Lake · Sweden
Sommen
Lake in Sweden
- Area
- 129km²
- Max depth
- 53m
- Average depth
- 37m
- Elevation
- 146m a.s.l.
- Shoreline
- 316km
- Volume
- 4.8km³
Sommen is a lake in Sweden. It covers 129 km². On average it is 37 m deep, and 53 m at its deepest point. Its surface lies 146 m above sea level.
Plan your visit
Stay, sail and get there
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The water
How warm is Sommen?
The water is warmest in July, around 20 °C at the surface, and coldest in February, around 0 °C. The surface averages 20 °C or more in July: comfortable for most swimmers.
The lake usually freezes over for about 24 days a year, from around 7 February to 2 March.
On the shore, afternoons reach 21 °C on average in July and -1 °C in January. The driest month is March (40 mm of rain), the wettest July (108 mm).
Average surface temperature measured by the Landsat 8 satellite between 2013 and 2021 at the point furthest from the shore (107 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 | 1 | 2 | -1 | -6 | 47 | 12 | 0.4 | 10 |
| February | Ice | — | 0 | -6 | 42 | 11 | 1.9 | 10 |
| March | 1 | 2 | 4 | -3 | 40 | 11 | 5.0 | 10 |
| April | 5 | 8 | 10 | 2 | 40 | 10 | 7.2 | 10 |
| May | 11 | 15 | 15 | 7 | 71 | 14 | 8.4 | 10 |
| June | 17 | 19 | 19 | 11 | 94 | 16 | 9.3 | 10 |
| July | 20 | 20 | 21 | 13 | 108 | 16 | 8.1 | 9 |
| August | 19 | 20 | 20 | 12 | 97 | 17 | 6.7 | 9 |
| September | 15 | 17 | 16 | 9 | 61 | 13 | 5.1 | 10 |
| October | 11 | 13 | 9 | 4 | 70 | 14 | 2.6 | 10 |
| November | 7 | 9 | 4 | 0 | 63 | 14 | 0.7 | 10 |
| December | 4 | 5 | 0 | -4 | 55 | 14 | 0.2 | 10 |
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 14 years before flowing out.
- Its catchment drains 1,893 km² of land.
- About 11 m³ of water flow out every second, on average.
- Its shoreline is 7.8 times longer than a circle of the same area: plenty of bays and inlets.
Around the shore
What's around Sommen
Counted within 1.5 km of the shoreline in OpenStreetMap, the map anyone can edit.
- 17beaches and swimming spots
Sommens Badplats, Hättebaden, Torpön badplats, Norra Vi Badplats and 13 more
- 5campsites
Sommens camping, Hätte Camping, Torpöns Camping, Malexanders Camping
- 1boat hire and water-sport clubs
Petruskajak
- 9marinas and slipways
Blåvik småbåtshamn, Sommens Ångbåtsbrygga, Norra Vi Båthamn, Gästhamn and 5 more
- 2ferry piers
Torpön, Blåvik
- 9viewpoints
Korpberget, Röaberget, Börshults Utsiktsplats and 6 more
- 2hotels, B&Bs and chalets
Solvikens Vandrarhem & Konferens, Malexander Pub & Pensionat
- —fishing spots
- 7restaurants and cafés
Towns on the shore
- Tranås14,550 people
Nearest airport with scheduled flights: Linköping City Airport (LPI), 51 km in a straight line.
Car hire at LPI airport (Linköping)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 | -1.3 | -0.3 | 3.6 | 10.0 | 15.4 | 19.1 | 21.4 | 20.1 | 15.7 | 9.2 | 3.9 | 0.3 |
| 2020 | +5.6 | +3.8 | +1.5 | +0.8 | −1.8 | +3.2 | −2.2 | +2.8 | +1.4 | +1.1 | +2.9 | +2.0 |
| 2021 | −1.5 | −1.5 | +1.4 | −2.2 | −1.5 | +3.4 | +2.7 | −1.2 | −0.1 | +1.2 | +0.6 | −2.9 |
| 2022 | +2.6 | +1.9 | +2.5 | −1.6 | −0.7 | +1.9 | +0.2 | +2.7 | −0.8 | +2.5 | +1.5 | −2.1 |
| 2023 | +2.3 | +1.9 | −0.9 | −0.7 | +1.3 | +3.4 | −1.7 | −1.3 | +2.8 | −0.4 | −2.5 | −1.5 |
| 2024 | −1.5 | +1.7 | +1.3 | −2.0 | +3.8 | −0.3 | −1.3 | +0.4 | +1.3 | +1.6 | +0.8 | +2.3 |
| 2025 | +2.0 | +0.5 | +2.7 | +2.2 | −1.4 | −0.4 | +1.7 | −0.3 | +1.9 | +0.8 | +0.2 | +2.8 |
+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 (Q1758931) · 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.
