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 68%
Wind Speed SE 8 mph
Barometer 29.90 in (1012.8 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 17 Apr 2:55 pm EDT
Extended Forecast for

Portsmouth NH

  • This Afternoon

    This Afternoon: A 20 percent chance of showers. Mostly sunny, with a high near 61. East wind around 5 mph.

    High: 61 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Increasing clouds, with a low around 43. Calm wind.

    Low: 43 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Patchy dense fog before 11am. Otherwise, mostly cloudy, with a high near 52. East wind 5 to 10 mph.

    High: 52 °F

    Patchy Dense
    Fog then
    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 5am. Patchy fog after 1am. Otherwise, cloudy, with a low around 41. Calm wind.

    Low: 41 °F

    Cloudy then
    Chance
    Showers and
    Patchy Fog

  • Sunday

    Sunday: A chance of showers before 9am, then rain, mainly after 9am. Patchy fog before 9am. High near 49. Southeast wind 5 to 10 mph becoming west in the afternoon. Chance of precipitation is 90%.

    High: 49 °F

    Rain and
    Patchy Fog

  • Sunday Night

    Sunday Night: A 30 percent chance of rain before 10pm. Partly cloudy, with a low around 33.

    Low: 33 °F

    Chance Rain
    then Mostly
    Clear

  • Monday

    Monday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 47.

    High: 47 °F

    Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers. Mostly sunny, with a high near 61. East wind around 5 mph.
Tonight
Increasing clouds, with a low around 43. Calm wind.
Saturday
Patchy dense fog before 11am. Otherwise, mostly cloudy, with a high near 52. East wind 5 to 10 mph.
Saturday Night
A 30 percent chance of showers after 5am. Patchy fog after 1am. Otherwise, cloudy, with a low around 41. Calm wind.
Sunday
A chance of showers before 9am, then rain, mainly after 9am. Patchy fog before 9am. High near 49. Southeast wind 5 to 10 mph becoming west in the afternoon. Chance of precipitation is 90%.
Sunday Night
A 30 percent chance of rain before 10pm. Partly cloudy, with a low around 33.
Monday
Mostly sunny, with a high near 49.
Monday Night
Partly cloudy, with a low around 29.
Tuesday
Sunny, with a high near 47.
Tuesday Night
A 30 percent chance of showers after 4am. Mostly cloudy, with a low around 36.
Wednesday
A 30 percent chance of showers. Partly sunny, with a high near 55.
Wednesday Night
Partly cloudy, with a low around 36.
Thursday
Mostly sunny, with a high near 56.
Thursday Night
Partly cloudy, with a low around 38.
Friday
Mostly sunny, with a high near 57.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth NH
 43.07°N 70.78°W (Elev. 33 ft)
Last Update:
2:40 pm EDT Apr 17, 2026
Forecast Valid:
3pm EDT Apr 17, 2026-6pm EDT Apr 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