National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Pease Air Force Base / Portsmouth (KPSM)

Lat: 43.08°NLon: 70.82°WElev: 102ft.

Overcast

76°F

24°C

Humidity 85%
Wind Speed Calm
Barometer 29.83 in (1010.4 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 19 May 5:55 pm EDT
Extended Forecast for

New Castle NH

Heat Advisory until May 19, 08:00pm
Click here for hazard details and duration
...
  •  
    Heat Advisory until May 19, 08:00pm

    NOW until 8:00pm Tue

    Heat Advisory

  • Tonight

    Low: 66 °F

    Chance
    Showers then
    Partly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly between 3pm and 4pm. Mostly sunny, with a high near 84. West wind around 10 mph, with gusts as high as 20 mph.

    High: 84 °F

    Mostly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 52. Northwest wind around 5 mph.

    Low: 52 °F

    Mostly Cloudy

  • Thursday

    Thursday: Cloudy, then gradually becoming mostly sunny, with a high near 64. Northwest wind around 5 mph becoming southeast in the afternoon.

    High: 64 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 47. West wind around 5 mph becoming north in the evening.

    Low: 47 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 48.

    Low: 48 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of showers after 9am. Mostly cloudy, with a high near 57.

    High: 57 °F

    Chance
    Showers

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 66. Southwest wind 5 to 10 mph. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly between 3pm and 4pm. Mostly sunny, with a high near 84. West wind around 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly cloudy, with a low around 52. Northwest wind around 5 mph.
Thursday
Cloudy, then gradually becoming mostly sunny, with a high near 64. Northwest wind around 5 mph becoming southeast in the afternoon.
Thursday Night
Mostly clear, with a low around 47. West wind around 5 mph becoming north in the evening.
Friday
Mostly sunny, with a high near 63.
Friday Night
Mostly cloudy, with a low around 48.
Saturday
A 30 percent chance of showers after 9am. Mostly cloudy, with a high near 57.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 46.
Sunday
A 50 percent chance of showers. Mostly cloudy, with a high near 56.
Sunday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 46.
Memorial Day
A 40 percent chance of showers. Mostly cloudy, with a high near 60.
Monday Night
Mostly cloudy, with a low around 48.
Tuesday
Partly sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
New Castle NH
 43.04°N 70.72°W (Elev. 3 ft)
Last Update:
2:31 pm EDT May 19, 2026
Forecast Valid:
6pm EDT May 19, 2026-6pm EDT May 26, 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