Heinola — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Heinola, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Heinola today is 16.2°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 1 | 18.3°C | 17.0°C | |
| JUL 2 | 18.3°C | 17.0°C | |
| JUL 3 | 18.5°C | 17.0°C | |
| JUL 4 | 18.3°C | 17.0°C | |
| JUL 5 | 18.3°C | 17.0°C | |
| JUL 6 | 18.1°C | 17.0°C | |
| JUL 7 | 16.4°C | 17.0°C | |
| JUL 8 | 16.2°C | 17.0°C | |
| JUL 9 | 17.0°C | 16.2°C | |
| JUL 10 | 17.0°C | 16.3°C | |
| JUL 11 | 17.0°C | 16.3°C | |
| JUL 12 | 17.0°C | 16.4°C | |
| JUL 13 | 17.0°C | 16.4°C | |
| JUL 14 | 17.0°C | 16.4°C | |
| JUL 15 | 17.0°C | 16.5°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 | 1°C | 4°C |
| March | 0°C | 1°C | 4°C |
| April | 0°C | 3°C | 6°C |
| May | 4°C | 9°C | 13°C |
| June | 9°C | 14°C | 19°C |
| July | 12°C | 17°C | 21°C |
| August | 12°C | 17°C | 21°C |
| September | 9°C | 14°C | 18°C |
| October | 4°C | 8°C | 10°C |
| November | 0°C | 4°C | 7°C |
| December | 0°C | 2°C | 5°C |
Heinola: Weather Forecast
July 9
July 10
July 11
July 12
July 13
Location & Local Information
Heinola, located in the Päijät-Häme region of southern Finland, lies along the Kymijoki River, which flows from Lake Päijänne toward the Gulf of Finland. The river’s water is clean and clear, influenced by the large lake system upstream. In spring, after the ice melts in April, the water temperature in the Kymijoki around Heinola is still cold, usually between 4 and 7 °C (39–45 °F). During early summer, it rises to around 13–16 °C (55–61 °F), and in July, the warmest month, the surface temperature often reaches 18–21 °C (64–70 °F). On warm and sunny days, sheltered spots may briefly exceed 22 °C (72 °F). By September, the temperature cools below 10 °C (50 °F), and the river’s temperature remains low until the next spring.
Swimming in the Kymijoki River at Heinola is allowed and common during the summer. The water quality is generally good and suitable for bathing, with several maintained beaches and swimming areas within and near the town. The flow is gentle in most parts, making it safe for recreational swimming. While the water remains cool compared with Finland’s southern lakes, its clarity, steady flow, and natural beauty make Heinola an attractive spot for summer swimming and relaxation.