Reservoir · Poland
Zegrze Reservoir
Reservoir
- Area
- 15.7km²
- Average depth
- 6.0m
- Elevation
- 74m a.s.l.
- Shoreline
- 39km
- Volume
- 0.094km³
Zegrze Reservoir is a reservoir in Poland. It covers 15.7 km². On average it is 6.0 m deep. Its surface lies 74 m above sea level.
Plan your visit
Stay, sail and get there
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The water
How warm is Zegrze Reservoir?
The water is warmest in July, around 24 °C at the surface, and coldest in January, around 0 °C. The surface averages 20 °C or more from June to August: comfortable for most swimmers.
The lake usually freezes over for about 65 days a year, from around 12 December to 14 February.
On the shore, afternoons reach 25 °C on average in July and -1 °C in January. The driest month is March (37 mm of rain), the wettest July (74 mm).
Average surface temperature measured by the Landsat 8 satellite between 2013 and 2021 at the point furthest from the shore (82 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 | — | -1 | -7 | 44 | 10 | 0.9 | 18 |
| February | Ice | — | 1 | -6 | 37 | 10 | 2.4 | 18 |
| March | 5 | 8 | 7 | -2 | 37 | 10 | 4.3 | 18 |
| April | 11 | 14 | 14 | 3 | 40 | 9 | 6.4 | 16 |
| May | 18 | 20 | 20 | 9 | 72 | 12 | 7.6 | 15 |
| June | 22 | 23 | 23 | 13 | 67 | 13 | 8.0 | 14 |
| July | 24 | 24 | 25 | 15 | 74 | 13 | 7.4 | 14 |
| August | 23 | 24 | 25 | 14 | 64 | 11 | 7.0 | 13 |
| September | 18 | 21 | 20 | 9 | 51 | 10 | 5.3 | 14 |
| October | 11 | 15 | 13 | 4 | 49 | 9 | 3.0 | 16 |
| November | 4 | 7 | 6 | 1 | 44 | 10 | 0.7 | 17 |
| December | Ice | — | 1 | -4 | 45 | 10 | 0.5 | 18 |
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 4 days before flowing out.
- Its catchment drains 68,571 km² of land.
- About 314 m³ of water flow out every second, on average.
- Its shoreline is 2.8 times longer than a circle of the same area: plenty of bays and inlets.
Around the shore
What's around Zegrze Reservoir
Counted within 1.5 km of the shoreline in OpenStreetMap, the map anyone can edit.
- 27beaches and swimming spots
Plaża Wieliszew, Plaża miejska, Dzika Plaża Myszyniec, Plaża przyhotelowa, Plaża Arciechów and 22 more
- 1campsites
- 8boat hire and water-sport clubs
Kajaki, Zegrze 360, Water Club, Regatowy Klub Sportowy "Lasery Zegrze", Wypożyczalnia rowerków wodnych and 3 more
- 27marinas and slipways
Przystań Hotelu Warszawianka, WKS Zegrze, Port Jachtowy WAT, Port Rynia, Port jachtowy "Wodnik" and 22 more
- 5ferry piers
Cupel, Serock, Arciechów, WKS Zegrze
- 9viewpoints
Hammocks with marina view and 8 more
- 20hotels, B&Bs and chalets
Hotel Narvil Conference & Spa, Pod Jesionem, Klub Mila Zegrzynek, Willa Żaba, AMW Rewita Rynia and 15 more
- —fishing spots
- 31restaurants and cafés
Towns on the shore
- Serock4,023 people
- Wieliszew3,373 people
- Nieporęt3,239 people
- Białobrzegi1,208 people
Nearest airport with scheduled flights: Warsaw Modlin Airport (WMI), 25 km in a straight line.
Car hire at WMI airport (Nowy Dwór Mazowiecki)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 | -1.3 | 1.0 | 6.8 | 14.1 | 19.7 | 23.0 | 25.3 | 24.9 | 19.6 | 12.6 | 6.1 | 0.8 |
| 2020 | +4.6 | +4.8 | +1.8 | +0.5 | −2.8 | +0.8 | −1.2 | +0.8 | +1.6 | +1.1 | +0.9 | +0.9 |
| 2021 | −0.6 | −2.4 | −0.6 | −3.1 | −2.6 | +2.2 | +1.5 | −3.2 | −1.0 | +0.5 | +0.7 | −1.5 |
| 2022 | +3.2 | +3.9 | +0.8 | −3.1 | −0.8 | +2.0 | −0.9 | +2.0 | −2.5 | +2.8 | −0.5 | −1.1 |
| 2023 | +4.7 | +2.0 | +1.2 | −0.8 | −0.9 | +0.7 | +0.1 | +1.2 | +4.9 | +2.0 | −0.3 | +1.4 |
| 2024 | +1.9 | +6.6 | +3.5 | +1.5 | +2.4 | +1.2 | +1.5 | +1.6 | +4.6 | +1.7 | −0.6 | +2.4 |
| 2025 | +4.1 | +0.9 | +4.5 | +3.0 | −2.4 | +0.9 | ±0.0 | +0.5 | +1.9 | −0.1 | −0.5 | +1.9 |
+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 (Q184467) · 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.
