Lake · Norway
Tyrifjorden
Lake in Norway
- Area
- 136km²
- Max depth
- 295m
- Average depth
- 53m
- Elevation
- 54m a.s.l.
- Shoreline
- 156km
- Volume
- 7.2km³
Tyrifjorden is a lake in Norway. It covers 136 km². On average it is 53 m deep, and 295 m at its deepest point. Its surface lies 54 m above sea level.
Plan your visit
Stay, sail and get there
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The water
How warm is Tyrifjorden?
The water is warmest in July, around 19 °C at the surface, and coldest in March, around 1 °C. It rarely averages 20 °C, but it stays above 17 °C from July to August: brisk, refreshing swimming.
It does not normally freeze in winter.
On the shore, afternoons reach 20 °C on average in July and -4 °C in January. The driest month is March (57 mm of rain), the wettest August (122 mm).
Average surface temperature measured by the Landsat 8 satellite between 2013 and 2021 at the point furthest from the shore (91 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 | 2 | 3 | -4 | -9 | 76 | 13 | 0.6 | 8 |
| February | 1 | 2 | -3 | -9 | 58 | 11 | 2.4 | 7 |
| March | 1 | 1 | 1 | -6 | 57 | 10 | 5.2 | 7 |
| April | 3 | 5 | 8 | -1 | 62 | 11 | 6.6 | 7 |
| May | 8 | 11 | 14 | 4 | 95 | 13 | 7.3 | 7 |
| June | 14 | 17 | 18 | 9 | 100 | 14 | 8.6 | 6 |
| July | 19 | 19 | 20 | 11 | 116 | 17 | 7.6 | 6 |
| August | 18 | 19 | 18 | 10 | 122 | 16 | 6.2 | 6 |
| September | 14 | 16 | 14 | 6 | 98 | 13 | 4.7 | 7 |
| October | 9 | 12 | 7 | 1 | 104 | 15 | 2.4 | 7 |
| November | 6 | 7 | 1 | -4 | 91 | 15 | 0.8 | 7 |
| December | 4 | 5 | -3 | -8 | 76 | 13 | 0.4 | 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 15 months before flowing out.
- Its catchment drains 10,095 km² of land.
- About 183 m³ of water flow out every second, on average.
- Its shoreline is 3.8 times longer than a circle of the same area: plenty of bays and inlets.
Around the shore
What's around Tyrifjorden
Counted within 1.5 km of the shoreline in OpenStreetMap, the map anyone can edit.
- 11beaches and swimming spots
Svangstrand, Tyrifjord hotell and 9 more
- 11campsites
Natvedt Camping, Nes Leirplass, Utvika Camping, Hollerud Camping, Odin Camping AS and 6 more
- 1boat hire and water-sport clubs
Røsholmstranda
- 12marinas and slipways
Storøen Båthavner, Åsatangen, Hagastua, Gomserud, Berg and 7 more
- 2ferry piers
Utøykaia, Utøya
- 19viewpoints
Kongens utsikt, Kronprinsens utsikt, Hortenkollen, Gjertrussen, Dronningens utsikt and 14 more
- 2hotels, B&Bs and chalets
Tyrifjord hotell, Sundvolden hotell
- —fishing spots
- 6restaurants and cafés
Towns on the shore
- Vikersund3,232 people
- Vik
Nearest airport with scheduled flights: Oslo-Gardermoen International Airport (OSL), 56 km in a straight line.
Car hire at OSL airport (Oslo)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 | -3.8 | -2.8 | 1.0 | 7.5 | 13.8 | 17.9 | 19.9 | 18.3 | 13.8 | 6.8 | 1.0 | -3.0 |
| 2020 | +3.8 | +3.6 | +1.5 | +0.9 | −1.4 | +2.7 | −3.0 | +1.4 | +0.3 | +1.3 | +3.3 | +2.1 |
| 2021 | −3.6 | −2.7 | +1.2 | −1.1 | −1.6 | +2.7 | +1.8 | −0.3 | +0.8 | +2.1 | +0.8 | −1.9 |
| 2022 | +2.4 | +2.1 | +3.1 | +0.8 | −0.1 | +1.4 | −0.3 | +1.3 | −0.4 | +1.9 | +2.3 | −3.2 |
| 2023 | +0.3 | +1.8 | −2.5 | −2.2 | +0.5 | +3.8 | −1.7 | +0.2 | +2.3 | −0.9 | −4.0 | −3.4 |
| 2024 | −1.4 | ±0.0 | +0.2 | −1.7 | +4.3 | −0.3 | −0.7 | −0.1 | +1.4 | +2.1 | +1.2 | +2.1 |
| 2025 | +0.1 | +0.2 | +3.7 | +4.5 | +0.9 | −0.3 | +2.7 | ±0.0 | +0.6 | +1.4 | +1.5 | +3.1 |
+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 (Q696445) · 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.
