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Germany GermanyIsland

Ummanz

19.2 km² of land in the Baltic Sea.

When to go

Ummanz seen from space, cut out from the sea (Sentinel-2)
N 1 km

Satellite: Sentinel-2 cloudless 2016 by EOX (CC BY 4.0). Outline and points © OpenStreetMap contributors / Natural Earth. North up.

In numbers

19.2km²

Area

27km

Coastline

3m

Highest point

274

People

18°C

Warmest sea

August

10km

To the mainland

When to go to Ummanz

Best to visit from July to August.

The sea is warmest in August (18 °C) and coolest in February (2 °C). The water never reaches 21 °C: bring a wetsuit.

Sea temperature (the water level) Air: night low to afternoon high Wet days Best months

Averages 1991–2020. Sea: NOAA OISST, the water within 35 km of the coast. Air, rain and sun: NASA POWER. Best months weigh warm afternoons (23–30 °C), sea of 24 °C or more and few wet days.

Island of Germany

Ummanz is an island in Germany. It covers 19.2 km², with 27 km of coastline. Its highest point rises to 3 m. About 274 people live on it. The nearest mainland is 10 km away.

Read more on Wikipedia

Getting there

Plan the trip

Ferries, stays and things to do

Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.

On the island

What you find on Ummanz.

  • 1viewpointsHiddenseesblick
  • 1campsitesRegenbogencamp Suhrendorf
  • 10hotels, guesthouses and apartments
  • 4restaurants, cafés and bars

Counted in OpenStreetMap, the map anyone can edit, inside the island's outline. A low number may only mean nobody has mapped it yet.

The shape of the land.

On average the island stands 3 m above the sea. 100 % of it is below 200 m.

  • 100 %0–50 m

Share of the island's area in each altitude band, from the Copernicus DEM (30 m, read at 30–240 m on large islands).

Size, for real

Next to islands you may know.

Ummanz19 km²
Manhattan54 km²
Santorini76 km²

5 km

All outlines drawn to the same scale (Natural Earth and OpenStreetMap).

Month by month

The weather on the island.

JanFebMarAprMayJunJulAugSepOctNovDec
Afternoon high (°C)335914182020171284
Night low (°C)0015913161613952
Sea (°C)323610141718161296
Rain (mm)604542344657747257625762
Wet days13111081012131412131314
Sun h/day0.41.74.16.98.18.57.66.55.32.70.70.1
Wind (km/h)272523201919191922242426

Averages 1991–2020 for the ~55 km NASA POWER cell over the island; the sea from NOAA OISST.

Recent years

Warmer and cooler years at sea.

Each month's sea temperature compared with its 1991–2020 average, in degrees.

JanFebMarAprMayJunJulAugSepOctNovDec
2020+2.0+2.7+2.5+2.0+0.7+1.0−0.3+1.1+1.3+1.8+2.2+1.7
2021+1.5+0.2+0.3−0.1−0.9+2.2+2.1−0.1+0.6+0.7+1.2+0.6
2022+0.7+1.6+1.7+0.9+1.7+1.4+0.2+1.4+0.3+0.7+1.8+0.7
2023+1.5+1.5+1.2+0.3+0.4+2.0+0.7−0.6+1.6+1.2+0.8±0.0
2024+0.1+1.3+1.4+1.1+1.3+1.5+0.6+0.9+1.7+0.8+1.1+1.2
2025+1.4+1.0+1.3+2.1+1.7+0.6+0.6+0.2+1.2+0.6+0.8+0.9

+1 warmer than usual −1 cooler than usual

Photos

Seen by visitors.

St Marien Waase Ummanz
Karl-Heinz Meurer (-- Charlie1965nrw ). · CC BY-SA 3.0
Ummanz-Brücke-0707e043
Chron-Paul · CC BY-SA 3.0
Ummanz-Mursewiek (1)
Assenmacher · CC BY-SA 4.0
Ummanz-Mursewiek (2)
Assenmacher · CC BY-SA 4.0

About these numbers

Names, area, populationWikidata (Q706702) · CC0
Outline© OpenStreetMap contributors · ODbL
Sea temperatureNOAA OISST v2.1 · 1991–2020
ClimateNASA POWER · 1991–2020
Relief, 3D modelCopernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA
Beaches, ports, lighthouses, trails© OpenStreetMap contributors · ODbL
TownsGeoNames · CC BY 4.0
ImagesEOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons

Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.

The family

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