Reservoir · Czechia
Slapy Reservoir
Lake at Slapy, Central Bohemian Region, Czech Republic
- Area
- 10.4km²
- Max depth
- 58m
- Average depth
- 26m
- Elevation
- 272m a.s.l.
- Shoreline
- 91km
- Volume
- 0.269km³
Slapy Reservoir is a reservoir in Czechia. It covers 10.4 km². On average it is 26 m deep, and 58 m at its deepest point. Its surface lies 272 m above sea level.
Plan your visit
Stay, sail and get there
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The water
How warm is Slapy Reservoir?
The water is warmest in July, around 24 °C at the surface, and coldest in January, around 3 °C. The surface averages 20 °C or more from June to August: comfortable for most swimmers.
It does not normally freeze in winter.
On the shore, afternoons reach 25 °C on average in July and 0 °C in January. The driest month is February (35 mm of rain), the wettest August (89 mm).
Average surface temperature measured by the Landsat 8 satellite between 2013 and 2021 at the point furthest from the shore (117 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 | 3 | 3 | 0 | -6 | 46 | 11 | 1.7 | 18 |
| February | 3 | 4 | 2 | -5 | 35 | 9 | 3.5 | 18 |
| March | 6 | 8 | 7 | -2 | 44 | 11 | 4.6 | 17 |
| April | 11 | 14 | 14 | 3 | 40 | 9 | 6.3 | 15 |
| May | 17 | 20 | 18 | 8 | 75 | 14 | 6.7 | 14 |
| June | 22 | 23 | 22 | 12 | 87 | 14 | 7.3 | 13 |
| July | 24 | 24 | 25 | 14 | 84 | 15 | 7.3 | 13 |
| August | 22 | 23 | 24 | 13 | 89 | 12 | 6.8 | 12 |
| September | 19 | 21 | 19 | 8 | 55 | 10 | 5.2 | 14 |
| October | 14 | 17 | 13 | 4 | 47 | 10 | 3.3 | 15 |
| November | 9 | 11 | 6 | 0 | 42 | 10 | 1.2 | 15 |
| December | 5 | 6 | 2 | -4 | 41 | 11 | 1.3 | 17 |
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 40 days before flowing out.
- Its catchment drains 12,875 km² of land.
- About 79 m³ of water flow out every second, on average.
- Its shoreline is 8.0 times longer than a circle of the same area: plenty of bays and inlets.
Around the shore
What's around Slapy Reservoir
Counted within 1.5 km of the shoreline in OpenStreetMap, the map anyone can edit.
- 6beaches and swimming spots
Kujalův lom, pláž pro veřejnost and 4 more
- 15campsites
Autokemp Slapy Skalice, Kemp Cholín, RS Častoboř, Oboz, Tábořiště Nová Živohošť and 10 more
- 4boat hire and water-sport clubs
Slapy Ždáň, Slapy Stará Živohošť
- 13marinas and slipways
Zastávka Slapy PPS and 12 more
- 11ferry piers
Ždáň, Slapská přehrada, Měřín, Rabyně, Nová Živohošť and 6 more
- 19viewpoints
svatý Jan Nepomucký, Albertovy skály, Bartůňkova vyhlídka, Vyhlídka Opata Zaorala, Bednář and 14 more
- 11hotels, B&Bs and chalets
Laguna, Penzion Janata, Hladina, Hotel MĚŘÍN, Penzion Kamejk and 6 more
- —fishing spots
- 16restaurants and cafés
Nearest airport with scheduled flights: Václav Havel Airport Prague (PRG), 45 km in a straight line.
Car hire at PRG airport (Prague)Discover Cars · Affiliate linkOpenStreetMap is built by volunteers: when a number is low, it may just mean nobody has mapped it yet.
Photos
Seen by visitors
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 | 0.3 | 2.3 | 7.3 | 13.7 | 18.2 | 22.4 | 24.9 | 24.5 | 19.1 | 12.9 | 6.3 | 1.6 |
| 2020 | +2.4 | +4.2 | +0.8 | +2.2 | −1.2 | −1.9 | −0.9 | +0.7 | +1.3 | −0.5 | +0.4 | +0.9 |
| 2021 | −0.2 | +0.7 | −0.5 | −3.8 | −3.7 | +1.5 | −0.9 | −3.1 | +1.7 | +1.2 | −0.2 | +0.3 |
| 2022 | +2.1 | +3.0 | +1.3 | −2.0 | +2.4 | +3.2 | +0.8 | +1.6 | −1.1 | +3.3 | +1.4 | +0.6 |
| 2023 | +3.6 | +2.0 | +1.5 | −2.9 | −0.5 | +0.5 | +1.9 | ±0.0 | +4.4 | +3.9 | +0.8 | +2.0 |
| 2024 | +1.7 | +5.7 | +4.2 | +1.0 | +0.5 | +0.4 | +0.3 | +2.5 | +0.9 | +1.0 | −0.4 | +0.8 |
| 2025 | +2.1 | +0.4 | +2.5 | +1.7 | −0.8 | +3.2 | −0.2 | +1.5 | +1.2 | −0.5 | −0.6 | +1.1 |
+1 warmer than usual −1 cooler than usual
Nearby
More lakes nearby
Germany
AustriaAbout 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 (Q1131722) · 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.
