Grimselsee Current Water Temperature and Forecast

As of today, the minimum water temperature in the Grimselsee ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear.

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 for Grimselsee Over the Last 30 Days

Today the water temperature in Grimselsee is higher than the same day in previous years. The water temperature range here in September is from 9°C to 17°C. The water temperature has decreased over the past 7 days but has increased over the past month.

The forecasted water temperature values for Grimselsee are presented in the table below.

The actual water temperature values near the shore may differ by a few degrees from the stated values. For the development of the forecast, we use our own mathematical model that takes into account the current water temperature changes, historical data, and key weather trends, including wind strength and direction, and air temperature in each specific region.

Monthly Water Temperature Histogram for Grimselsee