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.

Partly Cloudy

88°F

31°C

Humidity 61%
Wind Speed SE 6 mph
Barometer 29.86 in (1011.3 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 1 Jul 5:55 pm EDT
Extended Forecast for

Portsmouth NH

Extreme Heat Warning July 1, 06:34pm until July 3, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 1, 06:34pm until July 3, 08:00pm

    NOW until 8:00pm Fri

    Extreme Heat Warning

  • Tonight

    Low: 75 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny and hot, with a high near 101. Heat index values as high as 112. West wind around 5 mph.

    High: 101 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 76. West wind around 5 mph.

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 100. Heat index values as high as 108. West wind around 5 mph.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 73. Calm wind.

    Low: 73 °F

    Mostly Clear

  • Independence Day

    Independence Day: Mostly sunny and hot, with a high near 93.

    High: 93 °F

    Hot

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

Detailed Forecast

Tonight
Partly cloudy, with a low around 75. Southwest wind around 5 mph.
Thursday
Sunny and hot, with a high near 101. Heat index values as high as 112. West wind around 5 mph.
Thursday Night
Mostly clear, with a low around 76. West wind around 5 mph.
Friday
Sunny and hot, with a high near 100. Heat index values as high as 108. West wind around 5 mph.
Friday Night
Mostly clear, with a low around 73. Calm wind.
Independence Day
Mostly sunny and hot, with a high near 93.
Saturday Night
Partly cloudy, with a low around 67.
Sunday
Mostly sunny, with a high near 85.
Sunday Night
A 30 percent chance of showers after 8pm. Mostly cloudy, with a low around 64.
Monday
A 30 percent chance of showers after 2pm. Partly sunny, with a high near 79.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 62.
Tuesday
Partly sunny, with a high near 81.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
Mostly sunny, with a high near 84.
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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 Jul 1, 2026
Forecast Valid:
6pm EDT Jul 1, 2026-6pm EDT Jul 8, 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