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 20.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 |
|---|---|---|---|
| JUL 14 | 19.5°C | 19.0°C | |
| JUL 15 | 20.8°C | 19.0°C | |
| JUL 16 | 20.9°C | 19.0°C | |
| JUL 17 | 21.2°C | 19.0°C | |
| JUL 18 | 21.8°C | 19.0°C | |
| JUL 19 | 21.9°C | 19.0°C | |
| JUL 20 | 21.9°C | 19.0°C | |
| JUL 21 | 21.3°C | 19.0°C | |
| JUL 22 | 19.0°C | 20.6°C | |
| JUL 23 | 19.0°C | 20.5°C | |
| JUL 24 | 19.0°C | 20.4°C | |
| JUL 25 | 19.0°C | 20.4°C | |
| JUL 26 | 19.0°C | 20.3°C | |
| JUL 27 | 19.0°C | 20.2°C | |
| JUL 28 | 19.0°C | 20.1°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
July 22
July 23
July 24
July 25
July 26
July 27
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.