Uljua Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Uljua Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Uljua Reservoir today is 15.9°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 |
|---|---|---|---|
| JUN 3 | 12.3°C | 14.0°C | |
| JUN 4 | 12.3°C | 14.0°C | |
| JUN 5 | 13.2°C | 14.0°C | |
| JUN 6 | 13.2°C | 14.0°C | |
| JUN 7 | 14.3°C | 14.0°C | |
| JUN 8 | 14.4°C | 14.0°C | |
| JUN 10 | 15.3°C | 14.0°C | |
| JUN 11 | 14.0°C | 15.8°C | |
| JUN 12 | 14.0°C | 15.7°C | |
| JUN 13 | 14.0°C | 15.6°C | |
| JUN 14 | 14.0°C | 15.5°C | |
| JUN 15 | 14.0°C | 15.4°C | |
| JUN 16 | 14.0°C | 15.3°C | |
| JUN 17 | 14.0°C | 15.2°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 | 0°C | 4°C |
| February | 0°C | 0°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 |
Uljua Reservoir: Water Temperature by Location
Uljua Reservoir: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Uljua Reservoir (Uljuan tekojärvi) is a significant artificial lake in the Siikalatva municipality of North Ostrobothnia. As with all major water bodies in Finland, swimming is legally permitted along its accessible shores, in accordance with the national Everyman’s Rights. However, due to its function as a reservoir and its fluctuating water levels, caution is strongly advised when swimming outside of official, maintained bathing spots. The water quality is generally suitable for swimming during the season.
The reservoir’s northern location means its water temperature is seasonal and generally cool. The water body is typically frozen over during the long winter months, from approximately November to May, with the water below the ice remaining at a consistent and very cold temperature, between 0∘C and 4∘C. The most comfortable period for surface swimming is brief, limited mainly to July, when the surface temperature can rise to an approximate range of 18∘C to 22∘C in shallow bays. Outside of this summer peak, the water quickly becomes too cold for casual recreation, appealing only to dedicated cold-water enthusiasts.