Jääsjärvi — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Jääsjärvi, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Jääsjärvi today is 13.4°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature 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 Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| SEP 14 | 14.4°C | 17.0°C | |
| SEP 15 | 14.4°C | 17.0°C | |
| SEP 16 | 14.0°C | 17.0°C | |
| SEP 17 | 13.8°C | 17.0°C | |
| SEP 18 | 13.8°C | 17.0°C | |
| SEP 19 | 13.8°C | 17.0°C | |
| SEP 20 | 13.6°C | 17.0°C | |
| SEP 21 | 13.4°C | 17.0°C | |
| SEP 22 | 17.0°C | 13.6°C | |
| SEP 23 | 17.0°C | 13.8°C | |
| SEP 24 | 17.0°C | 13.9°C | |
| SEP 25 | 17.0°C | 14.1°C | |
| SEP 26 | 17.0°C | 14.3°C | |
| SEP 27 | 17.0°C | 14.5°C | |
| SEP 28 | 17.0°C | 14.7°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 | 0°C | 3°C | 6°C |
| February | 0°C | 2°C | 5°C |
| March | 0°C | 2°C | 5°C |
| April | 0°C | 4°C | 7°C |
| May | 5°C | 10°C | 15°C |
| June | 10°C | 15°C | 21°C |
| July | 14°C | 20°C | 25°C |
| August | 14°C | 20°C | 25°C |
| September | 11°C | 17°C | 22°C |
| October | 5°C | 9°C | 12°C |
| November | 1°C | 5°C | 8°C |
| December | 0°C | 3°C | 6°C |
Jääsjärvi: Water Temperature by Location
Jääsjärvi: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Lake Jääsjärvi, located in the Päijät-Häme region of southern Finland, is a large and deep lake known for its clear water and natural beauty. The water temperature varies considerably through the year, reflecting Finland’s distinct seasons. In spring, after the ice cover melts, the temperature remains low at around 5–8 °C (41–46 °F). During early summer, the surface warms to 14–17 °C (57–63 °F), and by July the lake typically reaches 19–22 °C (66–72 °F). In sheltered coves, the temperature can occasionally rise to 23–24 °C (73–75 °F). By October, it cools below 10 °C (50 °F), and freezing usually begins in late November.
Swimming in Jääsjärvi is officially allowed and widely enjoyed. The lake’s water is clean, and the surrounding nature offers peaceful settings for bathing. Several small beaches and piers are used for swimming, especially during July and August when the water is at its warmest. The good water quality and moderate temperatures make it suitable for open-water swimming, canoeing, and relaxation. In winter, some locals practice ice swimming in designated areas near saunas.