Ånnsjön — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Ånnsjön, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Ånnsjön today is 20.6°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 23 | 17.5°C | 19.0°C | |
| JUN 24 | 17.5°C | 19.0°C | |
| JUN 25 | 17.5°C | 19.0°C | |
| JUN 26 | 19.0°C | 19.0°C | |
| JUN 27 | 19.0°C | 19.0°C | |
| JUN 28 | 19.0°C | 19.0°C | |
| JUN 29 | 20.0°C | 19.0°C | |
| JUN 30 | 20.6°C | 19.0°C | |
| JUL 1 | 21.0°C | 20.6°C | |
| JUL 2 | 21.0°C | 20.6°C | |
| JUL 3 | 21.0°C | 20.7°C | |
| JUL 4 | 21.0°C | 20.7°C | |
| JUL 5 | 21.0°C | 20.7°C | |
| JUL 6 | 21.0°C | 20.7°C | |
| JUL 7 | 21.0°C | 20.7°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 | 3°C | 6°C |
| February | 0°C | 3°C | 6°C |
| March | 0°C | 4°C | 7°C |
| April | 4°C | 8°C | 11°C |
| May | 8°C | 13°C | 19°C |
| June | 13°C | 19°C | 24°C |
| July | 16°C | 21°C | 26°C |
| August | 14°C | 20°C | 25°C |
| September | 11°C | 17°C | 22°C |
| October | 6°C | 10°C | 13°C |
| November | 3°C | 7°C | 10°C |
| December | 0°C | 4°C | 7°C |
Ånnsjön: Water Temperature by Location
Ånnsjön: Weather Forecast
July 1
July 2
July 3
July 4
Location & Local Information
Ånnsjön (Ånnsjön) in Jämtland County typically shows clear seasonal variation in water temperature. In spring the surface waters are cold as ice melts, often ranging from around 0 to 10 °C (32 to 50 °F). During summer, on warmer days the lake commonly warms to roughly 12–20 °C (54–68 °F), though brief heat spells can push surface readings a bit higher. In autumn the temperature falls again, often sitting between about 5 and 12 °C (41 to 54 °F) as cooling weather and shorter days set in. Winter temperatures approach freezing and the lake frequently forms ice; beneath the ice waters are near 0–4 °C (32–39 °F) until thaw.
Swimming in Ånnsjön is generally possible where there is public access, but there are practical and regulatory considerations. The lake and surrounding wetlands are important for birdlife and parts may be protected or have access restrictions at certain times, so local rules should be checked before visiting. Even in summer the water can be chilly compared with southern latitudes, so swimmers should be aware of cold-water shock and wear appropriate protection such as a wetsuit if needed. In winter, ice conditions must be judged carefully and swimming under or through ice is hazardous; for safety and conservation reasons it is best to follow local guidance.