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.

Fair

67°F

19°C

Humidity 80%
Wind Speed Calm
Barometer 30.10 in (1019.5 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 29 Jun 8:55 pm EDT
Extended Forecast for

Portsmouth NH

Extreme Heat Watch July 1, 12:00pm until July 3, 08:00pm
Click here for hazard details and duration
Extreme Heat Watch

  • Tonight

    Tonight: Mostly clear, with a low around 59. Calm wind.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 86. Calm wind becoming south around 5 mph in the afternoon.

    High: 86 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Scattered showers and thunderstorms. Mostly cloudy, with a low around 67. South wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Scattered
    Showers

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 94. Heat index values as high as 106. Southwest wind around 5 mph.

    High: 94 °F

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 73. West wind around 5 mph.

    Low: 73 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny and hot, with a high near 99.

    High: 99 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 99.

    High: 99 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 71.

    Low: 71 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 59. Calm wind.
Tuesday
Mostly sunny, with a high near 86. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
Scattered showers and thunderstorms. Mostly cloudy, with a low around 67. South wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Mostly sunny and hot, with a high near 94. Heat index values as high as 106. Southwest wind around 5 mph.
Wednesday Night
Partly cloudy, with a low around 73. West wind around 5 mph.
Thursday
Sunny and hot, with a high near 99.
Thursday Night
Mostly clear, with a low around 75.
Friday
Sunny and hot, with a high near 99.
Friday Night
Partly cloudy, with a low around 71.
Independence Day
A 40 percent chance of showers after 1pm. Partly sunny and hot, with a high near 93.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 68.
Sunday
A 30 percent chance of showers. Mostly sunny, with a high near 88.
Sunday Night
Partly cloudy, with a low around 65.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth NH
 43.05°N 70.75°W (Elev. 13 ft)
Last Update:
2:38 pm EDT Jun 29, 2026
Forecast Valid:
9pm EDT Jun 29, 2026-6pm EDT Jul 6, 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