Denmark
Satellite: Sentinel-2 cloudless 2016 by EOX (CC BY 4.0). Outline and points © OpenStreetMap contributors / Natural Earth. North up.
In numbers
293km²
Area
142km
Coastline
77m
Highest point
Høgebjerg
49,976
People
18°C
Warmest sea
August
When to go to Als
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.
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.
Danish island in the Baltic Sea
Als is an island in Denmark. It covers 293 km², with 142 km of coastline. Its highest point, Høgebjerg, rises to 77 m. About 49,976 people live on it.
Getting there
- Sønderborg Airport (SGD)airport on the island, with scheduled flightsCar hire at BLL airport (Billund)Discover Cars · Affiliate link↗
- FerriesAlslinjen, Nordalsfærgen Bitten, Søby - Fynshav, Langballigau - Sønderborg
- From July to Augustbest months to go (from 30 years of averages)
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 Als.
- 18beachesDen Sorte Strand, Den gule strand, Dybbøl Strand and 15 more
- 12viewpointsElsbjerg, Alsik PoV, Støvlen and 9 more
- 4lighthousesNordborg Fyr, Gammel Pøl Fyr, Tranerodde Fyr and 1 more
- 4ferry terminalsFynshav and 3 more
- 14marinasBrandsbøl Havn, Ulkebøl Krigshavn, Augustenborg Yachthavn and 11 more
- 3castles and fortsNordborg Castle, Augustenborg Slot, Sønderborg Slot
- 277ruins and archaeological sitesGyngestenen, Vikingehustomt Vollerup-huset and 275 more
- 24waymarked walking routesEuropean long distance path E6 - part Denmark, Alssundstien, Alsstien and 21 more
- 39campsitesArnkil - Primitiv Teltplads, Augustenborg Skov Shelter- og Teltplads, Blommeskobbel fri teltplads and 36 more
- 213hotels, guesthouses and apartments
- 73restaurants, 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.
Cross-checked with our atlases
Als in our other atlases
Everything Coastya, Peakyas, Lakeyas and Cascadyas know about what lies inside Als, each with its own numbers.
5beaches and covesCoastya
3mountainsPeakyas
1lakeLakeyas
Highest point
81m
Høgebjerg
according to Peakyas
Largest lake
0.34km²
Nordborg Sø
according to Lakeyas
Warmest lake
21.9°C
Nordborg Sø
surface water, warmest month · according to Lakeyas
Beach with the warmest sea
18.5°C
Fynshav strand
sea in the warmest month · according to Coastya
5 beaches
on Coastya, the beach atlas
- Taksensand18.5°C
- Købingsmark Strand18.5°C
- Lavensby Strand18.5°C
- Fynshav strand18.5°C
- Dyvigcove18.5°C
1 lakes
on Lakeyas, the lake atlas
- Nordborg Sø0.34km²
Lakeyas is coming soonOpen Lakeyas ↗
The shape of the land.
On average the island stands 22 m above the sea. 100 % of it is below 200 m.
- 95 %0–50 m
- 5 %50–200 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.
20 km
All outlines drawn to the same scale (Natural Earth and OpenStreetMap).
Towns on the island
- Sønderborg27,766 people
- Nordborg5,661 people
- Augustenborg3,164 people
- Høruphav2,740 people
- Guderup2,406 people
Month by month
The weather on the island.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Afternoon high (°C) | 3 | 3 | 6 | 10 | 15 | 18 | 21 | 20 | 17 | 13 | 8 | 4 |
| Night low (°C) | 0 | -1 | 1 | 4 | 8 | 12 | 14 | 15 | 12 | 8 | 5 | 1 |
| Sea (°C) | 3 | 2 | 3 | 5 | 11 | 15 | 18 | 18 | 16 | 12 | 9 | 4 |
| Rain (mm) | 63 | 51 | 46 | 36 | 50 | 69 | 76 | 82 | 60 | 69 | 63 | 65 |
| Wet days | 14 | 11 | 11 | 8 | 10 | 12 | 13 | 14 | 12 | 14 | 14 | 14 |
| Sun h/day | 0.4 | 1.7 | 4.7 | 7.2 | 8.3 | 8.6 | 7.9 | 6.7 | 5.5 | 2.9 | 0.8 | 0.1 |
| Wind (km/h) | 24 | 23 | 22 | 19 | 19 | 19 | 18 | 18 | 20 | 22 | 23 | 23 |
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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | +3.0 | +3.4 | +2.9 | +3.7 | +0.7 | +1.3 | ±0.0 | +1.2 | +1.5 | +1.3 | +1.8 | +2.3 |
| 2021 | +1.8 | +0.2 | +0.9 | +1.6 | −0.7 | +1.4 | +2.7 | −0.1 | +0.8 | +1.1 | +1.4 | +2.2 |
| 2022 | +1.9 | +2.8 | +2.5 | +3.1 | +1.4 | +0.2 | −0.4 | +1.1 | +0.9 | +1.1 | +2.0 | +2.0 |
| 2023 | +3.2 | +2.1 | +2.0 | +2.7 | +0.1 | +1.4 | −0.5 | −0.9 | +2.2 | +1.7 | +0.9 | +1.2 |
| 2024 | +0.9 | +2.1 | +2.2 | +2.9 | +2.3 | +0.5 | +0.2 | +0.6 | +1.6 | +1.0 | +1.3 | +2.6 |
| 2025 | +2.4 | +1.3 | +1.9 | +4.1 | +2.0 | −0.1 | +0.7 | −0.2 | +1.1 | +0.9 | +1.2 | +2.6 |
+1 warmer than usual −1 cooler than usual
Photos
Seen by visitors.
Germany
About these numbers
| Names, area, population | Wikidata (Q165383) · CC0 |
|---|---|
| Outline | © OpenStreetMap contributors · ODbL |
| Sea temperature | NOAA OISST v2.1 · 1991–2020 |
| Climate | NASA POWER · 1991–2020 |
| Relief, 3D model | Copernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA |
| Beaches, ports, lighthouses, trails | © OpenStreetMap contributors · ODbL |
| Towns | GeoNames · CC BY 4.0 |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Beaches, mountains, lakes and waterfalls | Coastya, Peakyas, Lakeyas — Wikidata · CC0; © OpenStreetMap contributors · ODbL; GeoNames · CC BY 4.0; NOAA OISST; HydroLAKES (Messager et al. 2016) · CC BY 4.0, LakeTEMP (Korver et al. 2024) · CC BY 4.0 |
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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