Lagoon · Germany
Binnenalster
Reservoir in Germany
- Area
- 1.6km²
- Average depth
- 2.9m
- Elevation
- 2m a.s.l.
- Shoreline
- 6.5km
- Volume
- 0.005km³
Binnenalster is a lagoon in Germany. It covers 1.6 km². On average it is 2.9 m deep. Its surface lies 2 m above sea level.
Plan your visit
Stay, sail and get there
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The water
How warm is Binnenalster?
The water is warmest in July, around 23 °C at the surface, and coldest in January, around 1 °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 23 °C on average in July and 3 °C in January. The driest month is April (40 mm of rain), the wettest July (84 mm).
Average surface temperature measured by the Landsat 8 satellite between 2013 and 2021 at the point furthest from the shore (96 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 | 1 | 2 | 3 | -2 | 70 | 14 | 0.7 | 20 |
| February | 2 | 4 | 4 | -2 | 54 | 12 | 2.1 | 19 |
| March | 6 | 8 | 8 | 0 | 50 | 12 | 4.0 | 19 |
| April | 11 | 14 | 14 | 4 | 40 | 10 | 6.6 | 17 |
| May | 17 | 19 | 18 | 8 | 58 | 11 | 7.3 | 16 |
| June | 21 | 23 | 21 | 11 | 70 | 14 | 7.5 | 16 |
| July | 23 | 23 | 23 | 14 | 84 | 16 | 7.0 | 15 |
| August | 22 | 23 | 22 | 13 | 71 | 14 | 6.3 | 15 |
| September | 17 | 20 | 19 | 10 | 58 | 12 | 5.3 | 16 |
| October | 12 | 14 | 13 | 6 | 63 | 13 | 3.1 | 17 |
| November | 6 | 9 | 8 | 3 | 63 | 14 | 1.1 | 17 |
| December | 3 | 4 | 4 | 0 | 71 | 14 | 0.5 | 19 |
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 7 days before flowing out.
- Its catchment drains 538 km² of land.
- About 7.9 m³ of water flow out every second, on average.
Around the shore
What's around Binnenalster
Counted within 1.5 km of the shoreline in OpenStreetMap, the map anyone can edit.
- 1beaches and swimming spots
- —campsites
- 22boat hire and water-sport clubs
Geronimo, Kübi's Bootshaus, SUP Club Hamburg, Alstersurfer, barca and 17 more
- 15marinas and slipways
Norddeutscher Regatta Verein, Segelschule Käpt'n Prüsse, Hamburger Segel-Club, barca, OSG Steg and 10 more
- 9ferry piers
Atlantic, Uhlenhorster Fährhaus, Rabenstraße, Fährdamm, Krugkoppelbrücke and 4 more
- 13viewpoints
St. Nikolai Kirche - Aussichtsplattform, St. Petri, Historische Häuser and 10 more
- 146hotels, B&Bs and chalets
Steigenberger Hotel, Conrad Hamburg, IntercityHotel Hamburg Hauptbahnhof, Crowne Plaza, A&O Hamburg Hauptbahnhof and 141 more
- —fishing spots
- 955restaurants and cafés
Towns on the shore
- Hamburg1,973,896 people
- Hamburg-Nord315,514 people
- Hamburg-Mitte301,231 people
- Eimsbüttel269,118 people
- Winterhude56,382 people
- Hamm37,989 people
- Barmbek-Süd35,880 people
- Eppendorf24,806 people
Nearest airport with scheduled flights: Hamburg Helmut Schmidt Airport (HAM), 7 km in a straight line.
Car hire at HAM airport (Hamburg)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 | 2.8 | 4.0 | 7.9 | 13.6 | 17.8 | 20.9 | 22.8 | 22.4 | 18.7 | 13.3 | 7.6 | 3.8 |
| 2020 | +3.6 | +3.8 | +1.2 | +1.3 | −1.2 | +1.3 | −1.6 | +2.6 | +1.0 | +0.4 | +1.8 | +0.4 |
| 2021 | −0.4 | −0.5 | +1.3 | −3.0 | −3.1 | +3.0 | +0.7 | −1.7 | +1.2 | +1.0 | +0.7 | ±0.0 |
| 2022 | +2.9 | +3.6 | +1.9 | −1.1 | +0.7 | +1.5 | +0.3 | +2.9 | −0.9 | +3.5 | +0.9 | −0.5 |
| 2023 | +3.3 | +2.6 | +0.9 | −0.9 | +0.4 | +2.8 | −0.8 | −0.2 | +3.9 | +1.2 | +0.3 | +1.3 |
| 2024 | +0.9 | +4.5 | +3.3 | ±0.0 | +2.8 | −0.3 | +0.1 | +1.4 | +1.3 | +1.4 | +0.2 | +2.2 |
| 2025 | +0.9 | +0.4 | +2.9 | +2.2 | +0.3 | +1.0 | +0.1 | +0.3 | +0.9 | +0.6 | +0.4 | +1.9 |
+1 warmer than usual −1 cooler than usual
Nearby
More lakes nearby
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 (Q3238460) · 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.
