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Warmest sea in Germany in September

147 coastal locations in Germany ranked by their typical September sea temperature. Region-wide average in September: 18.0°C. The top of the list is where to find the warmest swimming this month.

Warmest in September

Constance

24.2°C September mean in Germany

Regional September average

18.0°C

across all 147 coastal locations in Germany

Vs annual mean

+6.3°C

above the year-round regional average

What the Germany sea feels like in September

At this temperature, water will feel cold compared to a swimming pool, but with a bit of experience and practice most people will find the water relatively comfortable to swim in.

Germany monthly average 4.3°C to 20.0°C
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  • Warmest month August 20.0°C
  • Coldest month February 4.3°C
  • Annual mean 11.8°C
  • Months above 20°C 1 of 12

Where September fits in the year

September sits inside the regional pattern shown on the left. Pick a different month to see how the ranking shifts.

All twelve Germany month rankings:

Germany sea temperature map (live)

The map shows today's latest reading at every Germany location. The list below is based on the typical September mean, useful for trip planning weeks or months ahead.

Zoom in to see individual locations. Click a pin for water temperatures. View list →
°C -2 0 1 3 5 7 9 11 13 15 17 19 21 24 27 30 35

Top 50 warmest Germany locations in September

Sorted by the typical September mean built from a decade of daily readings at each location. Click any place for its 30-day chart, monthly profile, and full 10-year history.

# Location September mean
1 Constance 24.2°C
2 Mainau 24.2°C
3 Uhldingen-Muhlhofen 24.2°C
4 Titisee 24.1°C
5 Forggensee 23.7°C
6 Friedrichshafen 23.7°C
7 Hagnau am Bodensee 23.7°C
8 Immenstaad am Bodensee 23.7°C
9 Lindau 23.7°C
10 Meersburg 23.7°C
11 Stuttgart 23.7°C
12 Uberlingen 23.7°C
13 Konigssee 23.7°C
14 Munich 23.7°C
15 Prien am Chiemsee 23.7°C
16 Starnberg 23.7°C
17 Walchensee 23.7°C
18 Borkum 18.0°C
19 Juist 18.0°C
20 Norderney 18.0°C
21 Emden 17.9°C
22 Baltrum 17.9°C
23 East Frisian Islands 17.9°C
24 Langeoog 17.9°C
25 Neuharlingersiel 17.9°C
Show 25 more ▸
26 Heligoland Schleswig-Holstein 17.8°C
27 Frankfurt am Main 17.8°C
28 Neuenkirchen 17.8°C
29 Wangerooge 17.7°C
30 Hooksiel 17.7°C
31 Schillig 17.7°C
32 Wilhelmshaven 17.7°C
33 Helgoland 17.6°C
34 Oldenburg 17.6°C
35 Varel 17.6°C
36 Altwarp 17.6°C
37 Lassan 17.6°C
38 Monkebude 17.6°C
39 Ueckermunde 17.6°C
40 Weissensee 17.6°C
41 Greifswald 17.6°C
42 Trassenheide Mecklenburg-Vorpommern 17.6°C
43 Ahlbeck 17.6°C
44 Grambin 17.6°C
45 Heringsdorf 17.6°C
46 Kamminke 17.6°C
47 Seebad Bansin 17.6°C
48 Usedom 17.6°C
49 Nordenham 17.6°C
50 Karlshagen 17.5°C

Coldest 10 in Germany in September

Same data the other way. Helpful if you want to know which Germany coasts to avoid for swimming in September.

# Location September mean
1 Markgrafenheide 16.6°C
2 Rostock 16.6°C
3 Warnemunde 16.6°C
4 Ostseebad Dierhagen 16.7°C
5 Ribnitz Damgarten 16.7°C
6 Barth 16.7°C
7 Born 16.7°C
8 Fuhlendorf 16.7°C
9 Prerow 16.7°C
10 Pruchten 16.7°C

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