Portland Water Temperature

Portland is a city close to Gulf of Maine. Warm-summer humid continental climate would be the climate here. 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. 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. October is the month with the min. precipitation of 0in / 0mm and January with the max. precipitation in a year with 1.7in / 43.1mm. June, July, August, September would be the best time to visit this place.

Portland Summary

Description Value
Current water temperature / 10 °C
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

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
The warmest water temperature are in August with around 63.5°F / 17.5°C. The coldest in March with an average water temperature of 37.2°F / 2.9°C.

Portland weather today & 14-day weather forecast

Date
Weather
Max. F
Min. F
Max. C
Min. C
Windspeed
Windir.
Precip.
Rainrisk
Rel. Humidity
Jan. 14
Scattered clouds
49 °F
37°F
9 °C
3°C
3mph (4km/h)
east
0in (0mm)
20 %
87%
Jan. 15
Overcast clouds
50 °F
42°F
10 °C
5°C
1mph (2km/h)
east-southeast
0in (3mm)
70 %
94%
Jan. 16
Overcast clouds
43 °F
37°F
6 °C
3°C
1mph (2km/h)
south-southeast
0in (1mm)
50 %
98%
Jan. 17
Light shower rain
52 °F
41°F
11 °C
5°C
1mph (2km/h)
southwest
0in (3mm)
75 %
75%
Jan. 18
Overcast clouds
48 °F
39°F
9 °C
4°C
1mph (1km/h)
south
0in (0mm)
0 %
73%
Jan. 19
Broken clouds
43 °F
36°F
6 °C
2°C
1mph (1km/h)
east
0in (0mm)
0 %
72%
Jan. 20
Overcast clouds
42 °F
36°F
6 °C
2°C
1mph (1km/h)
south
0in (2mm)
60 %
79%
Date
Weather
Max. F
Min. F
Max. C
Min. C
Windspeed
Windir.
Precip.
Rainrisk
Rel. Humidity
Jan. 21
Light rain
40 °F
36°F
5 °C
2°C
2mph (3km/h)
southwest
0in (5mm)
85 %
77%
Jan. 22
Broken clouds
38 °F
32°F
4 °C
0°C
1mph (1km/h)
south
0in (1mm)
60 %
76%
Jan. 23
Few clouds
39 °F
29°F
4 °C
-2°C
1mph (1km/h)
east
0in (0mm)
0 %
55%
Jan. 24
Snow
39 °F
27°F
4 °C
-3°C
2mph (3km/h)
east-northeast
0in (3mm)
75 %
71%
Jan. 25
Light rain
40 °F
28°F
5 °C
-2°C
1mph (2km/h)
east-northeast
0in (7mm)
90 %
97%
Jan. 26
Light shower rain
39 °F
33°F
4 °C
1°C
1mph (2km/h)
east-southeast
0in (5mm)
80 %
99%
Jan. 27
Light shower rain
41 °F
39°F
5 °C
4°C
1mph (2km/h)
south-southwest
0in (5mm)
85 %
84%
Jan. 28
Moderate rain
40 °F
37°F
5 °C
3°C
4mph (6km/h)
south-southwest
0in (11mm)
90 %
92%
Jan. 29
Overcast clouds
43 °F
38°F
6 °C
4°C
1mph (2km/h)
south
0in (2mm)
65 %
83%

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%
The warmest avg. 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. October is the month with the min. precipitation of 0in / 0mm and January with the max. precipitation in a year with 1.7in / 43.1mm.

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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