Portsmouth, NH Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Mon
Jun 29 		Mostly Sunny
Close Hourly 		77º / 60º 5% ENE 7 mph 71%
4am Mostly Clear 61º 4% N 1 mph 98%
5am Mostly Clear 60º 3% N 2 mph 95%
6am Sunny 62º 2% N 2 mph 93%
7am Sunny 64º 2% NNE 3 mph 87%
8am Sunny 68º 2% NNE 2 mph 79%
9am Sunny 72º 1% NE 3 mph 70%
10am Sunny 75º 1% ENE 3 mph 63%
11am Sunny 76º 4% E 5 mph 59%
12pm Sunny 76º 5% E 6 mph 58%
1pm Sunny 75º 4% SE 7 mph 59%
2pm Sunny 75º 2% ESE 7 mph 60%
3pm Sunny 75º 2% SE 6 mph 60%
4pm Mostly Sunny 74º 2% SE 7 mph 62%
5pm Mostly Sunny 73º 2% SSE 7 mph 62%
6pm Sunny 73º 3% SSE 6 mph 63%
7pm Sunny 70º 4% SSE 5 mph 68%
8pm Sunny 68º 5% SSE 4 mph 71%
9pm Clear 67º 6% SSE 4 mph 74%
10pm Partly Cloudy 65º 7% S 3 mph 77%
11pm Partly Cloudy 65º 6% S 3 mph 78%
Tue
Jun 30 		Partly Cloudy
View Hourly 		84º / 69º 16% SSW 9 mph 63%
12am Partly Cloudy 64º 5% SSW 3 mph 80%
1am Mostly Clear 63º 7% SSW 3 mph 83%
2am Partly Cloudy 62º 6% SSW 3 mph 86%
3am Clear 62º 7% SW 3 mph 89%
4am Partly Cloudy 61º 7% SW 2 mph 92%
5am Mostly Clear 61º 8% SW 2 mph 93%
6am Mostly Sunny 62º 8% SW 2 mph 93%
7am Partly Cloudy 65º 7% SSW 2 mph 88%
8am Partly Cloudy 69º 5% SW 3 mph 79%
9am Partly Cloudy 73º 4% SW 4 mph 72%
10am Partly Cloudy 77º 2% SW 5 mph 63%
11am Partly Cloudy 80º 2% SSW 6 mph 60%
12pm Mostly Cloudy 82º 2% S 7 mph 56%
1pm Mostly Cloudy 83º 5% S 9 mph 54%
2pm Mostly Cloudy 82º 5% SSE 9 mph 55%
3pm Mostly Cloudy 82º 16% S 8 mph 56%
4pm Mostly Cloudy 82º 5% S 8 mph 56%
5pm Partly Cloudy 81º 6% S 9 mph 57%
6pm Partly Cloudy 80º 6% S 9 mph 59%
7pm Partly Cloudy 79º 7% S 8 mph 61%
8pm Mostly Cloudy 78º 9% S 8 mph 64%
9pm Mostly Cloudy 75º 10% SSW 7 mph 70%
10pm Mostly Cloudy 75º 10% SSW 8 mph 72%
11pm Cloudy 73º 9% SSW 7 mph 75%
Wed
Jul 1 		Partly Cloudy
View Hourly 		90º / 73º 18% SW 8 mph 64%
12am Cloudy 72º 21% SSW 7 mph 76%
1am Scattered Thunderstorms 71º 48% SW 8 mph 78%
2am Scattered Thunderstorms 70º 38% SSW 7 mph 82%
3am Mostly Cloudy 70º 16% SW 7 mph 82%
Thu
Jul 2 		Mostly Sunny 96º / 73º 15% W 9 mph 56%
Fri
Jul 3 		Mostly Sunny 94º / 72º 23% WNW 9 mph 54%
Sat
Jul 4 		PM Thunderstorms 86º / 68º 52% SW 7 mph 62%
Sun
Jul 5 		PM Showers 86º / 67º 34% W 9 mph 64%
Mon
Jul 6 		PM Showers 76º / 64º 36% E 9 mph 74%

Weather Radar for Portsmouth, NH See Radar

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* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for Portsmouth, NH

Monday
High : 71ºF
Variable winds 5 kt or less. Mostly sunny. Seas 1 ft or less.
Monday Night
Low : 60ºF
Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.
Tuesday
High : 77ºF
Variable winds 5 kt or less. A chance of showers, mainly after 3pm. Seas 1 ft or less.
Tuesday Night
Low : 61ºF
SSW wind around 10 kt. Showers likely, mainly between 9pm and 2am. Seas 1 ft or less.
Wednesday
High : 81ºF
Variable winds 5 kt or less. A chance of showers before 8am. Seas 1 ft or less.
Wednesday Night
Low : 65ºF
Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.
Thursday
High : 85ºF
Variable winds 5 kt or less. Mostly sunny. Seas 1 ft or less.
Thursday Night
Low : 67ºF
Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.
Friday
High : 84ºF
Variable winds 5 kt or less. A chance of showers. Seas 1 ft or less.

NOAA Buoy Data Near Portsmouth, NH See Map

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    Wind Speed Forecast for Portsmouth, NH

    MondayTuesdayWednesday
    Wind Speed (MPH) 126743237887
    8am12pm4pm8pm12am4am8am12pm4pm8pm12am4am
    MPH 126743237887
    DIR NNNEESESSESSWSWSWSSSSSW

    Current Weather Conditions In Portsmouth, NH

    As Of: 19 minutes ago

    • 61ºF
    • 61ºF
    • 1mph
    • 0º (N)
    • 1mph
    • Mostly Clear
    • 9mi
    • 30.01"
    • 98%
    • 0ºF

    The weather right now in Portsmouth, NH is Mostly Clear. The current temperature is 61°F, and the expected high and low for today, Monday, June 29, 2026, are 77° high temperature and 60°F low temperature. The wind is currently blowing at 1 miles per hour, and coming from the North. The wind is gusting to 1 mph. With the wind and the atmosphere the temperature feels like 61° Fahrenheit. Expected precipitation is 4 percent, with current humidity at 98 percent, and air pressure at 30.01 in. Visibility is 9 nautical miles. There are 1 current weather alert(s).

     

    Weather Alerts
    Extreme Heat Watch - 2:18am Mon Jun 29 2026

    ...EXTREME HEAT WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH FRIDAY EVENING...

    WHAT: Dangerously hot conditions with heat index values up to 110
    possible.

    WHERE: Portions of south central, southwest, and western Maine
    and central, northern, and southern New Hampshire.

    WHEN: From Wednesday afternoon through Friday evening.

    IMPACTS: Heat related illnesses increase significantly during
    extreme heat and high humidity events.

    ADDITIONAL DETAILS: Overnight low temperatures will only fall
    into the 70s, resulting in accumulated heat stress.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    Drink plenty of fluids, stay in an air-conditioned room, stay out of
    the sun, and check up on relatives and neighbors.

    Do not leave young children and pets in unattended vehicles. Car
    interiors will reach lethal temperatures in a matter of minutes.

    &&