Lake Thun — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Thun, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Thun today is 19.8°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 |
|---|---|---|---|
| SEP 13 | 19.9°C | 19.4°C | |
| SEP 14 | 19.5°C | 19.4°C | |
| SEP 15 | 19.3°C | 19.4°C | |
| SEP 16 | 20.0°C | 19.4°C | |
| SEP 17 | 20.5°C | 19.4°C | |
| SEP 18 | 19.8°C | 19.4°C | |
| SEP 19 | 19.7°C | 19.4°C | |
| SEP 20 | 19.9°C | 19.4°C | |
| SEP 21 | 19.4°C | 19.8°C | |
| SEP 22 | 19.4°C | 19.8°C | |
| SEP 23 | 19.4°C | 19.7°C | |
| SEP 24 | 19.4°C | 19.7°C | |
| SEP 25 | 19.4°C | 19.7°C | |
| SEP 26 | 19.4°C | 19.7°C | |
| SEP 27 | 19.4°C | 19.7°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 | 2°C | 5°C | 8°C |
| February | 2°C | 5°C | 7°C |
| March | 5°C | 8°C | 10°C |
| April | 5°C | 10°C | 16°C |
| May | 9°C | 16°C | 23°C |
| June | 14°C | 20°C | 26°C |
| July | 16°C | 22°C | 29°C |
| August | 15°C | 22°C | 29°C |
| September | 15°C | 19°C | 24°C |
| October | 11°C | 14°C | 17°C |
| November | 6°C | 10°C | 13°C |
| December | 3°C | 6°C | 8°C |
Lake Thun: Water Temperature by Location
Lake Thun: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Type: freshwater fjord, recent regulation[1]
Primary inflows: Aare
Kander
Primary outflows: Aare
Catchment area: 2,500 km2 (970 sq mi)
Basin countries: Switzerland
Max. length: 17.5 km (10.9 mi)
Max. width: 3.5 km (2.2 mi)
Surface area: 48.3 km2 (18.6 sq mi)
Average depth: 136 m (446 ft)
Max. depth: 217 m (712 ft)
Water volume: 6.5 km3 (5,300,000 acre⋅ft)
Residence time: 684 days
Surface elevation: 558 m (1,831 ft)
Lake Thun is located in the Bernese Oberland region of Switzerland, nestled between the towns of Thun and Interlaken. With an area of about 48.3 square kilometers and a maximum depth of 217 meters, it is a popular destination for water sports, sailing, and sightseeing. The water in Lake Thun comes from surrounding glaciers and rivers, which contributes to its cold, crystal-clear nature.
The water temperature in Lake Thun varies significantly depending on the season. In winter, the temperature can drop close to 4°C, while in summer, it can reach around 20°C, making it ideal for swimming during warmer months. However, even in summer, the water may feel cool due to the lake's depth and inflows from cold mountain streams.