Lake · Norway
Vestvannet
Lake in Sarpsborg, Norway
- Area
- 27.4km²
- Average depth
- 28m
- Elevation
- 27m a.s.l.
- Shoreline
- 119km
- Volume
- 0.773km³
Vestvannet is a lake in Norway. It covers 27.4 km². On average it is 28 m deep. Its surface lies 27 m above sea level.
Plan your visit
Stay, sail and get there
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The water
How warm is Vestvannet?
The water is warmest in July, around 18 °C at the surface, and coldest in January, 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 75 days a year, from around 23 December to 7 March.
On the shore, afternoons reach 21 °C on average in July and -2 °C in January. The driest month is March (53 mm of rain), the wettest August (116 mm).
Average surface temperature measured by the Landsat 8 satellite between 2013 and 2021 at the point furthest from the shore (105 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 | — | -2 | -6 | 80 | 14 | 0.4 | 9 |
| February | Ice | — | -1 | -6 | 61 | 12 | 1.8 | 8 |
| March | 1 | 2 | 3 | -3 | 53 | 10 | 4.8 | 8 |
| April | 4 | 6 | 10 | 2 | 58 | 11 | 6.6 | 8 |
| May | 9 | 12 | 15 | 6 | 82 | 12 | 8.2 | 8 |
| June | 14 | 16 | 19 | 11 | 86 | 14 | 9.4 | 8 |
| July | 18 | 18 | 21 | 13 | 102 | 15 | 8.2 | 8 |
| August | 17 | 18 | 19 | 12 | 116 | 16 | 6.6 | 8 |
| September | 13 | 16 | 15 | 8 | 90 | 13 | 5.1 | 9 |
| October | 8 | 10 | 9 | 4 | 105 | 15 | 2.5 | 9 |
| November | 3 | 5 | 4 | 0 | 97 | 15 | 0.8 | 9 |
| December | 1 | 2 | 0 | -5 | 80 | 14 | 0.3 | 9 |
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 days before flowing out.
- Its catchment drains 40,975 km² of land.
- About 653 m³ of water flow out every second, on average.
- Its shoreline is 6.4 times longer than a circle of the same area: plenty of bays and inlets.
Around the shore
What's around Vestvannet
Counted within 1.5 km of the shoreline in OpenStreetMap, the map anyone can edit.
- 8beaches and swimming spots
- 1campsites
Nye Glennetangen camping
- —boat hire and water-sport clubs
- 10marinas and slipways
Skjørshammer brygge, Båtutsetting, Grønnsund båtrampe, Båtrampe and 6 more
- —ferry piers
- 10viewpoints
Appelsintoppen, Skinterfjell, Ravneberget, Bronsealderrøyser, Sarpefossen and 5 more
- 9hotels, B&Bs and chalets
Quality Hotel Sarpsborg, Tuneheimen, Scandic Sarpsborg, Stenbekk, Harehjellhytta and 4 more
- —fishing spots
- 22restaurants and cafés
Towns on the shore
- Sarpsborg59,038 people
- Meieribyen
Nearest airport with scheduled flights: Sandefjord Airport, Torp (TRF), 59 km in a straight line.
Car hire at TRF airport (Sandefjord)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 | -1.6 | -0.8 | 3.4 | 9.5 | 14.7 | 18.6 | 20.6 | 19.4 | 15.2 | 8.8 | 3.6 | -0.4 |
| 2020 | +5.8 | +4.6 | +1.4 | +0.9 | −1.2 | +3.0 | −2.7 | +1.1 | +0.3 | +1.2 | +3.0 | +2.2 |
| 2021 | −3.6 | −2.4 | +1.7 | −0.9 | −1.4 | +2.1 | +2.0 | −0.4 | +0.5 | +2.1 | +0.6 | −2.6 |
| 2022 | +2.6 | +3.0 | +2.4 | −0.2 | −0.1 | +1.5 | −0.2 | +1.3 | −0.4 | +2.0 | +1.7 | −2.5 |
| 2023 | +1.7 | +2.9 | −1.2 | +0.1 | +1.2 | +3.4 | −1.7 | −0.1 | +2.3 | −0.9 | −3.9 | −3.6 |
| 2024 | −2.5 | +0.8 | +1.0 | −1.2 | +4.1 | −0.4 | −1.0 | ±0.0 | +1.3 | +1.9 | +0.9 | +2.5 |
| 2025 | +0.7 | +1.1 | +2.6 | +2.8 | +0.1 | −0.3 | +2.7 | −0.1 | +1.1 | +1.0 | +1.4 | +3.4 |
+1 warmer than usual −1 cooler than usual
SwedenAbout 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 (Q6515479) · 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.
