Lake · Finland
Hiidenvesi
Lake in Uusimaa, Finland
- Area
- 27.8km²
- Average depth
- 17m
- Elevation
- 27m a.s.l.
- Shoreline
- 81km
- Volume
- 0.477km³
Hiidenvesi is a lake in Finland. It covers 27.8 km². On average it is 17 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 Hiidenvesi?
The water is warmest in July, around 21 °C at the surface, and coldest in January, around 0 °C. The surface averages 20 °C or more in July: comfortable for most swimmers.
The lake usually freezes over for about 124 days a year, from around 26 November to 29 March.
On the shore, afternoons reach 22 °C on average in July and -4 °C in January. The driest month is March (44 mm of rain), the wettest October (77 mm).
Average surface temperature measured by the Landsat 8 satellite between 2013 and 2021 at the point furthest from the shore (87 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 | -9 | 57 | 13 | 0.3 | 10 |
| February | Ice | — | -4 | -10 | 46 | 11 | 1.7 | 10 |
| March | Ice | — | 1 | -6 | 44 | 11 | 4.8 | 10 |
| April | 4 | 8 | 8 | -1 | 46 | 10 | 6.8 | 9 |
| May | 12 | 15 | 15 | 5 | 53 | 10 | 8.7 | 8 |
| June | 18 | 20 | 19 | 9 | 76 | 12 | 8.3 | 8 |
| July | 21 | 21 | 22 | 13 | 74 | 14 | 8.3 | 8 |
| August | 20 | 21 | 20 | 12 | 72 | 13 | 6.7 | 8 |
| September | 16 | 18 | 15 | 7 | 61 | 12 | 4.2 | 8 |
| October | 10 | 13 | 8 | 2 | 77 | 13 | 1.9 | 9 |
| November | 3 | 6 | 2 | -2 | 70 | 15 | 0.2 | 9 |
| December | Ice | — | -1 | -6 | 68 | 15 | 0.0 | 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 3.3 years before flowing out.
- Its catchment drains 454 km² of land.
- About 4.5 m³ of water flow out every second, on average.
- Its shoreline is 4.3 times longer than a circle of the same area: plenty of bays and inlets.
Around the shore
What's around Hiidenvesi
Counted within 1.5 km of the shoreline in OpenStreetMap, the map anyone can edit.
- 7beaches and swimming spots
Hiidenrannan uimaranta, Kirkonkylän uimaranta, Varikkaan uimaranta, Rämäkän uimaranta and 3 more
- 4campsites
Pääkslahti Caravan, Kultahiekka Caravan, Pääkslahden leirintäalue
- 2boat hire and water-sport clubs
Seuramaja
- 6marinas and slipways
Hiidenpirtin veneluiska, Vihdin kirkonkylän veneluiska, Hiidenrannan veneluiska, Kirkonkylän veneranta, Nummelan veneranta and 1 more
- —ferry piers
- 8viewpoints
Haudankallio, Laukkakallio, Kokkokallio, Mustakellari and 4 more
- 19hotels, B&Bs and chalets
Selli majoitus, Villa Björkbacken, Forenom Serviced Apartments Vihti, Air Hotel Nummela, Päivölän Virkistyskoti and 14 more
- —fishing spots
- 10restaurants and cafés
Towns on the shore
- Vihti28,864 people
Nearest airport with scheduled flights: Helsinki Vantaa Airport (HEL), 44 km in a straight line.
Car hire at HEL airport (Helsinki)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 | -3.5 | 0.6 | 8.2 | 15.2 | 18.9 | 22.0 | 20.3 | 15.1 | 7.6 | 2.3 | -1.4 |
| 2020 | +5.9 | +5.2 | +2.8 | −0.8 | −2.4 | +3.5 | −2.3 | +0.3 | +0.8 | +2.4 | +2.9 | +1.7 |
| 2021 | −1.7 | −3.2 | +0.8 | −0.1 | −1.1 | +4.5 | +2.7 | −1.7 | −2.4 | +1.7 | +0.2 | −3.9 |
| 2022 | +1.4 | +2.2 | +1.7 | −1.1 | −1.4 | +2.2 | −0.4 | +2.2 | −2.0 | +2.5 | +0.6 | −1.5 |
| 2023 | +2.4 | +2.7 | +0.1 | +1.7 | +0.1 | +2.6 | −1.3 | +0.6 | +3.2 | −1.1 | −2.4 | −3.7 |
| 2024 | −3.1 | +1.0 | +2.4 | −1.8 | +3.9 | +2.1 | ±0.0 | +1.2 | +3.1 | +2.5 | +1.1 | +2.3 |
| 2025 | +3.4 | +1.8 | +3.8 | +1.1 | −1.4 | −0.8 | +2.4 | −1.1 | +1.9 | +1.2 | +2.4 | +3.4 |
+1 warmer than usual −1 cooler than usual
EstoniaAbout 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 (Q673714) · 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.
