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

63°F

17°C

Humidity 77%
Wind Speed Calm
Barometer 30.08 in (1018.8 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 17 May 11:55 pm EDT
Extended Forecast for

Portsmouth NH

  • Overnight

    Overnight: Partly cloudy, with a low around 55. Northwest wind around 5 mph becoming calm.

    Low: 55 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 66. East wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 66 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 54. Southeast wind around 5 mph becoming calm.

    Low: 54 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 91. Southwest wind 5 to 10 mph.

    High: 91 °F

    Hot

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 66. Southwest wind around 5 mph.

    Low: 66 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 51.

    Low: 51 °F

    Chance
    Showers then
    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 55. Northwest wind around 5 mph becoming calm.
Monday
Mostly sunny, with a high near 66. East wind 5 to 10 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 54. Southeast wind around 5 mph becoming calm.
Tuesday
Mostly sunny and hot, with a high near 91. Southwest wind 5 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 66. Southwest wind around 5 mph.
Wednesday
A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 87.
Wednesday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 51.
Thursday
Mostly sunny, with a high near 65.
Thursday Night
Mostly clear, with a low around 46.
Friday
Mostly sunny, with a high near 62.
Friday Night
Mostly cloudy, with a low around 46.
Saturday
A 30 percent chance of showers. Mostly cloudy, with a high near 62.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 47.
Sunday
A 40 percent chance of showers. Mostly cloudy, with a high near 62.
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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:
7:18 pm EDT May 17, 2026
Forecast Valid:
12am EDT May 18, 2026-6pm EDT May 24, 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