Iijoki River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Iijoki River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Iijoki River today is 8.4°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 47°F (8°C) to 50°F (10°C). This is still cool water, suitable only for experienced swimmers or those accustomed to cold water. Swimming in such conditions is possible, but not recommended for prolonged periods. Extra caution should be taken during extended exposure, as the cold water can cause heat loss and lead to hypothermia. For added comfort, special clothing 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 | 10.4°C | 9.6°C | |
| SEP 14 | 10.1°C | 9.6°C | |
| SEP 15 | 10.1°C | 9.6°C | |
| SEP 16 | 9.8°C | 9.6°C | |
| SEP 17 | 9.6°C | 9.6°C | |
| SEP 18 | 8.6°C | 9.6°C | |
| SEP 19 | 8.8°C | 9.6°C | |
| SEP 20 | 8.6°C | 9.6°C | |
| SEP 21 | 9.6°C | 8.5°C | |
| SEP 22 | 9.6°C | 8.5°C | |
| SEP 23 | 9.6°C | 8.6°C | |
| SEP 24 | 9.6°C | 8.6°C | |
| SEP 25 | 9.6°C | 8.7°C | |
| SEP 26 | 9.6°C | 8.8°C | |
| SEP 27 | 9.6°C | 8.8°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 | 1°C | 2°C |
| February | 0°C | 1°C | 2°C |
| March | 0°C | 1°C | 2°C |
| April | 0°C | 2°C | 4°C |
| May | 1°C | 6°C | 12°C |
| June | 7°C | 12°C | 17°C |
| July | 11°C | 16°C | 21°C |
| August | 9°C | 14°C | 19°C |
| September | 5°C | 10°C | 15°C |
| October | 0°C | 3°C | 6°C |
| November | 0°C | 2°C | 5°C |
| December | 0°C | 2°C | 5°C |
Iijoki River: Water Temperature by Location
Iijoki River: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Source:
• location Iijärvi, Kuusamo
Mouth:
• location Gulf of Bothnia, Ii
• coordinates 65°19′23″N 25°21′30″E
Length 370 km (230 mi)
The Iijoki River, located in North Ostrobothnia, is one of Finland’s major rivers, heavily influenced by its northern position and the numerous hydroelectric power plants along its course. Swimming is permitted in designated areas, often at public beaches or accessible riverbanks, a right protected by Finland's Everyman’s Rights. However, river swimming requires caution due to potentially strong currents and the rapid changes in water flow caused by the power plant regulation. Designated bathing spots are the safest places to enter the water.
The water temperature of the Iijoki River follows a typical northern cycle, but the depth and current keep it generally cold. During the long winter, approximately from November to April, the river is largely ice-covered, with the water underneath the ice remaining near freezing, usually between 0∘C and 4∘C. The short period for comfortable surface swimming is generally limited to July. In this warmest month, the water temperature can reach a range of 16∘C to 20∘C in calmer, shallower areas. For the rest of the year, the river is significantly colder, only suitable for dedicated cold-water swimmers.