Deer Isle Water Temperature

Deer Isle is a village close to Gulf of Maine. August is the month with the hottest water temperature at 58.3°F / 14.6°C. The coldest month is March with an ø water temperature of 36°F / 2.2°C. September is the month with the lowest precipitation of 0.1in / 3.3mm and January with the highest precipitation in a year with 3.2in / 82mm. The avg. air temperature is around 64.9°F / 18.3°C, August is the month with the highest temperature. January is the coolest with 23.4°F / -4.8°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.

Deer Isle Summary

Description Value
Current water temperature 44.6 °F / 7 °C
Warmest Month Water Temperature: August with 58.3°F / 14.6°C
Coldest Month Water Temperature: March with 36°F / 2.2°C
Warmest Month Air Temperature: August with 64.9°F / 18.3°C
Coldest Month Air Temperature: January with 23.4°F / -4.8°C
Wettest Month: January with 3.2in / 82mm
Driest Month: September with 0.1in / 3.3mm
Highest Humidity July with 81.7%
Lowest Humidity March with 68.9%
Best Time to Visit: June, July, August, September
Climate Classification Warm-summer humid continental climate

Deer Isle water temperature by month

Gulf of Maine water temperature by month

Max. Water

Temperature (°F)

ø. Water

Temperature (°F)

Min. Water

Temperature (°F)

January

41.7 39.6 37.6

February

37.6 36.7 36

March

36.9 36.1 35.6

April

41.9 39 36.9

May

48.7 45.1 41.9

June

53.8 51.1 48.6

July

58.1 56.3 53.8

August

58.6 58.1 57.6

September

58.5 56.8 55.6

October

55.4 53.2 51.3

November

51.3 49.1 46.4

December

46.6 44.2 41.9

Gulf of Maine water temperature by month

Max. Water

Temperature (°C)

ø. Water

Temperature (°C)

Min. Water

Temperature (°C)

January

5.4 4.2 3.1

February

3.1 2.6 2.2

March

2.7 2.3 2

April

5.5 3.9 2.7

May

9.3 7.3 5.5

June

12.1 10.6 9.2

July

14.5 13.5 12.1

August

14.8 14.5 14.2

September

14.7 13.8 13.1

October

13 11.8 10.7

November

10.7 9.5 8

December

8.1 6.8 5.5
The hottest water temperature typically reached in August with around 58.3°F / 14.6°C. The coldest in March with an average water temperature of 36°F / 2.2°C.

Deer Isle weather today & 14-day weather forecast

Date
Weather
Max. F
Min. F
Max. C
Min. C
Windspeed
Windir.
Precip.
Rainrisk
Rel. Humidity
Jan. 14
Overcast clouds
37 °F
34°F
3 °C
1°C
1mph (2km/h)
west-northwest
0in (0mm)
0 %
73%
Jan. 15
Scattered clouds
38 °F
28°F
3 °C
-2°C
2mph (4km/h)
south
0in (0mm)
0 %
78%
Jan. 16
Heavy rain
44 °F
35°F
7 °C
2°C
6mph (10km/h)
east-southeast
1in (28mm)
95 %
96%
Jan. 17
Overcast clouds
40 °F
34°F
5 °C
1°C
6mph (9km/h)
west-southwest
0in (0mm)
35 %
77%
Jan. 18
Broken clouds
35 °F
26°F
2 °C
-3°C
4mph (7km/h)
west
0in (0mm)
10 %
66%
Jan. 19
Broken clouds
35 °F
22°F
2 °C
-5°C
7mph (11km/h)
west-northwest
0in (0mm)
0 %
59%
Jan. 20
Light snow
27 °F
22°F
-3 °C
-5°C
4mph (6km/h)
west
0in (5mm)
90 %
83%
Date
Weather
Max. F
Min. F
Max. C
Min. C
Windspeed
Windir.
Precip.
Rainrisk
Rel. Humidity
Jan. 21
Overcast clouds
33 °F
17°F
1 °C
-9°C
2mph (4km/h)
west-northwest
0in (0mm)
0 %
64%
Jan. 22
Broken clouds
32 °F
28°F
-0 °C
-2°C
2mph (3km/h)
west-northwest
0in (0mm)
0 %
62%
Jan. 23
Few clouds
25 °F
19°F
-4 °C
-7°C
5mph (8km/h)
north-northwest
0in (0mm)
0 %
59%
Jan. 24
Few clouds
14 °F
17°F
-10 °C
-8°C
3mph (5km/h)
northwest
0in (0mm)
0 %
60%
Jan. 25
Overcast clouds
15 °F
10°F
-10 °C
-12°C
4mph (7km/h)
south-southeast
0in (2mm)
65 %
70%
Jan. 26
Scattered clouds
16 °F
7°F
-9 °C
-14°C
3mph (5km/h)
northwest
0in (0mm)
0 %
58%
Jan. 27
Overcast clouds
8 °F
2°F
-13 °C
-17°C
5mph (8km/h)
north-northwest
0in (0mm)
20 %
73%
Jan. 28
Overcast clouds
15 °F
6°F
-10 °C
-15°C
2mph (4km/h)
south
0in (0mm)
10 %
72%
Jan. 29
Light snow
16 °F
8°F
-9 °C
-13°C
6mph (9km/h)
south-southeast
0in (0mm)
40 %
78%

Deer Isle weather by month / climate table

Max.

Temperature

°F

ø.

Temperature

°F

Min.

Temperature

(°F)

Precip.

(in)

Rainy Days

(d)

Rel. Humidity

(%)

January

34.7 23.4 11.8 3.2 2 71%

February

34.2 25.2 14.9 1.5 0 68.9%

March

43 31.6 21 0.7 3 68.9%

April

51.1 41.2 32 1.2 3 70.5%

May

60.4 50.4 40.8 0.9 1 76.2%

June

67.3 58.3 50.2 0.2 1 80%

July

70.7 64.6 58.1 0.8 1 81.7%

August

70.9 64.9 59.5 0.7 0 81.3%

September

69.6 60.4 53.8 0.1 0 78.9%

October

60.1 50.7 40.5 0.4 0 73.9%

November

53.1 41.2 32.4 0.4 1 72.3%

December

42.1 31.1 21.4 2.2 1 71.1%

Max.

Temperature

°C

ø.

Temperature

°C

Min.

Temperature

(°C)

Precip.

(mm)

Rainy Days

(d)

Rel. Humidity

(%)

January

1.5 -4.8 -11.2 82 2 71%

February

1.2 -3.8 -9.5 39.3 0 68.9%

March

6.1 -0.2 -6.1 18.3 3 68.9%

April

10.6 5.1 0 30.8 3 70.5%

May

15.8 10.2 4.9 22.4 1 76.2%

June

19.6 14.6 10.1 4.8 1 80%

July

21.5 18.1 14.5 20 1 81.7%

August

21.6 18.3 15.3 17.2 0 81.3%

September

20.9 15.8 12.1 3.3 0 78.9%

October

15.6 10.4 4.7 9.8 0 73.9%

November

11.7 5.1 0.2 11 1 72.3%

December

5.6 -0.5 -5.9 55.4 1 71.1%
September is the driest at 0.1in / 3.3mm and January the wettest month with 3.2in / 82mm. With an average temperature of 64.9°F / 18.3°C, August is the warmest month in a year. January is the coldest with 23.4°F / -4.8°C average temperature.

Activities & POI in Deer Isle

Type of Activity List
Beach The Brook Beach, Lighthouse Beach, Orchard Beach, Lily Pond Beach, Causeway Beach
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