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

18°C

64°F

Humidity 96%
Wind Speed SE 9 km/h
Barometer 1020.2 mb (30.12 in)
Dewpoint 17°C (63°F)
Visibility 0.40 km
Last update 13 Jul 1:55 am EDT
Extended Forecast for

Portsmouth NH

  • Overnight

    Overnight: Patchy drizzle. Areas of dense fog. Otherwise, cloudy, with a low around 17. Calm wind.

    Low: 17 °C

    Patchy
    Drizzle and
    Areas Dense
    Fog

  • Sunday

    Sunday: Patchy drizzle before 8am. Areas of dense fog before 11am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 24. Southeast wind 5 to 15 km/h.

    High: 24 °C

    Patchy
    Drizzle and
    Areas Dense
    Fog then
    Partly Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 18. Southeast wind 5 to 10 km/h.

    Low: 18 °C

    Patchy Fog

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 2pm. Areas of fog before 8am. Otherwise, partly sunny, with a high near 27. South wind 5 to 10 km/h.

    High: 27 °C

    Areas Fog
    then Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 20. Calm wind.

    Low: 20 °C

    Chance
    T-storms then
    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 31.

    High: 31 °C

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 20.

    Low: 20 °C

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 32.

    High: 32 °C

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 22.

    Low: 22 °C

    Partly Cloudy

Detailed Forecast

Overnight
Patchy drizzle. Areas of dense fog. Otherwise, cloudy, with a low around 17. Calm wind.
Sunday
Patchy drizzle before 8am. Areas of dense fog before 11am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 24. Southeast wind 5 to 15 km/h.
Sunday Night
Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 18. Southeast wind 5 to 10 km/h.
Monday
A 30 percent chance of showers and thunderstorms after 2pm. Areas of fog before 8am. Otherwise, partly sunny, with a high near 27. South wind 5 to 10 km/h.
Monday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 20. Calm wind.
Tuesday
Mostly sunny, with a high near 31.
Tuesday Night
Mostly clear, with a low around 20.
Wednesday
Mostly sunny and hot, with a high near 32.
Wednesday Night
Partly cloudy, with a low around 22.
Thursday
A 30 percent chance of showers and thunderstorms after 2pm. Partly sunny and hot, with a high near 32.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 22.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 31.
Friday Night
A 30 percent chance of showers. Partly cloudy, with a low around 19.
Saturday
Mostly sunny, with a high near 28.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portsmouth NH
 43.05°N 70.78°W (Elev. 49 m)
Last Update:
1:39 am EDT Jul 13, 2025
Forecast Valid:
3am EDT Jul 13, 2025-6pm EDT Jul 19, 2025
 
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Additional Resources

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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