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.

Fog/Mist

49°F

9°C

Humidity 92%
Wind Speed Calm
Barometer 29.90 in (1012.8 mb)
Dewpoint 47°F (8°C)
Visibility 1.50 mi
Last update 16 Apr 7:55 am EDT
Extended Forecast for

New Castle NH

  • Today

    Today: A slight chance of showers before 4pm, then a slight chance of showers after 5pm. Areas of fog before 3pm. Otherwise, mostly cloudy, with a high near 56. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 20%.

    High: 56 °F

    Slight Chance
    Showers and
    Areas Fog

  • Tonight

    Tonight: Showers and thunderstorms likely before 5am, then a chance of showers. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 48. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 48 °F

    Showers
    Likely and
    Patchy Fog

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 11am. Patchy fog before 1pm. Otherwise, mostly cloudy, with a high near 62. West wind around 5 mph becoming northeast in the afternoon. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 62 °F

    Chance
    Showers and
    Patchy Fog

  • Friday Night

    Friday Night: A 30 percent chance of showers before 9pm. Mostly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Chance
    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 51. East wind around 5 mph.

    High: 51 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 5am. Cloudy, with a low around 43.

    Low: 43 °F

    Cloudy then
    Chance
    Showers

  • Sunday

    Sunday: Showers likely, mainly after 9am. Cloudy, with a high near 53. Chance of precipitation is 70%.

    High: 53 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely, mainly before 9pm. Mostly cloudy, with a low around 34. Chance of precipitation is 60%.

    Low: 34 °F

    Showers
    Likely then
    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 44.

    High: 44 °F

    Mostly Sunny

Detailed Forecast

Today
A slight chance of showers before 4pm, then a slight chance of showers after 5pm. Areas of fog before 3pm. Otherwise, mostly cloudy, with a high near 56. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 20%.
Tonight
Showers and thunderstorms likely before 5am, then a chance of showers. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 48. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A chance of showers, with thunderstorms also possible after 11am. Patchy fog before 1pm. Otherwise, mostly cloudy, with a high near 62. West wind around 5 mph becoming northeast in the afternoon. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
A 30 percent chance of showers before 9pm. Mostly cloudy, with a low around 44. Calm wind.
Saturday
Mostly cloudy, with a high near 51. East wind around 5 mph.
Saturday Night
A 30 percent chance of showers after 5am. Cloudy, with a low around 43.
Sunday
Showers likely, mainly after 9am. Cloudy, with a high near 53. Chance of precipitation is 70%.
Sunday Night
Showers likely, mainly before 9pm. Mostly cloudy, with a low around 34. Chance of precipitation is 60%.
Monday
Mostly sunny, with a high near 44.
Monday Night
Mostly clear, with a low around 29.
Tuesday
Sunny, with a high near 49.
Tuesday Night
Mostly cloudy, with a low around 38.
Wednesday
Partly sunny, with a high near 54.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
New Castle NH
 43.07°N 70.72°W (Elev. 26 ft)
Last Update:
6:30 am EDT Apr 16, 2026
Forecast Valid:
8am EDT Apr 16, 2026-6pm EDT Apr 22, 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