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

74°F

23°C

Humidity 90%
Wind Speed SW 3 mph
Barometer 30.06 in (1018.1 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 7 Aug 5:55 am EDT
Extended Forecast for

Portsmouth NH

Heat Advisory August 7, 11:00am until August 7, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Patchy fog before 8am. Otherwise, sunny, with a high near 89. Heat index values as high as 95. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 89 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 71. Calm wind.

    Low: 71 °F

    Patchy Fog

  • Saturday

    Saturday: A slight chance of showers, then a chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 87. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 87 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 10pm. Mostly cloudy, with a low around 70. Calm wind becoming southwest around 5 mph. Chance of precipitation is 30%.

    Low: 70 °F

    Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Sunny and hot, with a high near 90. West wind 5 to 10 mph.

    High: 90 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of showers after noon. Partly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny
    then Chance
    Showers

Detailed Forecast

Today
Patchy fog before 8am. Otherwise, sunny, with a high near 89. Heat index values as high as 95. Calm wind becoming southeast around 5 mph in the afternoon.
Tonight
Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 71. Calm wind.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 87. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 10pm. Mostly cloudy, with a low around 70. Calm wind becoming southwest around 5 mph. Chance of precipitation is 30%.
Sunday
Sunny and hot, with a high near 90. West wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 67.
Monday
Mostly sunny, with a high near 87.
Monday Night
Partly cloudy, with a low around 69.
Tuesday
A 40 percent chance of showers after noon. Partly sunny, with a high near 86.
Tuesday Night
A 30 percent chance of showers before 9pm. Mostly cloudy, with a low around 66.
Wednesday
Mostly sunny, with a high near 84.
Wednesday Night
Partly cloudy, with a low around 65.
Thursday
Mostly sunny, with a high near 83.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth NH
 43.07°N 70.78°W (Elev. 33 ft)
Last Update:
2:44 am EDT Aug 7, 2026
Forecast Valid:
7am EDT Aug 7, 2026-6pm EDT Aug 13, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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