Alster River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Alster River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Alster River today is 21.1°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| JUN 26 | 20.8°C | 20.0°C | |
| JUN 27 | 21.3°C | 20.0°C | |
| JUN 28 | 21.5°C | 20.0°C | |
| JUN 29 | 22.1°C | 20.0°C | |
| JUN 30 | 22.3°C | 20.0°C | |
| JUL 1 | 21.9°C | 20.4°C | |
| JUL 2 | 21.9°C | 20.4°C | |
| JUL 3 | 21.1°C | 20.4°C | |
| JUL 4 | 20.4°C | 21.1°C | |
| JUL 5 | 20.4°C | 21.0°C | |
| JUL 6 | 20.4°C | 21.0°C | |
| JUL 7 | 20.4°C | 21.0°C | |
| JUL 8 | 20.4°C | 20.9°C | |
| JUL 9 | 20.4°C | 20.9°C | |
| JUL 10 | 20.4°C | 20.9°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 1°C | 3°C | 5°C |
| February | 1°C | 4°C | 6°C |
| March | 4°C | 7°C | 9°C |
| April | 7°C | 11°C | 14°C |
| May | 11°C | 14°C | 17°C |
| June | 15°C | 20°C | 24°C |
| July | 17°C | 20°C | 25°C |
| August | 18°C | 20°C | 23°C |
| September | 14°C | 19°C | 23°C |
| October | 10°C | 13°C | 16°C |
| November | 3°C | 8°C | 11°C |
| December | 1°C | 4°C | 7°C |
Alster River: Water Temperature by Location
Alster River: Weather Forecast
July 4
July 5
July 6
July 7
July 8
July 9
Location & Local Information
Source:
• location Henstedt-Ulzburg
• coordinates 53°45′49.1″N 10°0′17.4″E
• elevation 31 m (102 ft)
Mouth Elbe
• location Hamburg
• coordinates 53°32′40″N 9°59′0″E
• elevation 4 m (13 ft)
Length 56 km (35 mi)
The Alster River in Hamburg, Germany, is a popular spot for both locals and tourists, especially during the warmer months. The water temperature of the Alster varies depending on the season, with the summer months seeing temperatures rise to between 18°C and 22°C (64°F - 72°F). These temperatures make it suitable for swimming, especially in designated areas like the Alster Swimming Zone near the city center. The Alster is relatively clean compared to many other rivers in Germany, as it is fed by lakes and is part of a highly managed water system. As such, it is one of the more popular places for swimming, kayaking, and other water activities.
Swimming in the Alster is safe when undertaken in designated swimming areas, though the water temperature can be lower in the spring and fall, requiring a wetsuit for comfort. Since the river is surrounded by urban areas, it can sometimes be affected by pollution, but the local authorities regularly monitor water quality. The Alster is also home to several recreational spots and parks, making it an attractive place for swimmers to enjoy the natural beauty of Hamburg. However, the river’s currents can be strong in certain parts, so swimmers should remain cautious in areas with faster-moving water.