Kallsjön — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Kallsjön, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Kallsjön today is 0.9°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges less than 41°F (5°C). Such water is extremely cold and not recommended for swimming without proper preparation. In these conditions, the risk of hypothermia is very high, and prolonged exposure to the water can be hazardous to your health. If you decide to swim, it is important to have the appropriate gear, such as a wetsuit. Typically, only experienced swimmers or those who practice winter swimming venture into such waters. 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 |
|---|---|---|---|
| APR 11 | 0.5°C | 2.0°C | |
| APR 12 | 0.5°C | 2.0°C | |
| APR 13 | 0.5°C | 2.0°C | |
| APR 14 | 0.6°C | 2.0°C | |
| APR 15 | 0.6°C | 2.0°C | |
| APR 16 | 0.9°C | 2.0°C | |
| APR 17 | 0.9°C | 2.0°C | |
| APR 18 | 0.9°C | 2.0°C | |
| APR 19 | 2.0°C | 1.0°C | |
| APR 20 | 2.0°C | 1.0°C | |
| APR 21 | 2.0°C | 1.1°C | |
| APR 22 | 2.0°C | 1.1°C | |
| APR 23 | 2.0°C | 1.2°C | |
| APR 24 | 2.0°C | 1.2°C | |
| APR 25 | 2.0°C | 1.3°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 | 2°C | 4°C |
| April | 0°C | 2°C | 4°C |
| May | 2°C | 7°C | 12°C |
| June | 10°C | 15°C | 21°C |
| July | 13°C | 19°C | 24°C |
| August | 11°C | 17°C | 22°C |
| September | 7°C | 12°C | 18°C |
| October | 3°C | 7°C | 10°C |
| November | 0°C | 2°C | 5°C |
| December | 0°C | 2°C | 4°C |
Kallsjön: Water Temperature by Location
Kallsjön: Weather Forecast
April 19
April 20
April 21
April 22
Location & Local Information
Kallsjön, a lake in Jämtland County, typically has cold to cool water for much of the year because of its northern location and elevation. In spring (April–May) surface temperatures often range from about 2–10 °C (36–50 °F) as the ice thaws and the lake mixes. In summer (June–August) the warmest period, surface temperatures commonly reach 12–22 °C (54–72 °F), with sheltered bays warming fastest on sunny days. In autumn (September–October) the water cools to roughly 5–12 °C (41–54 °F) as air temperatures fall, and in winter the surface is typically at or just above freezing, about 0–1 °C (32–34 °F) beneath ice cover where present.
Swimming in Kallsjön is generally allowed; Sweden’s right of public access and the absence of widespread prohibitions mean people commonly swim there in summer when temperatures are most comfortable. Caution is important year-round because there are usually no lifeguards, water can be cold even in summer at depth, and cold-water shock is a real risk in spring and autumn. Ice swimming is practiced by some in winter but should only be attempted with proper experience, safety equipment and local knowledge of ice thickness. Always respect local signs and private shoreline access rules.