patchy fog. Otherwise, cloudy, with a low around 70. Southwest wind around 5 mph.
Tuesday
Patchy fog before 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 86. Calm wind becoming southeast around 5 mph in the afternoon.
Tuesday Night
Patchy fog after midnight. Otherwise, mostly clear, with a low around 68. South wind around 5 mph becoming calm.
Wednesday
Mostly sunny, with a high near 89. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 71. Southwest wind around 5 mph.
Thursday
A chance of showers between 8am and 11am, then a chance of showers and thunderstorms after 11am. Patchy fog before 7am. Otherwise, partly sunny, with a high near 87. Chance of precipitation is 50%.
Thursday Night
Scattered thunderstorms before 8pm. Partly cloudy, with a low around 72. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 85.
Friday Night
Partly cloudy, with a low around 63.
Saturday
Mostly sunny, with a high near 80.
Saturday Night
Partly cloudy, with a low around 63.
Sunday
A 40 percent chance of showers. Partly sunny, with a high near 81.
Sunday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 64.
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 70.78°W (Elev. 49 ft)
Last Update:
1:30 am EDT Jul 15, 2025
Forecast Valid:
3am EDT Jul 15, 2025-6pm EDT Jul 21, 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