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

65°F

18°C

Humidity 40%
Wind Speed NW 10 mph
Barometer 30.03 in (1017.1 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 21 May 3:55 am EDT
Extended Forecast for

Portsmouth NH

  • Today

    Today: Mostly cloudy, with a high near 65. North wind around 5 mph becoming calm.

    High: 65 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 43. Calm wind.

    Low: 43 °F

    Decreasing
    Clouds

  • Friday

    Friday: Mostly sunny, with a high near 64. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 64 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 45. South wind around 5 mph becoming calm.

    Low: 45 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 62. Calm wind becoming east around 5 mph in the afternoon.

    High: 62 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 2am. Cloudy, with a low around 46.

    Low: 46 °F

    Cloudy then
    Chance
    Showers

  • Sunday

    Sunday: Showers likely, mainly after 8am. Cloudy, with a high near 56. Chance of precipitation is 70%.

    High: 56 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely, mainly before 2am. Mostly cloudy, with a low around 47. Chance of precipitation is 70%.

    Low: 47 °F

    Showers
    Likely

  • Memorial Day

    Memorial Day: A 40 percent chance of showers before 5pm. Cloudy, with a high near 65.

    High: 65 °F

    Chance
    Showers

Detailed Forecast

Today
Mostly cloudy, with a high near 65. North wind around 5 mph becoming calm.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 43. Calm wind.
Friday
Mostly sunny, with a high near 64. Calm wind becoming southeast around 5 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 45. South wind around 5 mph becoming calm.
Saturday
Mostly cloudy, with a high near 62. Calm wind becoming east around 5 mph in the afternoon.
Saturday Night
A 30 percent chance of showers after 2am. Cloudy, with a low around 46.
Sunday
Showers likely, mainly after 8am. Cloudy, with a high near 56. Chance of precipitation is 70%.
Sunday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 47. Chance of precipitation is 70%.
Memorial Day
A 40 percent chance of showers before 5pm. Cloudy, with a high near 65.
Monday Night
Mostly cloudy, with a low around 51.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 54.
Wednesday
Mostly sunny, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth NH
 43.05°N 70.78°W (Elev. 49 ft)
Last Update:
2:35 am EDT May 21, 2026
Forecast Valid:
4am EDT May 21, 2026-6pm EDT May 27, 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