Portsmouth Water Temperature
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The coldest month is March with an average water temperature of 37.8°F / 3.2°C.
October is the driest at 0in / 0mm and January the wettest month with 1.1in / 28.2mm.
With an average air temperature of 71.4°F / 21.9°C, July is the warmest month in a year. January is the coldest with 25.2°F / -3.8°C average air temperature.
The Climate is described as Warm-summer humid continental climate. Best time to Visit would be in June, July, August, September.
Portsmouth Summary
Description | Value |
---|---|
Current water temperature | / |
Warmest Month Water Temperature: | August with 64.2°F / 17.9°C |
Coldest Month Water Temperature: | March with 37.8°F / 3.2°C |
Warmest Month Air Temperature: | July with 71.4°F / 21.9°C |
Coldest Month Air Temperature: | January with 25.2°F / -3.8°C |
Wettest Month: | January with 1.1in / 28.2mm |
Driest Month: | October with 0in / 0mm |
Highest Humidity | August with 75.4% |
Lowest Humidity | February with 66.3% |
Best Time to Visit: | June, July, August, September |
Climate Classification | Warm-summer humid continental climate |
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Portsmouth water temperature by month
Gulf of Maine water temperature by month
Max. Water
Temperature (°F) |
ø. Water
Temperature (°F) |
Min. Water
Temperature (°F) |
|
---|---|---|---|
January |
43.2 | 41.4 | 39.6 |
February |
39.6 | 38.7 | 37.9 |
March |
38.8 | 37.9 | 37.6 |
April |
44.2 | 41.2 | 38.8 |
May |
51.8 | 47.7 | 44.4 |
June |
59.4 | 55.4 | 51.8 |
July |
64.2 | 62.1 | 58.6 |
August |
64.8 | 64 | 62.6 |
September |
63.1 | 60.6 | 58.1 |
October |
57.9 | 54.5 | 51.1 |
November |
51.1 | 49.1 | 47.1 |
December |
47.1 | 45.1 | 43.2 |
Gulf of Maine water temperature by month
Max. Water
Temperature (°C) |
ø. Water
Temperature (°C) |
Min. Water
Temperature (°C) |
|
---|---|---|---|
January |
6.2 | 5.2 | 4.2 |
February |
4.2 | 3.7 | 3.3 |
March |
3.8 | 3.3 | 3.1 |
April |
6.8 | 5.1 | 3.8 |
May |
11 | 8.7 | 6.9 |
June |
15.2 | 13 | 11 |
July |
17.9 | 16.7 | 14.8 |
August |
18.2 | 17.8 | 17 |
September |
17.3 | 15.9 | 14.5 |
October |
14.4 | 12.5 | 10.6 |
November |
10.6 | 9.5 | 8.4 |
December |
8.4 | 7.3 | 6.2 |
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Portsmouth weather today & 14-day weather forecast
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Portsmouth weather by month / climate table
Max. Temperature °F | ø. Temperature °F | Min. Temperature (°F) |
Precip. (in) |
Rainy Days (d) |
Rel. Humidity (%) |
|
---|---|---|---|---|---|---|
January |
37.4 | 25.2 | 13.5 | 1.1 | 1 | 67.8% |
February |
37.8 | 27.1 | 15.6 | 0.8 | 0 | 66.3% |
March |
47.5 | 34 | 21.7 | 0.3 | 0 | 67.4% |
April |
58.8 | 45 | 32.7 | 0.6 | 4 | 66.6% |
May |
71.2 | 55 | 42.8 | 0.5 | 1 | 72.3% |
June |
78.4 | 64.4 | 53.4 | 0.6 | 1 | 75.2% |
July |
81.1 | 71.4 | 63.5 | 0.2 | 2 | 74.1% |
August |
79.9 | 70.3 | 61.5 | 0.2 | 0 | 75.4% |
September |
75.9 | 64.2 | 54.7 | 0.2 | 1 | 75.2% |
October |
64.4 | 52.3 | 40.6 | 0 | 0 | 73.1% |
November |
57 | 42.1 | 31.8 | 0 | 0 | 71.3% |
December |
43.7 | 32.5 | 23.4 | 0.2 | 0 | 69.5% |
Max. Temperature °C | ø. Temperature °C | Min. Temperature (°C) |
Precip. (mm) |
Rainy Days (d) |
Rel. Humidity (%) |
|
---|---|---|---|---|---|---|
January |
3 | -3.8 | -10.3 | 28.2 | 1 | 67.8% |
February |
3.2 | -2.7 | -9.1 | 20.5 | 0 | 66.3% |
March |
8.6 | 1.1 | -5.7 | 6.5 | 0 | 67.4% |
April |
14.9 | 7.2 | 0.4 | 14.9 | 4 | 66.6% |
May |
21.8 | 12.8 | 6 | 11.9 | 1 | 72.3% |
June |
25.8 | 18 | 11.9 | 16.3 | 1 | 75.2% |
July |
27.3 | 21.9 | 17.5 | 4.7 | 2 | 74.1% |
August |
26.6 | 21.3 | 16.4 | 4.6 | 0 | 75.4% |
September |
24.4 | 17.9 | 12.6 | 5.7 | 1 | 75.2% |
October |
18 | 11.3 | 4.8 | 0 | 0 | 73.1% |
November |
13.9 | 5.6 | -0.1 | 0 | 0 | 71.3% |
December |
6.5 | 0.3 | -4.8 | 5.5 | 0 | 69.5% |
Activities & POI in Portsmouth
Type of Activity | List |
---|---|
Attraction | Wentworth-Coolidge Historic Site |