Lake Käsmu — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Käsmu, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Käsmu today is 10°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 47°F (8°C) to 50°F (10°C). This is still cool water, suitable only for experienced swimmers or those accustomed to cold water. Swimming in such conditions is possible, but not recommended for prolonged periods. Extra caution should be taken during extended exposure, as the cold water can cause heat loss and lead to hypothermia. For added comfort, special clothing can be used. 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 4 | 10.8°C | 11.0°C | |
| OCT 5 | 10.4°C | 11.0°C | |
| OCT 6 | 10.6°C | 11.0°C | |
| OCT 7 | 10.9°C | 11.0°C | |
| OCT 8 | 10.9°C | 11.0°C | |
| OCT 9 | 10.9°C | 11.0°C | |
| OCT 10 | 10.1°C | 11.0°C | |
| OCT 11 | 10.0°C | 11.0°C | |
| OCT 12 | 11.0°C | 10.1°C | |
| OCT 13 | 11.0°C | 10.1°C | |
| OCT 14 | 11.0°C | 10.2°C | |
| OCT 15 | 11.0°C | 10.2°C | |
| OCT 16 | 11.0°C | 10.3°C | |
| OCT 17 | 11.0°C | 10.3°C | |
| OCT 18 | 11.0°C | 10.4°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 | 3°C | 6°C |
| February | 0°C | 3°C | 6°C |
| March | 0°C | 4°C | 7°C |
| April | 3°C | 8°C | 11°C |
| May | 7°C | 13°C | 18°C |
| June | 13°C | 19°C | 24°C |
| July | 16°C | 22°C | 27°C |
| August | 17°C | 22°C | 27°C |
| September | 12°C | 18°C | 23°C |
| October | 7°C | 11°C | 14°C |
| November | 2°C | 6°C | 10°C |
| December | 0°C | 4°C | 7°C |
Lake Käsmu: Water Temperature by Location
Lake Käsmu: Weather Forecast
October 12
October 13
October 14
October 15
October 16
Location & Local Information
Käsmu järv typically follows the seasonal rhythms of small northern Estonian coastal lakes. In early spring the surface temperature is often close to freezing, around 0–6 °C (32–43 °F), rising through late spring to roughly 6–12 °C (43–54 °F). During summer the lake commonly reaches 15–22 °C (59–72 °F) on warm days, though shallow areas warm faster and sheltered spots can be a degree or two warmer. In autumn temperatures decline back toward 5–12 °C (41–54 °F) before the lake refreezes; winter conditions commonly bring surface ice and water near 0 °C (32 °F). Local weather, depth and wind exposure influence these ranges, so actual conditions vary year to year.
Swimming in Käsmu järv is generally allowed and is a traditional recreational activity for residents and visitors in the warmer months because the lake is accessible and shallow areas provide easy entry. However, swimmers should be aware that water can remain cool even in summer and that conditions change rapidly; hypothermia risk is real in cold water. During winter the ice makes ordinary swimming impossible and only experienced, properly equipped people should attempt ice bathing under safe, supervised conditions. It is sensible to observe any local advisories about water quality or access before entering.