Ljusnan River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Ljusnan River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Ljusnan River today is 18.7°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 |
|---|---|---|---|
| AUG 3 | 19.1°C | 17.0°C | |
| AUG 4 | 19.2°C | 17.0°C | |
| AUG 5 | 19.0°C | 17.0°C | |
| AUG 6 | 19.1°C | 17.0°C | |
| AUG 7 | 19.1°C | 17.0°C | |
| AUG 8 | 19.1°C | 17.0°C | |
| AUG 9 | 18.7°C | 17.0°C | |
| AUG 10 | 18.7°C | 17.0°C | |
| AUG 11 | 17.0°C | 18.6°C | |
| AUG 12 | 17.0°C | 18.5°C | |
| AUG 13 | 17.0°C | 18.4°C | |
| AUG 14 | 17.0°C | 18.4°C | |
| AUG 15 | 17.0°C | 18.3°C | |
| AUG 16 | 17.0°C | 18.2°C | |
| AUG 17 | 17.0°C | 18.1°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 | 5°C |
| February | 0°C | 1°C | 4°C |
| March | 0°C | 1°C | 4°C |
| April | 0°C | 4°C | 8°C |
| May | 4°C | 9°C | 13°C |
| June | 9°C | 13°C | 18°C |
| July | 12°C | 17°C | 21°C |
| August | 12°C | 17°C | 21°C |
| September | 9°C | 14°C | 18°C |
| October | 4°C | 8°C | 10°C |
| November | 0°C | 4°C | 7°C |
| December | 0°C | 2°C | 5°C |
Ljusnan River: Water Temperature by Location
Ljusnan River: Weather Forecast
August 11
August 12
August 13
August 14
August 15
Location & Local Information
Mouth Bothnian Sea
• coordinates 61°12′12″N 17°07′57″E
• elevation 0 m (0 ft)
Length 430 km (270 mi)
The Ljusnan in Dalarna County is a northern European river whose water temperature changes markedly with the seasons and local conditions. During summer, shallow and slow-moving stretches and adjacent lakes can warm to roughly 15–22 °C (59–72 °F), while the main channel often stays cooler around 10–18 °C (50–64 °F). In spring, snowmelt and high flows typically keep temperatures low, often in the 0–6 °C (32–43 °F) range, and in autumn the river cools to about 5–10 °C (41–50 °F). Winter conditions bring temperatures close to freezing, frequently 0–2 °C (32–36 °F) in open water and ice cover in many places. Local weather, depth, flow speed and inflowing lakes all affect these figures, so conditions can vary from one spot to another.
Swimming in the Ljusnan is permitted in many places and is a common summer activity in calm bays and shallower reaches, but it is not universally safe. Strong currents, sudden drops, and regulated releases from hydroelectric plants can create hazardous conditions, and cold-water shock is a real risk outside the warmest months. Bathing spots with gentle shorelines are the safest for families, while wetsuits or short swims are advisable in cooler water. Observing local signs, choosing sheltered areas and being aware of current and weather are important for safe swimming.