Kajaani — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Kajaani, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Kajaani today is 11.3°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 |
|---|---|---|---|
| SEP 13 | 13.0°C | 13.0°C | |
| SEP 14 | 12.8°C | 13.0°C | |
| SEP 15 | 12.5°C | 13.0°C | |
| SEP 16 | 12.3°C | 13.0°C | |
| SEP 17 | 12.0°C | 13.0°C | |
| SEP 18 | 11.7°C | 13.0°C | |
| SEP 19 | 11.6°C | 13.0°C | |
| SEP 20 | 11.4°C | 13.0°C | |
| SEP 21 | 13.0°C | 11.4°C | |
| SEP 22 | 13.0°C | 11.5°C | |
| SEP 23 | 13.0°C | 11.6°C | |
| SEP 24 | 13.0°C | 11.6°C | |
| SEP 25 | 13.0°C | 11.7°C | |
| SEP 26 | 13.0°C | 11.8°C | |
| SEP 27 | 13.0°C | 11.9°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 | 4°C |
| February | 0°C | 2°C | 4°C |
| March | 0°C | 3°C | 6°C |
| April | 0°C | 2°C | 5°C |
| May | 2°C | 7°C | 13°C |
| June | 9°C | 14°C | 19°C |
| July | 13°C | 18°C | 23°C |
| August | 12°C | 17°C | 22°C |
| September | 8°C | 13°C | 18°C |
| October | 4°C | 8°C | 11°C |
| November | 1°C | 5°C | 8°C |
| December | 0°C | 2°C | 5°C |
Kajaani: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Kajaani, the regional capital of Kainuu in eastern Finland, is surrounded by lakes and rivers, including the Kajaaninjoki River and the nearby Lake Oulujärvi. The area’s inland water temperatures vary strongly through the seasons due to its northern location. In spring, after the ice melts, the surface water in lakes and rivers remains cold, around 4–7 °C (39–45 °F). By early summer, temperatures rise to 14–17 °C (57–63 °F), and in July the water typically reaches 18–21 °C (64–70 °F). During heatwaves, sheltered and shallow places can briefly warm to 22–23 °C (72–73 °F). In autumn, the temperature drops below 10 °C (50 °F), and most lakes freeze by November.
Swimming in Kajaani’s lakes and rivers is allowed and common during the short northern summer. The water is clean, and several maintained beaches, such as those on Lake Oulujärvi and along the Kajaaninjoki, provide easy access. The water warms enough in mid-summer to allow comfortable swimming, especially for those who enjoy fresh, clear lake water. Locals and visitors use the riverside and lake beaches for open-water swimming, sunbathing, and recreation, while winter swimming in ice holes also attracts enthusiasts during the colder months.