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.

Mostly Cloudy

45°F

7°C

Humidity 88%
Wind Speed Calm
Barometer 30.05 in (1017.9 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 19 Oct 12:55 am EDT
Extended Forecast for

Portsmouth NH

  • Overnight

    Overnight: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 42. Calm wind.

    Low: 42 °F

    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 68. Light and variable wind becoming southeast 10 to 15 mph in the morning. Winds could gust as high as 20 mph.

    High: 68 °F

    Patchy Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Isolated showers before 2am, then isolated showers after 3am. Areas of fog after 5am. Otherwise, increasing clouds, with a low around 52. South wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 52 °F

    Partly Cloudy
    then Isolated
    Showers and
    Areas Fog

  • Monday

    Monday: Scattered showers before 9am, then rain, mainly after 9am. Areas of fog before 7am. High near 65. Southeast wind 10 to 15 mph, with gusts as high as 35 mph. Chance of precipitation is 90%.

    High: 65 °F

    Rain and
    Areas Fog

  • Monday Night

    Monday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 47. South wind around 5 mph becoming southwest after midnight. Chance of precipitation is 70%.

    Low: 47 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A 30 percent chance of showers before 10am. Mostly sunny, with a high near 65.

    High: 65 °F

    Chance
    Showers then
    Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers after 3am. Partly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Clear
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers, mainly after 8am. High near 65. Chance of precipitation is 80%.

    High: 65 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely, mainly before 8pm. Partly cloudy, with a low around 42. Chance of precipitation is 60%.

    Low: 42 °F

    Showers
    Likely then
    Partly Cloudy

Detailed Forecast

Overnight
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 42. Calm wind.
Sunday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 68. Light and variable wind becoming southeast 10 to 15 mph in the morning. Winds could gust as high as 20 mph.
Sunday Night
Isolated showers before 2am, then isolated showers after 3am. Areas of fog after 5am. Otherwise, increasing clouds, with a low around 52. South wind 5 to 10 mph. Chance of precipitation is 20%.
Monday
Scattered showers before 9am, then rain, mainly after 9am. Areas of fog before 7am. High near 65. Southeast wind 10 to 15 mph, with gusts as high as 35 mph. Chance of precipitation is 90%.
Monday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 47. South wind around 5 mph becoming southwest after midnight. Chance of precipitation is 70%.
Tuesday
A 30 percent chance of showers before 10am. Mostly sunny, with a high near 65.
Tuesday Night
A 30 percent chance of showers after 3am. Partly cloudy, with a low around 47.
Wednesday
Showers, mainly after 8am. High near 65. Chance of precipitation is 80%.
Wednesday Night
Showers likely, mainly before 8pm. Partly cloudy, with a low around 42. Chance of precipitation is 60%.
Thursday
Mostly sunny, with a high near 61.
Thursday Night
Mostly clear, with a low around 40.
Friday
Mostly sunny, with a high near 60.
Friday Night
Mostly clear, with a low around 39.
Saturday
Mostly sunny, with a high near 59.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth NH
 43.07°N 70.78°W (Elev. 33 ft)
Last Update:
10:30 pm EDT Oct 18, 2025
Forecast Valid:
1am EDT Oct 19, 2025-6pm EDT Oct 25, 2025
 
Forecast Discussion
 
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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