Portland Water Temperature

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Portland is a city close to Gulf of Maine. August is the month with the hottest water temperature at 63.5°F / 17.5°C. The coldest month is March with an ø water temperature of 37.2°F / 2.9°C. October is the month with the lowest precipitation of 0in / 0mm and January with the highest precipitation in a year with 1.7in / 43.1mm. The avg. air temperature is around 69.3°F / 20.7°C, July is the month with the highest temperature. January is the coolest with 24.1°F / -4.4°C average air temperature. June, July, August, September would be the best time to visit. Warm-summer humid continental climate would be the climate here.

Portland Summary

Description Value
Current water temperature /
Warmest Month Water Temperature: August with 63.5°F / 17.5°C
Coldest Month Water Temperature: March with 37.2°F / 2.9°C
Warmest Month Air Temperature: July with 69.3°F / 20.7°C
Coldest Month Air Temperature: January with 24.1°F / -4.4°C
Wettest Month: January with 1.7in / 43.1mm
Driest Month: October with 0in / 0mm
Highest Humidity June with 76%
Lowest Humidity April with 67.6%
Best Time to Visit: June, July, August, September
Climate Classification Warm-summer humid continental climate

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Portland water temperature by month

Gulf of Maine water temperature by month

Max. Water

Temperature (°F)

ø. Water

Temperature (°F)

Min. Water

Temperature (°F)

January

42.6 40.8 38.8

February

38.7 37.8 37.2

March

38.5 37.4 36.9

April

44.1 40.8 38.5

May

51.3 47.5 44.1

June

58.6 55 51.3

July

63.5 61.3 58.1

August

64.2 63.3 61.9

September

62.6 60.1 57.6

October

57.4 54.1 50.7

November

50.9 48.7 46.8

December

46.8 44.6 42.6

Gulf of Maine water temperature by month

Max. Water

Temperature (°C)

ø. Water

Temperature (°C)

Min. Water

Temperature (°C)

January

5.9 4.9 3.8

February

3.7 3.2 2.9

March

3.6 3 2.7

April

6.7 4.9 3.6

May

10.7 8.6 6.7

June

14.8 12.8 10.7

July

17.5 16.3 14.5

August

17.9 17.4 16.6

September

17 15.6 14.2

October

14.1 12.3 10.4

November

10.5 9.3 8.2

December

8.2 7 5.9
August is the month with the highest water temperature at 63.5°F / 17.5°C. The month with the lowest is March with an average water temperature of 37.2°F / 2.9°C.

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Portland weather today & 14-day weather forecast

Date
Weather
Max. F
Min. F
Max. C
Min. C
Windspeed
Windir.
Precip.
Rainrisk
Rel. Humidity
Jul. 12
Few clouds
89 °F
63°F
32 °C
17°C
2mph (3km/h)
north-northwest
0in (0mm)
0 %
64%
Jul. 13
Few clouds
93 °F
64°F
34 °C
18°C
2mph (3km/h)
north-northwest
0in (0mm)
0 %
59%
Jul. 14
Few clouds
85 °F
64°F
29 °C
18°C
2mph (3km/h)
north-northwest
0in (0mm)
0 %
63%
Jul. 15
Few clouds
91 °F
59°F
33 °C
15°C
1mph (2km/h)
north-northwest
0in (0mm)
0 %
61%
Jul. 16
Few clouds
95 °F
62°F
35 °C
17°C
1mph (2km/h)
east
0in (0mm)
0 %
50%
Jul. 17
Few clouds
84 °F
63°F
29 °C
17°C
2mph (3km/h)
west-northwest
0in (0mm)
0 %
54%
Jul. 18
Clear Sky
80 °F
66°F
27 °C
19°C
2mph (3km/h)
northwest
0in (0mm)
0 %
57%
Date
Weather
Max. F
Min. F
Max. C
Min. C
Windspeed
Windir.
Precip.
Rainrisk
Rel. Humidity
Jul. 19
Clear Sky
80 °F
66°F
27 °C
19°C
2mph (3km/h)
west-northwest
0in (0mm)
0 %
53%
Jul. 20
Scattered clouds
80 °F
67°F
27 °C
19°C
2mph (3km/h)
west-northwest
0in (0mm)
0 %
54%
Jul. 21
Overcast clouds
77 °F
67°F
25 °C
20°C
2mph (3km/h)
northwest
0in (0mm)
0 %
55%
Jul. 22
Few clouds
88 °F
57°F
31 °C
14°C
1mph (2km/h)
south
0in (0mm)
0 %
52%
Jul. 23
Clear Sky
96 °F
57°F
36 °C
14°C
1mph (1km/h)
south-southeast
0in (0mm)
0 %
49%
Jul. 24
Clear Sky
96 °F
57°F
36 °C
14°C
1mph (1km/h)
south
0in (0mm)
0 %
42%
Jul. 25
Clear Sky
92 °F
54°F
33 °C
12°C
2mph (3km/h)
south
0in (0mm)
0 %
49%
Jul. 26
Few clouds
87 °F
53°F
31 °C
12°C
2mph (3km/h)
south
0in (0mm)
0 %
52%
Jul. 27
Few clouds
89 °F
51°F
32 °C
11°C
0mph (1km/h)
south
0in (0mm)
0 %
53%

Portland weather by month / climate table

Max.

Temperature

°F

ø.

Temperature

°F

Min.

Temperature

(°F)

Precip.

(in)

Rainy Days

(d)

Rel. Humidity

(%)

January

35.8 24.1 12.6 1.7 1 69.8%

February

36 26.1 15.3 1.5 0 67.7%

March

45.7 32.7 21.6 0.1 1 67.8%

April

55 43.2 32.4 0.6 3 67.6%

May

66.2 53.1 42.1 0.6 1 73%

June

74.1 62.1 52 0.4 1 76%

July

77.2 69.3 62.2 0.4 0 75.3%

August

76.5 68.9 61.7 0.6 0 76%

September

73.4 63 54.9 0.2 0 75.9%

October

62.4 51.6 41 0 0 73.2%

November

54.9 41.7 32.7 0.3 0 71.5%

December

43 32 22.5 1.5 1 70.1%

Max.

Temperature

°C

ø.

Temperature

°C

Min.

Temperature

(°C)

Precip.

(mm)

Rainy Days

(d)

Rel. Humidity

(%)

January

2.1 -4.4 -10.8 43.1 1 69.8%

February

2.2 -3.3 -9.3 36.9 0 67.7%

March

7.6 0.4 -5.8 3.8 1 67.8%

April

12.8 6.2 0.2 16.2 3 67.6%

May

19 11.7 5.6 16.4 1 73%

June

23.4 16.7 11.1 9.1 1 76%

July

25.1 20.7 16.8 9 0 75.3%

August

24.7 20.5 16.5 16.4 0 76%

September

23 17.2 12.7 5.6 0 75.9%

October

16.9 10.9 5 0 0 73.2%

November

12.7 5.4 0.4 8 0 71.5%

December

6.1 -0 -5.3 38.3 1 70.1%
October is the driest at 0in / 0mm and January the wettest month with 1.7in / 43.1mm. With an average temperature of 69.3°F / 20.7°C, July is the warmest month in a year. January is the coldest with 24.1°F / -4.4°C average temperature.

Activities & POI in Portland

Type of Activity List
Beach East End Beach
Attraction Portland Discovery Land and Sea Tours, East End Beach, Portland Observatory
Golf Course South Portland Golf Course, Portland Country Club
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