Lake Oulu — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Oulu, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Oulu today is 19.5°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 | 20.0°C | 19.0°C | |
| JUL 15 | 20.7°C | 19.0°C | |
| JUL 16 | 20.7°C | 19.0°C | |
| JUL 17 | 20.9°C | 19.0°C | |
| JUL 18 | 21.2°C | 19.0°C | |
| JUL 19 | 20.6°C | 19.0°C | |
| JUL 20 | 20.6°C | 19.0°C | |
| JUL 21 | 19.4°C | 19.0°C | |
| JUL 22 | 19.0°C | 19.5°C | |
| JUL 23 | 19.0°C | 19.5°C | |
| JUL 24 | 19.0°C | 19.4°C | |
| JUL 25 | 19.0°C | 19.4°C | |
| JUL 26 | 19.0°C | 19.4°C | |
| JUL 27 | 19.0°C | 19.4°C | |
| JUL 28 | 19.0°C | 19.3°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 | 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 | 12°C |
| June | 9°C | 14°C | 20°C |
| July | 13°C | 19°C | 24°C |
| August | 12°C | 18°C | 23°C |
| September | 8°C | 13°C | 19°C |
| October | 4°C | 8°C | 11°C |
| November | 1°C | 5°C | 8°C |
| December | 0°C | 2°C | 5°C |
Lake Oulu: Water Temperature by Location
Lake Oulu: Weather Forecast
July 22
July 23
July 24
July 25
July 26
July 27
Location & Local Information
Lake Oulujärvi, located in the Kainuu region of eastern Finland, is the country’s fifth-largest lake and is often called “the sea of Kainuu” because of its vast open waters. Its size and depth cause the water temperature to change slowly throughout the year. In spring, after the ice melts, the surface temperature is about 4–7 °C (39–45 °F). By early summer, it rises to 14–17 °C (57–63 °F), and in July, during the warmest weeks, the surface water typically reaches 18–21 °C (64–70 °F). In calm, shallow bays the temperature can briefly rise to 22–23 °C (72–73 °F). In autumn, the lake cools below 10 °C (50 °F) and begins to freeze in late November or early December.
Swimming in Lake Oulujärvi is allowed and widely enjoyed, particularly near Vaala and Paltaniemi, where long sandy beaches make access easy. The water is clean, and the open landscape gives the feeling of swimming by the sea. Despite the northern location, the lake warms to comfortable temperatures in July and August, making it suitable for open-water swimming and family recreation. Its clear water and calm bays provide ideal conditions for swimming, sailing, and enjoying nature during the short but pleasant Finnish summer.