Sweden 
In numbers.
26m
Height
OpenStreetMap
59m³/s
Average flow
estimate
May–Jul
Sep
Best months
15MW
Water power
estimate
The water at Tännforsen, month by month
It roars from May to June.
The fullest months: from May to June, with the snowmelt. The thinnest: February. Below −4 °C on average (from December to March): the falls can partly freeze.
- 38 m³/sJan
- 15 m³/sFeb
- 26 m³/sMar
- 96 m³/sApr
- 197 m³/sMay
- 164 m³/sJun
- 113 m³/sJul
- 86 m³/sAug
- 89 m³/sSep
- 66 m³/sOct
- 57 m³/sNov
- 59 m³/sDec
From about 15 m³/s in the lowest month to 197 m³/s in the highest. Best months to go, with plenty of water and pleasant days: from May to July and September.
Estimate: the timing comes from rain, snowmelt and evaporation (NASA POWER, 1991–2020); the amounts from the river model of HydroATLAS (WaterGAP, 1971–2000). Dams upstream can change the real flow.
Waterfall in Jämtland
Tännforsen is a waterfall in Sweden. The water falls 26 m over a front 57 m wide.
Getting there.
- Årenearest town · 18 km in a straight line
- Parking 210 m awaynearest car park in OpenStreetMap, straight line
- Trondheim Airport, Værnes (TRD)nearest airport with scheduled flights · 90 km in a straight lineCar hire at TRD airport (Trondheim)Discover Cars · Affiliate link↗
- From May to July and Septemberbest months to go (estimate)
Plan your visit
Stay, explore and get there
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.
How big is it?
How big it really is.
Height of the drop as mapped in OpenStreetMap (© OpenStreetMap contributors). Buildings and the person are drawn at the same scale.
15 MW
About 59 m³/s falling 26 m: the power of the water as it drops.
- as much as 5.0 large wind turbines
- enough to power about 3,700 homes, if it were all turned into electricity
Power of falling water = density × gravity × flow × height. Average flow and height as shown above; an estimate.
Seen from the sky.
8 × 8 km of cloud-free satellite image, with what OpenStreetMap knows around the falls.
N
2 km
Sentinel-2 cloudless 2016 (EOX, CC BY 4.0), 8 × 8 km, north up. Points © OpenStreetMap contributors.
What is around.
- 3viewpoints
- 2waymarked walking routesSt. Olavsleden dagsetapp Tännforsen – Medstugan, St. Olavsleden dagsetapp Åre – Tännforsen
- 4car parks
- —swimming spots
- 5picnic sites
- 1toilets
- —information boards and visitor centres
- —bus stops within 1 km
- —other named waterfalls within 4 km
- —caves
- 1campsites
- 1hotels, B&Bs and huts within 6 km
- 1restaurants and cafés within 3 km
Counted in OpenStreetMap, the map anyone can edit, up to 2 km around the falls (unless noted). A low number may just mean nobody has mapped it yet. © OpenStreetMap contributors (ODbL).
Towns nearby
- Åre18 km in a straight line
Weather
The weather, month by month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Afternoon °C | -4 | -3 | -1 | 3 | 9 | 14 | 18 | 16 | 11 | 5 | 0 | -3 |
| Night °C | -9 | -9 | -7 | -2 | 2 | 7 | 10 | 9 | 6 | 0 | -4 | -8 |
| Rain & snow (mm) | 138 | 116 | 127 | 98 | 111 | 156 | 164 | 155 | 156 | 128 | 127 | 152 |
| Wet days | 20 | 19 | 20 | 17 | 20 | 22 | 24 | 22 | 19 | 21 | 18 | 21 |
| Sun h/day | 0.5 | 1.8 | 4.6 | 7.5 | 7.1 | 7.3 | 7.3 | 5.9 | 3.6 | 2.0 | 0.6 | 0.4 |
| Snow on the ground (cm) | 68 | 92 | 106 | 78 | 17 | 2 | 0 | 0 | 2 | 12 | 24 | 43 |
Long-term averages 1991–2020 (NASA POWER) for a cell about 55 km wide, with temperatures carried to the height of the falls (426 m) at −6.5 °C per 1,000 m. Not a forecast.
Photos
Through visitors' eyes.
Recent years
Wet years and dry years
Rain of each month as a share of the 1991–2020 average. A wet season above 100 % usually means a fuller waterfall.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | 174% | 145% | 114% | 169% | 112% | 60% | 142% | 92% | 114% | 98% | 131% | 42% |
| 2021 | 49% | 73% | 155% | 149% | 59% | 118% | 80% | 138% | 127% | 193% | 123% | 91% |
| 2022 | 204% | 113% | 110% | 116% | 140% | 125% | 158% | 82% | 57% | 122% | 38% | 57% |
| 2023 | 104% | 140% | 99% | 90% | 114% | 86% | 110% | 121% | 116% | 135% | 55% | 59% |
| 2024 | 116% | 96% | 43% | 87% | 54% | 108% | 134% | 142% | 92% | 141% | 169% | 135% |
| 2025 | 104% | 63% | 198% | 142% | 156% | 164% | 90% | 135% | 76% | 165% | 122% | 115% |
130% wetter than usual 70% drier than usual
Compare with the waterfalls nearby.
Tännforsen
Sweden
- 26 mHeight
- 59 m³/sAverage flow
- May–Jul, SepBest months
About these numbers
| Names, height, width, river | Wikidata (Q55402245) · CC0 |
|---|---|
| Height of the drop | © OpenStreetMap contributors · ODbL |
| River flow and catchment | HydroATLAS / RiverATLAS v1.0 (Linke et al. 2019) · CC BY 4.0 |
| Climate | NASA POWER, 1991–2020 |
| Relief, river profile, 3D model | Copernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA |
| Paths, viewpoints, parking | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.
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