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 21°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 | 20.4°C | 19.0°C | |
| JUL 16 | 20.6°C | 19.0°C | |
| JUL 17 | 21.0°C | 19.0°C | |
| JUL 18 | 21.6°C | 19.0°C | |
| JUL 19 | 22.0°C | 19.0°C | |
| JUL 20 | 21.9°C | 19.0°C | |
| JUL 21 | 21.0°C | 19.0°C | |
| JUL 22 | 19.0°C | 20.9°C | |
| JUL 23 | 19.0°C | 20.8°C | |
| JUL 24 | 19.0°C | 20.7°C | |
| JUL 25 | 19.0°C | 20.6°C | |
| JUL 26 | 19.0°C | 20.5°C | |
| JUL 27 | 19.0°C | 20.4°C | |
| JUL 28 | 19.0°C | 20.3°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
July 22
July 23
July 24
July 25
July 26
July 27
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.