How is the weather in Portsmouth Harbor, NH?

At 3:39 AM on Mon, Sep 15, 2025 it is clear and 55 degrees Fahrenheit, feeling like 55 degrees.

Portsmouth Harbor, NH Weather Forecast and Current Conditions

55°F
Feels Like 55°F

Humidity 99% Dew Point 55°F Wind NW 2 MPH Gusts 3 Barometer 30 in.762.0 mm

Solar Rad 0 w/m2

Report from 1.1 miles N of central Portsmouth Harbor at 3:39 AM Mon, Sep 15, 2025

Current Weather

55°F
Feels Like 55°F

Humidity 99% Dew Point 55°F Wind NW 2 MPH Gusts 3 Barometer 30 in.762.0 mm

Solar Rad 0 w/m2

Report from 1.1 miles N of central Portsmouth Harbor at 3:39 AM Mon, Sep 15, 2025

Forecast at a Glance

MonSep 15

69°

54°

TueSep 16

20%

71°

52°

WedSep 17

70°

57°

ThuSep 18

10%

76°

60°

FriSep 19

74°

47°

SatSep 20

65°

48°

SunSep 21

65°

54°

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

Day: Mostly Sunny with a high near 69°F. Winds from the NNE at 5 mph

Night: Mostly Clear with a low near 54°F. Winds from the SSE at 2 mph

Tuesday Sep 16

Day: Mostly Sunny with a high near 71°F. Winds from the NW at 1 mph. Chance of precipitation is 20%

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

Wednesday Sep 17

Day: Partly Cloudy with a high near 70°F. Winds from the WSW at 2 mph

Night: Partly Cloudy with a low near 57°F. Winds from the SSE at 5 mph

Thursday Sep 18

Day: Partly Cloudy with Showers with a high near 76°F. Winds from the SW at 2 mph. Chance of precipitation is 10%

Night: Mostly Clear with a low near 60°F. Winds from the S at 5 mph

Friday Sep 19

Day: Mostly Sunny with a high near 74°F. Winds from the W at 4 mph

Night: Mostly Clear with a low near 47°F. Winds from the NNW at 7 mph

Saturday Sep 20

Day: Sunny with a high near 65°F. Winds from the N at 8 mph

Night: Clear with a low near 48°F. Winds from the E at 4 mph

Sunday Sep 21

Day: Mostly Sunny with a high near 65°F. Winds from the WSW at 3 mph

Night: Mostly Clear with a low near 54°F. Winds from the S at 7 mph

Monday Sep 22

Day: Partly Cloudy with Showers with a high near 68°F. Winds from the WSW at 4 mph. Chance of precipitation is 10%

Night: Partly Cloudy with Showers with a low near 59°F. Winds from the S at 6 mph. Chance of precipitation is 10%

Tuesday Sep 23

Day: Partly Cloudy with Showers with a high near 69°F. Winds from the WSW at 4 mph. Chance of precipitation is 10%

Night: Partly Cloudy with Showers with a low near 60°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 69°F. Winds from the W at 5 mph. Chance of precipitation is 10%

Night: Partly Cloudy with Showers with a low near 58°F. Winds from the SSE 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)

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Weather Near Portsmouth Harbor

Contiguous United States Extremes

Sun's High Temperature
108 at Death Valley, CA

Sun's Low Temperature
18 at 27 Miles South Of Bonanza, UT

Weather Folklore

Underground miners can smell rain coming.

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