Heidelberg — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Heidelberg, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Heidelberg today is 18.4°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 2 | 19.3°C | 20.4°C | |
| JUN 3 | 19.2°C | 20.4°C | |
| JUN 4 | 19.1°C | 20.4°C | |
| JUN 5 | 18.8°C | 20.4°C | |
| JUN 6 | 18.3°C | 20.4°C | |
| JUN 7 | 18.2°C | 20.4°C | |
| JUN 8 | 18.0°C | 20.4°C | |
| JUN 10 | 20.4°C | 18.5°C | |
| JUN 11 | 20.4°C | 18.6°C | |
| JUN 12 | 20.4°C | 18.7°C | |
| JUN 13 | 20.4°C | 18.8°C | |
| JUN 14 | 20.4°C | 18.9°C | |
| JUN 15 | 20.4°C | 19.0°C | |
| JUN 16 | 20.4°C | 19.1°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 | 6°C | 8°C |
| February | 0°C | 4°C | 8°C |
| March | 4°C | 7°C | 10°C |
| April | 8°C | 12°C | 15°C |
| May | 11°C | 16°C | 20°C |
| June | 17°C | 20°C | 24°C |
| July | 19°C | 22°C | 27°C |
| August | 19°C | 22°C | 26°C |
| September | 15°C | 20°C | 25°C |
| October | 10°C | 13°C | 16°C |
| November | 5°C | 9°C | 13°C |
| December | 4°C | 6°C | 8°C |
Heidelberg: Weather Forecast
June 9
June 10
June 11
June 12
June 13
June 14
Location & Local Information
Heidelberg, a city in the state of Baden-Württemberg in Germany, is situated on the banks of the Neckar river. This river runs for roughly 367 kilometers, flowing from the Black Forest and ultimately joining the Rhine. The water temperature of the Neckar river in Heidelberg generally varies according to the time of year. In the peak of summer, around July and August, the temperature can reach up to 20-22°C. However, the water temperature significantly decreases in the colder months, dropping down to as low as 4°C. Due to this variable water temperature, it is crucial to approach swimming in this river with caution based on weather and water conditions.
Though swimming in the Neckar river is technically possible, it is not generally encouraged due to multiple factors. Besides the fluid temperature, the river's flow rate can be quite high, especially after periods of heavy rainfall. Consequently, swimming can be more challenging and potentially dangerous. Additionally, commercial ships frequently travel through this river, leading to safety concerns for swimmers in the water. Rather than swimming, locals and visitors often engage in other water-based activities like canoeing, touring boats, or simply relishing the river banks, undoubtedly providing stunning views of the city's historical architecture, including the famous Heidelberg Castle. It is always advised to follow local rules and guidelines concerning water activities for safety.