Bysjön — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Bysjön, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Bysjön today is 20.5°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 |
|---|---|---|---|
| JUL 14 | 19.2°C | 21.0°C | |
| JUL 15 | 21.1°C | 21.0°C | |
| JUL 16 | 21.3°C | 21.0°C | |
| JUL 17 | 21.3°C | 21.0°C | |
| JUL 18 | 21.3°C | 21.0°C | |
| JUL 19 | 20.8°C | 21.0°C | |
| JUL 20 | 20.7°C | 21.0°C | |
| JUL 21 | 20.5°C | 21.0°C | |
| JUL 22 | 21.0°C | 20.5°C | |
| JUL 23 | 21.0°C | 20.6°C | |
| JUL 24 | 21.0°C | 20.6°C | |
| JUL 25 | 21.0°C | 20.6°C | |
| JUL 26 | 21.0°C | 20.6°C | |
| JUL 27 | 21.0°C | 20.7°C | |
| JUL 28 | 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 |
Bysjön: Water Temperature by Location
Bysjön: Weather Forecast
July 22
July 23
July 24
July 25
Location & Local Information
Bysjön in Östergötland County typically experiences modest seasonal variation in surface water temperature. In midsummer, surface temperatures commonly reach about 18–24 °C (64–75 °F), making the lake pleasant for bathing on warm days. Late spring and early summer are cooler, with temperatures often in the 5–15 °C (41–59 °F) range, while autumn sees a steady cooling back toward roughly 5–12 °C (41–54 °F). In winter the lake can approach freezing, with surface values around 0–4 °C (32–39 °F) where ice forms; under-ice conditions are considerably colder.
Swimming at Bysjön is generally allowed and regularly practiced, as public access to shorelines is a feature of Swedish outdoor life and local bathing spots are commonly used. However, swimmers should observe posted signs and local information because water quality can vary; summer algal blooms (cyanobacteria) or bacterial contamination after heavy rains can temporarily make swimming inadvisable. Cold water risks such as cold shock early and late in the season, and the dangers of thin ice in winter, mean that safety precautions and local guidance are important when deciding to enter the water.