HTTP/1.1 200 OK Server: Apache X-Content-Type-Options: nosniff X-XSS-Protection: 1; mode=block Content-Security-Policy: default-src 'none'; style-src 'self' code.jquery.com *.arcgis.com cdn.jsdelivr.net 'unsafe-inline'; script-src-elem 'self' cdn.gov.cfigroup.com *.digitalgov.gov *.google-analytics.com *.arcgis.com code.jquery.com www.googletagmanager.com s.go-mpulse.net 'unsafe-inline'; img-src 'self' data: *.ncep.noaa.gov *.noaa.gov *.weather.gov *.arcgisonline.com *.arcgis.com maps.google.com; connect-src 'self' *.google-analytics.com *.arcgis.com opengeo.ncep.noaa.gov *.weather.gov; font-src 'self' cdn.jsdelivr.net; script-src 'unsafe-eval' 'unsafe-inline' Referrer-Policy: strict-origin-when-cross-origin Strict-Transport-Security: max-age=31536000; includeSubdomains; preload; Access-Control-Allow-Origin: * Content-Type: text/html; charset=UTF-8 Cache-Control: max-age=900 Expires: Tue, 30 Jun 2026 12:08:49 GMT Date: Tue, 30 Jun 2026 11:53:49 GMT Content-Length: 26865 Connection: keep-alive National Weather Service
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: 6:48 am EDT Jun 30, 2026		Print

  • Today

    Today: Mostly sunny, with a high near 86. Light and variable wind becoming south 5 to 10 mph in the afternoon.

    High: 86 °F

    Mostly Sunny


  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Southwest wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 97. Heat index values as high as 107. Southwest wind around 5 mph.

    High: 97 °F

    Hot


  • Wednesday
    Night

    Wednesday Night: Partly cloudy, with a low around 75. Southwest wind around 5 mph.

    Low: 75 °F

    Partly Cloudy


  • Thursday

    Thursday: Sunny and hot, with a high near 101. West wind around 5 mph.

    High: 101 °F

    Hot


  • Thursday
    Night

    Thursday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear


  • Friday

    Friday: Sunny and hot, with a high near 101.

    High: 101 °F

    Hot


  • Friday
    Night

    Friday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear


  • Independence
    Day

    Independence Day: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 90.

    High: 90 °F

    Mostly Sunny
    then Chance
    T-storms



    • Today: Mostly sunny, with a high near 86. Light and variable wind becoming south 5 to 10 mph in the afternoon.

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Southwest wind around 5 mph. Chance of precipitation is 40%. 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 97. Heat index values as high as 107. Southwest wind around 5 mph.

    Wednesday Night: Partly cloudy, with a low around 75. Southwest wind around 5 mph.

    Thursday: Sunny and hot, with a high near 101. West wind around 5 mph.

    Thursday Night: Mostly clear, with a low around 76.

    Friday: Sunny and hot, with a high near 101.

    Friday Night: Mostly clear, with a low around 72.

    Independence Day: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 90.

    Saturday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 9pm. Partly cloudy, with a low around 68. Chance of precipitation is 30%.

    Sunday: Mostly sunny, with a high near 89.

    Sunday Night: Partly cloudy, with a low around 65.

    Monday: Partly sunny, with a high near 82.


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

    Visit your local NWS office at: https://www.weather.gov/gyx/