Lake · Sweden
Siljan
Lake in Dalarna, central Sweden
- Area
- 291km²
- Max depth
- 120m
- Average depth
- 26m
- Elevation
- 144m a.s.l.
- Shoreline
- 240km
- Volume
- 7.5km³
Siljan is a lake in Sweden. It covers 291 km². On average it is 26 m deep, and 120 m at its deepest point. Its surface lies 144 m above sea level.
Plan your visit
Stay, sail and get there
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The water
How warm is Siljan?
The water is warmest in July, around 18 °C at the surface, and coldest in February, around 0 °C. It rarely averages 20 °C, but it stays above 17 °C from July to August: brisk, refreshing swimming.
The lake usually freezes over for about 96 days a year, from around 7 January to 12 April.
On the shore, afternoons reach 20 °C on average in July and -4 °C in January. The driest month is February (43 mm of rain), the wettest August (114 mm).
Average surface temperature measured by the Landsat 8 satellite between 2013 and 2021 at the point furthest from the shore (157 readings). Shallow bays and beaches are often warmer.
From above
The whole lake from space
Month by month
The year at the lake, month by month
Not a forecast: these are averages over many years. Water is the 2013–2021 average; air, rain, sun and wind are the 1991–2020 average.
Water: 2013–2021 averageClimate: 1991–2020 average
| Month | Water°C | Water high°C | Air high°C | Air low°C | Rainmm | Rainy daysdays | Sunh/day | Windkm/h |
|---|---|---|---|---|---|---|---|---|
| January | Ice | — | -4 | -10 | 56 | 12 | 1.0 | 8 |
| February | Ice | — | -3 | -9 | 43 | 10 | 3.0 | 8 |
| March | Ice | — | 1 | -6 | 46 | 11 | 6.4 | 8 |
| April | 1 | 4 | 7 | -1 | 47 | 11 | 7.8 | 8 |
| May | 8 | 12 | 13 | 4 | 91 | 15 | 7.3 | 7 |
| June | 15 | 17 | 18 | 9 | 105 | 17 | 8.3 | 7 |
| July | 18 | 19 | 20 | 12 | 111 | 18 | 7.4 | 7 |
| August | 17 | 18 | 18 | 10 | 114 | 18 | 6.1 | 7 |
| September | 13 | 15 | 13 | 6 | 73 | 13 | 4.4 | 8 |
| October | 8 | 10 | 6 | 1 | 78 | 14 | 2.6 | 7 |
| November | 5 | 6 | 1 | -3 | 68 | 14 | 0.9 | 8 |
| December | 2 | 4 | -3 | -8 | 58 | 14 | 0.6 | 8 |
Water: LakeTEMP (Landsat 8, 2013–2021). Air, rain, sun and wind: NASA POWER, 1991–2020 averages. A rainy day has at least 1 mm of rain. Sunshine hours are derived from measured solar radiation.
Size & depth
How big, how deep
- On average, water stays in the lake for about 20 months before flowing out.
- Its catchment drains 12,084 km² of land.
- About 141 m³ of water flow out every second, on average.
- Its shoreline is 4.0 times longer than a circle of the same area: plenty of bays and inlets.
Around the shore
What's around Siljan
Counted within 1.5 km of the shoreline in OpenStreetMap, the map anyone can edit.
- 39beaches and swimming spots
Hundbad, Vikarbybadet, Siljansbadet, Åmåsängsbadet, Tingsnäsbadet and 34 more
- 18campsites
Leksand Camping & Stugby, Vikarbygården, Tällbergs camping, Siljanbadets Camping, Enåbadets Camping and 13 more
- 1boat hire and water-sport clubs
KAYAKOMAT Rättvik
- 21marinas and slipways
Vaverön gäst port, Färnäs båtklubb, Tällbergs Båthamn, Båtklubben Piraten, Sanda Båthamn and 16 more
- 5ferry piers
Långbryggan
- 4viewpoints
Vidablick
- 46hotels, B&Bs and chalets
Fridhemsgatan Hotel, Hotell Kung Gösta, Vålbäckens stugby, Åkerblads Hotell, Moskogen and 41 more
- —fishing spots
- 75restaurants and cafés
Towns on the shore
- Mora12,602 people
- Leksand6,107 people
- Rättvik5,160 people
- Siljansnäs1,274 people
- Vikarbyn1,193 people
Nearest airport with scheduled flights: Mora Airport (MXX), 16 km in a straight line.
Car hire at MXX airport (Mora)Discover Cars · Affiliate linkOpenStreetMap is built by volunteers: when a number is low, it may just mean nobody has mapped it yet.
Recent years
How each month compared
Afternoon high on the shore. The first row is the reference, the 1991–2020 average in °C; the years below show the difference from it: warmer in orange, cooler in blue.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1991–2020 average | -4.4 | -3.4 | 0.7 | 7.4 | 13.3 | 17.5 | 19.9 | 18.1 | 13.3 | 6.2 | 0.8 | -3.1 |
| 2020 | +5.9 | +4.5 | +1.8 | +0.1 | −2.3 | +4.1 | −3.3 | +1.5 | +0.2 | +0.6 | +3.3 | +2.6 |
| 2021 | −3.0 | −2.2 | +1.7 | −1.1 | −1.3 | +3.1 | +2.5 | −1.5 | −0.5 | +2.2 | −0.1 | −2.1 |
| 2022 | +1.4 | +1.7 | +3.1 | −0.3 | −0.1 | +2.3 | −0.9 | +1.6 | −0.9 | +2.6 | +1.7 | −2.8 |
| 2023 | +1.4 | +1.4 | −2.1 | −1.4 | +1.6 | +3.2 | −1.5 | −0.3 | +2.5 | −1.5 | −4.9 | −3.8 |
| 2024 | −1.1 | ±0.0 | +0.3 | −2.4 | +4.9 | +0.6 | −0.9 | +0.5 | +1.6 | +2.2 | +1.3 | +1.9 |
| 2025 | +1.3 | +1.5 | +3.6 | +2.4 | −0.9 | −0.3 | +2.2 | −0.7 | +1.7 | +1.0 | +1.6 | +3.9 |
+1 warmer than usual −1 cooler than usual
About these numbers
| Outline, area, depth, volume | HydroLAKES v1.0 (Messager et al. 2016) · CC BY 4.0 |
|---|---|
| Water temperature and ice | LakeTEMP v1 (Korver et al. 2024), Landsat 8 2013–2021 · CC BY 4.0 |
| Air, rain, sun, wind | NASA POWER, 1991–2020 · public domain |
| Names and description | Wikidata (Q217430) · CC0 |
| Around the shore | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
Every figure is an average or a count from a public dataset. Licences and methods: data sources.
