National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 43.07°N 70.78°W (Text-Only)
NWS Forecast for: Portsmouth NH
Issued by: National Weather Service Gray/Portland, ME
Last Update: 1:50 pm EDT Jul 14, 2025		Print

  • This
    Afternoon

    This Afternoon: Scattered showers and thunderstorms. Mostly cloudy, with a high near 26. South wind around 10 km/h. Chance of precipitation is 50%. New rainfall amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.

    High: 26 °C

    Scattered
    T-storms


  • Tonight

    Tonight: Showers likely and possibly a thunderstorm before 7pm, then scattered showers and thunderstorms between 7pm and 11pm, then isolated showers after 11pm. Mostly cloudy, with a low around 21. Calm wind. Chance of precipitation is 60%. New precipitation amounts between 2.5 and 5 mm possible.

    Low: 21 °C

    Showers
    Likely then
    Isolated
    Showers

  • Tuesday

    Tuesday: A 20 percent chance of showers after 2pm. Mostly cloudy, then gradually becoming sunny, with a high near 31. West wind 5 to 10 km/h becoming southeast in the afternoon.

    High: 31 °C

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Tuesday
    Night

    Tuesday Night: Patchy fog after midnight. Otherwise, mostly clear, with a low around 19. Calm wind.

    Low: 19 °C

    Mostly Clear
    then Patchy
    Fog

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 32. South wind 5 to 10 km/h.

    High: 32 °C

    Hot



  • Wednesday
    Night

    Wednesday Night: Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 22.

    Low: 22 °C

    Partly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, partly sunny, with a high near 31.

    High: 31 °C

    Patchy Fog
    then Chance
    T-storms

  • Thursday
    Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before 8pm. Patchy fog after 2am. Otherwise, partly cloudy, with a low around 22.

    Low: 22 °C

    Chance
    T-storms then
    Patchy Fog

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 31.

    High: 31 °C

    Patchy Fog
    then Chance
    T-storms

    • This Afternoon: Scattered showers and thunderstorms. Mostly cloudy, with a high near 26. South wind around 10 km/h. Chance of precipitation is 50%. New rainfall amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.

    Tonight: Showers likely and possibly a thunderstorm before 7pm, then scattered showers and thunderstorms between 7pm and 11pm, then isolated showers after 11pm. Mostly cloudy, with a low around 21. Calm wind. Chance of precipitation is 60%. New precipitation amounts between 2.5 and 5 mm possible.

    Tuesday: A 20 percent chance of showers after 2pm. Mostly cloudy, then gradually becoming sunny, with a high near 31. West wind 5 to 10 km/h becoming southeast in the afternoon.

    Tuesday Night: Patchy fog after midnight. Otherwise, mostly clear, with a low around 19. Calm wind.

    Wednesday: Mostly sunny and hot, with a high near 32. South wind 5 to 10 km/h.

    Wednesday Night: Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 22.

    Thursday: A 40 percent chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, partly sunny, with a high near 31.

    Thursday Night: A 30 percent chance of showers and thunderstorms before 8pm. Patchy fog after 2am. Otherwise, partly cloudy, with a low around 22.

    Friday: A 30 percent chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 31.

    Friday Night: A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 18.

    Saturday: Mostly sunny, with a high near 27.

    Saturday Night: Partly cloudy, with a low around 18.

    Sunday: A 30 percent chance of showers. Partly sunny, with a high near 27.

    Sunday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 18.

    Monday: Mostly sunny, with a high near 27.


    Portsmouth NH
     43.07°N 70.78°W (Elev. 33 m)

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