Lahnajärvi — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lahnajärvi, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lahnajärvi today is 15°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 |
|---|---|---|---|
| JUN 3 | 12.6°C | 18.0°C | |
| JUN 4 | 12.9°C | 18.0°C | |
| JUN 5 | 14.1°C | 18.0°C | |
| JUN 6 | 14.1°C | 18.0°C | |
| JUN 7 | 14.4°C | 18.0°C | |
| JUN 8 | 14.4°C | 18.0°C | |
| JUN 10 | 14.6°C | 18.0°C | |
| JUN 11 | 18.0°C | 15.2°C | |
| JUN 12 | 18.0°C | 15.3°C | |
| JUN 13 | 18.0°C | 15.5°C | |
| JUN 14 | 18.0°C | 15.6°C | |
| JUN 15 | 18.0°C | 15.8°C | |
| JUN 16 | 18.0°C | 15.9°C | |
| JUN 17 | 18.0°C | 16.1°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 | 12°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 |
Lahnajärvi: Water Temperature by Location
Lahnajärvi: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Lahnajärvi is a small, relatively shallow lake in the Southwest Finland region, historically known as a popular roadside rest area on the old Helsinki-Turku highway. Swimming is generally permitted along its shores and at designated public access points, a right secured by Finland's Everyman’s Rights. This principle grants the public the freedom to use natural water bodies for recreational use. Given its location and history as a leisure stop, the lake has accessible shores and a monitored swimming area. Water quality is maintained and checked by local authorities, ensuring it remains safe and hygienic for bathing during the summer season.
As a small, sheltered lake, Lahnajärvi is prone to heating up rapidly during warm weather but also cools down quickly. During the winter, typically from December to April, the lake is reliably frozen, with water temperatures beneath the ice layer consistently resting between 0∘C and 4∘C. The season for comfortable surface swimming is short, peaking in July. During this mid-summer month, surface temperatures in the shallow nearshore areas often range from 19∘C to 23∘C, sometimes climbing higher in exceptionally warm weather, making it one of the warmer swimming locations in the region. Outside of the brief summer peak, the water is too cool for casual swimming.