How is the weather in Portsmouth Harbor, NH?

At 6:29 PM on Mon, Sep 15, 2025 it is mostly sunny and 62 degrees Fahrenheit, feeling like 62 degrees.

Portsmouth Harbor, NH Weather Forecast and Current Conditions

62°F
Feels Like 62°F

Humidity 95% Dew Point 61°F Wind SSW 3 MPH Gusts 5 Barometer 30.12 in.765.0 mm

Solar Rad 11 w/m2

Report from 1.1 miles N of central Portsmouth Harbor at 6:29 PM Mon, Sep 15, 2025

Current Weather

62°F
Feels Like 62°F

Humidity 95% Dew Point 61°F Wind SSW 3 MPH Gusts 5 Barometer 30.12 in.765.0 mm

Solar Rad 11 w/m2

Report from 1.1 miles N of central Portsmouth Harbor at 6:29 PM Mon, Sep 15, 2025

Forecast at a Glance

MonSep 15

54°

TueSep 16

20%

70°

52°

WedSep 17

69°

56°

ThuSep 18

20%

74°

59°

FriSep 19

75°

47°

SatSep 20

64°

47°

SunSep 21

66°

55°

This Date in Weather History

1910 - Rains of .27 inch on the 14th and .73 inch on the 15th were the earliest and heaviest of record for Fresno CA, which, along with much of California, experiences a ""rainy season"" in the winter.

Portsmouth Harbor 7 Day Weather Forecast Details

Monday Sep 15

Night: Mostly Clear with a low near 54°F. Winds from the SE at 3 mph

Tuesday Sep 16

Day: Mostly Sunny with a high near 70°F. Winds from the N at 2 mph. Chance of precipitation is 20%

Night: Partly Cloudy with Patchy Fog with a low near 52°F. Winds from the SSE at 3 mph

Wednesday Sep 17

Day: Partly Cloudy with a high near 69°F. Winds from the WNW at 2 mph

Night: Partly Cloudy with Isolated Showers with a low near 56°F. Winds from the SSE at 4 mph. Chance of precipitation is 20%

Thursday Sep 18

Day: Partly Cloudy with Isolated Showers with a high near 74°F. Winds from the W at 2 mph. Chance of precipitation is 20%

Night: Mostly Clear with a low near 59°F. Winds from the S at 5 mph

Friday Sep 19

Day: Mostly Sunny with a high near 75°F. Winds from the W at 5 mph

Night: Mostly Clear with a low near 47°F. Winds from the NW at 6 mph

Saturday Sep 20

Day: Sunny with a high near 64°F. Winds from the N at 6 mph

Night: Mostly Clear with a low near 47°F. Winds from the SE at 4 mph

Sunday Sep 21

Day: Mostly Sunny with a high near 66°F. Winds from the SW at 3 mph

Night: Mostly Clear with a low near 55°F. Winds from the S at 8 mph

Monday Sep 22

Day: Mostly Sunny with a high near 69°F. Winds from the SW at 4 mph

Night: Partly Cloudy with a low near 58°F. Winds from the S at 7 mph

Tuesday Sep 23

Day: Partly Cloudy with Showers with a high near 71°F. Winds from the SW at 4 mph. Chance of precipitation is 10%

Night: Partly Cloudy with Showers with a low near 62°F. Winds from the S at 6 mph. Chance of precipitation is 10%

Wednesday Sep 24

Day: Partly Cloudy with Showers with a high near 71°F. Winds from the SW at 5 mph. Chance of precipitation is 10%

Night: Partly Cloudy with Showers with a low near 60°F. Winds from the SW at 6 mph. Chance of precipitation is 10%

Thursday Sep 25

Day: Partly Cloudy with Showers with a high near 68°F. Winds from the W at 6 mph. Chance of precipitation is 10%

Sun & Moon Monthly

First Light 5:55 AM

Sunrise 6:23 AM

Sunset 6:54 PM

Last Light 7:23 PM

Moonrise ------

Moonset 3:49 PM

Moon Phase

Close Tide Stations

Fort Point
(0.4 miles away)

Jaffrey Point
(0.7 miles away)

Gerrish Island
(1 miles away)

Data costs money. Servers cost money. Our website is made possible by displaying online advertisements to our visitors. Please consider supporting us by disabling your ad blocker, contribute to WeatherForYou.com by buying me a coffee or subscribe to our ClearSky ad-free service.

Weather Near Portsmouth Harbor

Contiguous United States Extremes

Sun's High Temperature
108 at Death Valley, CA

Mon's Low Temperature
27 at 9 Miles East-southeast Of Creede, CO

Weather Folklore

Look for foam on the river before a rain.

Current subscribers - login to your ClearSky account