The archipelago, consisting of two small islands, is located in the North Sea, about 50 km (30 mi) north of the German coast.
The temperature range between night and day is reduced, and the minimum temperature exceeds freezing even in winter.
is not very cold for the latitude, it is often humid, windy and rainy. There may be relatively mild periods, when Atlantic currents prevail, and other colder periods, when the temperature drops below freezing and it can snow. Because of the influence of the sea, temperatures drop below freezing less often than in the rest of Germany. On the coldest days of the year, the temperature typically reaches -4/-5 °C (23/25 °F).
, in which the temperature can drop as low as -7 °C (19 °F) or below. In fact, Scandinavian high pressure systems can reverse the normal circulation and bring very cold periods, which in the past were more frequent. The cold record is -11 °C (12 °F), set in February 1956.
In spring, temperatures slowly rise. In May, and sometimes even in early June, there can still be cold and unstable weather.
, the weather is variable, with fairly frequent rains, perhaps alternating with bright spells. There can be cool days, with highs of 15/17 °C and a moderate or strong wind. However, there are also mild or pleasantly warm periods.
On the warmest days of the year, the temperature typically reaches 25 °C (77 °F). The record is 28.5 °C (83.5 °F), set in July 1994.
to visit Heligoland runs from June to August, since it is the warmest and sunniest period of the year. However, it can be useful to bring a sweatshirt or sweater and a light jacket.
. Here are the average temperatures.
January is generally a cold month. The average temperature is of
3.7 °C, with a minimum of
2.3 °C and a maximum of
5.1 °C.
On the coldest nights of the month, the temperature usually drops to around
-3 °C. However, it dropped to
-6.6 °C in January 2014.
On the warmest days of the month, the temperature usually reaches around
8.5 °C. However, it reached
11.1 °C in January 2007.
Precipitation amounts to
65 mm, distributed over 13 days.
The day lasts on average 8 hours and 0 minutes.
There are on average 1.5 hours of sunshine per day. So, the sun shines 20% of the time.
The average wind speed is of
31.6 kph.
The average sea temperature is of
5.5 °C. Therefore, the sea is very cold for swimming.
February, the coldest month of the year, is generally a cold month. The average temperature is of
3.2 °C, with a minimum of
1.9 °C and a maximum of
4.6 °C.
On the coldest nights of the month, the temperature usually drops to around
-2.5 °C. However, it dropped to
-8.6 °C in February 1996.
On the warmest days of the month, the temperature usually reaches around
7.5 °C. However, it reached
10.7 °C in February 2020.
Precipitation amounts to
45 mm, distributed over 10 days.
The day lasts on average 9 hours and 50 minutes.
There are on average 2.5 hours of sunshine per day. So, the sun shines 27% of the time.
The average wind speed is of
29.1 kph.
The average sea temperature is of
4.5 °C. Therefore, the sea is very cold for swimming.
March is generally a quite cold month. The average temperature is of
4.7 °C, with a minimum of
3.2 °C and a maximum of
6.2 °C.
On the coldest nights of the month, the temperature usually drops to around
-0.5 °C. However, it dropped to
-5.9 °C in March 2018.
On the warmest days of the month, the temperature usually reaches around
10 °C. However, it reached
12.8 °C in March 2010.
Precipitation amounts to
40 mm, distributed over 9 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 4.5 hours of sunshine per day. So, the sun shines 37% of the time.
The average wind speed is of
26.6 kph.
The average sea temperature is of
4.9 °C. Therefore, the sea is very cold for swimming.
April is generally a quite mild month. The average temperature is of
7.8 °C, with a minimum of
5.9 °C and a maximum of
9.7 °C.
On the coldest nights of the month, the temperature usually drops to around
2 °C. However, it dropped to
-1.3 °C in April 1996.
On the warmest days of the month, the temperature usually reaches around
15 °C. However, it reached
19.6 °C in April 1993.
Precipitation amounts to
35 mm, distributed over 8 days.
The day lasts on average 14 hours and 10 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 48% of the time.
The average wind speed is of
22.4 kph.
The average sea temperature is of
7.1 °C. Therefore, the sea is very cold for swimming.
May is generally a mild month. The average temperature is of
11.4 °C, with a minimum of
9.4 °C and a maximum of
13.5 °C.
On the coldest nights of the month, the temperature usually drops to around
6 °C. However, it dropped to
2.3 °C in May 1997.
On the warmest days of the month, the temperature usually reaches around
19 °C. However, it reached
23.9 °C in May 2000.
Precipitation amounts to
40 mm, distributed over 8 days.
The day lasts on average 16 hours and 5 minutes. So the days are long.
There are on average 8 hours of sunshine per day. So, the sun shines 51% of the time.
The average wind speed is of
21.1 kph.
The average sea temperature is of
10.7 °C. Therefore, the sea is very cold for swimming.
June is generally a very mild month. The average temperature is of
14.6 °C, with a minimum of
12.6 °C and a maximum of
16.6 °C.
On the coldest nights of the month, the temperature usually drops to around
9.5 °C. However, it dropped to
7.2 °C in June 1991.
On the warmest days of the month, the temperature usually reaches around
22.5 °C. However, it reached
25.6 °C in June 1992.
Precipitation amounts to
55 mm, distributed over 9 days.
The day lasts on average 17 hours and 5 minutes. So the days are very long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 8 hours of sunshine per day. So, the sun shines 46% of the time.
The average wind speed is of
21.4 kph.
The average sea temperature is of
14.3 °C. Therefore, the sea is very cold for swimming.
July is generally a very mild month. The average temperature is of
17.4 °C, with a minimum of
15.4 °C and a maximum of
19.3 °C.
On the coldest nights of the month, the temperature usually drops to around
12.5 °C. However, it dropped to
10.6 °C in July 1996.
On the warmest days of the month, the temperature usually reaches around
24 °C. However, it reached
28.7 °C in July 1994.
Precipitation amounts to
70 mm, distributed over 10 days.
The day lasts on average 16 hours and 30 minutes. So the days are long.
There are on average 8 hours of sunshine per day. So, the sun shines 49% of the time.
The average wind speed is of
21.6 kph.
The average sea temperature is of
16.9 °C. Therefore, the sea is cold for swimming.
August, the warmest month of the year, is generally a very mild month. The average temperature is of
18 °C, with a minimum of
16.1 °C and a maximum of
19.9 °C.
On the coldest nights of the month, the temperature usually drops to around
12.5 °C. However, it dropped to
9.9 °C in August 2009.
On the warmest days of the month, the temperature usually reaches around
24 °C. However, it reached
28 °C in August 2003.
Precipitation amounts to
90 mm, distributed over 11 days.
The day lasts on average 14 hours and 40 minutes. So the days are long.
There are on average 7 hours of sunshine per day. So, the sun shines 49% of the time.
The average wind speed is of
22.7 kph.
The average sea temperature is of
18 °C. Therefore, the sea is cold for swimming.
September is generally a very mild month. The average temperature is of
15.8 °C, with a minimum of
14.1 °C and a maximum of
17.4 °C.
On the coldest nights of the month, the temperature usually drops to around
10.5 °C. However, it dropped to
7 °C in September 1995.
On the warmest days of the month, the temperature usually reaches around
20.5 °C. However, it reached
24.4 °C in September 2016.
Precipitation amounts to
90 mm, distributed over 11 days.
The day lasts on average 12 hours and 35 minutes.
There are on average 5 hours of sunshine per day. So, the sun shines 41% of the time.
The average wind speed is of
25.9 kph.
The average sea temperature is of
16.6 °C. Therefore, the sea is cold for swimming.
October is generally a mild month. The average temperature is of
12 °C, with a minimum of
10.5 °C and a maximum of
13.5 °C.
On the coldest nights of the month, the temperature usually drops to around
6 °C. However, it dropped to
1.5 °C in October 2003.
On the warmest days of the month, the temperature usually reaches around
17 °C. However, it reached
19.4 °C in October 2018.
Precipitation amounts to
85 mm, distributed over 13 days.
The day lasts on average 10 hours and 25 minutes.
There are on average 3.5 hours of sunshine per day. So, the sun shines 33% of the time.
The average wind speed is of
28.8 kph.
The average sea temperature is of
14.1 °C. Therefore, the sea is very cold for swimming.
November is generally a quite mild month. The average temperature is of
8 °C, with a minimum of
6.6 °C and a maximum of
9.5 °C.
On the coldest nights of the month, the temperature usually drops to around
1.5 °C. However, it dropped to
-4 °C in November 1993.
On the warmest days of the month, the temperature usually reaches around
13.5 °C. However, it reached
16.7 °C in November 2020.
Precipitation amounts to
75 mm, distributed over 14 days.
The day lasts on average 8 hours and 30 minutes.
There are on average 1.5 hours of sunshine per day. So, the sun shines 20% of the time.
The average wind speed is of
30.5 kph.
The average sea temperature is of
10.9 °C. Therefore, the sea is very cold for swimming.
December is generally a quite cold month. The average temperature is of
5.2 °C, with a minimum of
3.7 °C and a maximum of
6.7 °C.
On the coldest nights of the month, the temperature usually drops to around
-1 °C. However, it dropped to
-6.2 °C in December 1997.
On the warmest days of the month, the temperature usually reaches around
10.5 °C. However, it reached
12.9 °C in December 2006.
Precipitation amounts to
75 mm, distributed over 14 days.
The day lasts on average 7 hours and 25 minutes. So the days are short. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There is an average of 1 hour of sunshine per day. So, the sun shines 16% of the time.
The average wind speed is of
31.1 kph.
The average sea temperature is of
7.8 °C. Therefore, the sea is very cold for swimming.