Grimselsee — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Grimselsee, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Grimselsee today is 4.2°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges less than 41°F (5°C). Such water is extremely cold and not recommended for swimming without proper preparation. In these conditions, the risk of hypothermia is very high, and prolonged exposure to the water can be hazardous to your health. If you decide to swim, it is important to have the appropriate gear, such as a wetsuit. Typically, only experienced swimmers or those who practice winter swimming venture into such waters. 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 |
|---|---|---|---|
| OCT 24 | 3.5°C | 4.5°C | |
| OCT 25 | 3.5°C | 4.5°C | |
| OCT 26 | 3.8°C | 4.5°C | |
| OCT 27 | 3.2°C | 4.5°C | |
| OCT 28 | 3.7°C | 4.5°C | |
| OCT 29 | 3.7°C | 4.5°C | |
| OCT 30 | 3.3°C | 4.5°C | |
| OCT 31 | 4.2°C | 4.5°C | |
| NOV 1 | 0.6°C | 4.0°C | |
| NOV 2 | 0.6°C | 3.8°C | |
| NOV 3 | 0.6°C | 3.7°C | |
| NOV 4 | 0.6°C | 3.5°C | |
| NOV 5 | 0.6°C | 3.3°C | |
| NOV 6 | 0.6°C | 3.1°C | |
| NOV 7 | 0.6°C | 2.9°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 | 0°C | 1°C | 1°C |
| February | 0°C | 0°C | 0°C |
| March | 0°C | 1°C | 1°C |
| April | 0°C | 5°C | 9°C |
| May | 3°C | 10°C | 16°C |
| June | 6°C | 14°C | 22°C |
| July | 14°C | 19°C | 24°C |
| August | 14°C | 20°C | 25°C |
| September | 9°C | 12°C | 17°C |
| October | 0°C | 5°C | 9°C |
| November | 0°C | 1°C | 6°C |
| December | 0°C | 1°C | 1°C |
Grimselsee: Water Temperature by Location
Grimselsee: Weather Forecast
November 1
November 2
November 3
November 4
Location & Local Information
Type: artificial lake, hydroelectric reservoir
Primary inflows: Oberaarbach [de], Treibtenbach
Primary outflows: Aare
Catchment area: 74.4 km2 (28.7 sq mi)
Basin countries: Switzerland
Surface area: 2.63 km2 (1.02 sq mi)
Water volume: 95 million cubic metres (77,000 acre⋅ft)
Surface elevation: 1,908 m (6,260 ft)
Grimselsee is an artificial reservoir located in the Bernese Alps in Switzerland, near the Grimsel Pass. It is formed by the Grimsel Dam and is part of a larger hydroelectric system. The lake, with its striking turquoise waters, is surrounded by dramatic alpine landscapes and attracts hikers and nature enthusiasts. Due to its high altitude (around 1,900 meters), the water temperature in Grimselsee stays cold year-round, typically ranging from 4°C to 10°C (39°F to 50°F) during summer, making swimming very uncommon.