Hennef — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Hennef, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Hennef today is 20.3°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 |
|---|---|---|---|
| AUG 24 | 21.0°C | 19.6°C | |
| AUG 25 | 20.6°C | 19.6°C | |
| AUG 26 | 20.5°C | 19.6°C | |
| AUG 27 | 20.5°C | 19.6°C | |
| AUG 28 | 20.4°C | 19.6°C | |
| AUG 29 | 20.4°C | 19.6°C | |
| AUG 30 | 20.3°C | 19.6°C | |
| AUG 31 | 20.3°C | 19.6°C | |
| SEP 1 | 15.3°C | 20.1°C | |
| SEP 2 | 15.3°C | 19.8°C | |
| SEP 3 | 15.3°C | 19.6°C | |
| SEP 4 | 15.3°C | 19.3°C | |
| SEP 5 | 15.3°C | 19.1°C | |
| SEP 6 | 15.3°C | 18.8°C | |
| SEP 7 | 15.3°C | 18.6°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 | 3°C | 5°C | 7°C |
| February | 3°C | 6°C | 8°C |
| March | 6°C | 9°C | 12°C |
| April | 7°C | 11°C | 14°C |
| May | 10°C | 15°C | 19°C |
| June | 16°C | 20°C | 24°C |
| July | 18°C | 21°C | 26°C |
| August | 15°C | 20°C | 25°C |
| September | 12°C | 15°C | 20°C |
| October | 11°C | 13°C | 14°C |
| November | 5°C | 9°C | 11°C |
| December | 3°C | 6°C | 9°C |
Hennef: Weather Forecast
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September 4
September 5
Location & Local Information
Hennef (Sieg) is situated in North Rhine-Westphalia, Germany, and is located along the Sieg River. This quaint city offers an ideal spot for outdoor enthusiasts who can dip their toes in the Sieg River, which is a significant geographical feature in the region. The Sieg River stands out for its biodiversity and distinct character. However, it should be noted that to obtain up-to-date water temperatures for the Sieg River, one must refer to local resources or online platforms that provide real-time water temperature data.
As for swimming in the Sieg River at Hennef, it is technically possible, but it's important to exercise caution. River currents can be unpredictable, and safety must always be the top priority. The water quality of the Sieg River is regularly monitored and classified as Class II, which designates it as 'moderately polluted'. While this doesn't automatically disqualify it for swimming, potential swimmers should be aware of this status. Despite this, the river's banks near Hennef are popular for local residents and tourists alike who enjoy waterside picnics, walks, and views. Always, it is recommended to check local regulations and guidance for swimming in the river, as rules may vary depending on the season and other environmental factors.