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 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 | 20.3°C | 19.0°C | |
| JUL 15 | 20.8°C | 19.0°C | |
| JUL 16 | 20.8°C | 19.0°C | |
| JUL 17 | 20.8°C | 19.0°C | |
| JUL 18 | 21.3°C | 19.0°C | |
| JUL 19 | 20.7°C | 19.0°C | |
| JUL 20 | 20.7°C | 19.0°C | |
| JUL 21 | 19.5°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 | 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
July 22
July 23
July 24
July 25
July 26
July 27
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.