Hiidenvesi — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Hiidenvesi, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Hiidenvesi today is 10.6°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 50°F (10°C) to 54°F (12°C). The water is slightly warmer, but still cool for most people. Swimming in such conditions is possible, but for most people, the time spent in the water should be limited to avoid hypothermia. Even experienced swimmers may feel discomfort if they stay in the water for too long. To improve comfort and safety, a wetsuit 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 | 11.8°C | 9.0°C | |
| OCT 5 | 11.9°C | 9.0°C | |
| OCT 6 | 11.6°C | 9.0°C | |
| OCT 7 | 11.6°C | 9.0°C | |
| OCT 8 | 11.7°C | 9.0°C | |
| OCT 9 | 11.7°C | 9.0°C | |
| OCT 10 | 10.8°C | 9.0°C | |
| OCT 11 | 10.6°C | 9.0°C | |
| OCT 12 | 9.0°C | 10.5°C | |
| OCT 13 | 9.0°C | 10.4°C | |
| OCT 14 | 9.0°C | 10.4°C | |
| OCT 15 | 9.0°C | 10.3°C | |
| OCT 16 | 9.0°C | 10.2°C | |
| OCT 17 | 9.0°C | 10.1°C | |
| OCT 18 | 9.0°C | 10.0°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 | 2°C | 5°C |
| February | 0°C | 2°C | 5°C |
| March | 0°C | 3°C | 6°C |
| April | 1°C | 5°C | 8°C |
| May | 5°C | 11°C | 17°C |
| June | 11°C | 18°C | 23°C |
| July | 13°C | 19°C | 24°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 |
Hiidenvesi: Water Temperature by Location
Hiidenvesi: Weather Forecast
October 11
October 12
October 13
October 14
October 15
Location & Local Information
Hiidenvesi is a large, fragmented lake in the Uusimaa region, spanning several municipalities including Vihti and Lohja. Swimming is widely permissible along its extensive shores and at any local public beaches, a right safeguarded by Finland's Everyman’s Rights. This fundamental principle ensures the public can access and use natural water bodies for recreation without prior permission. Despite facing some challenges with eutrophication in certain bays, official public bathing sites on Hiidenvesi are regularly monitored by municipal environmental health services to ensure the water quality and hygiene remain suitable for swimming during the summer.
The water temperature in Hiidenvesi follows the pronounced seasonal cycle typical of Southern Finnish lakes, with a long period of ice cover. During the cold winter season, generally from December to April, the lake is reliably frozen, with water temperatures beneath the ice remaining consistently near the freezing point, between 0∘C and 4∘C. The most comfortable period for swimming is in the surface layer during July, when sun-warmed bays and shallow areas typically see temperatures ranging from 18∘C to 21∘C. However, due to the lake's size and variable depth, cold upwelling and wind can cause sudden temperature drops. Outside of the warm summer peak, the water is generally too cold for casual bathers.