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 19.6°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 | 19.4°C | 20.0°C | |
| AUG 4 | 19.6°C | 20.0°C | |
| AUG 5 | 19.8°C | 20.0°C | |
| AUG 6 | 19.7°C | 20.0°C | |
| AUG 7 | 19.7°C | 20.0°C | |
| AUG 8 | 19.7°C | 20.0°C | |
| AUG 9 | 19.6°C | 20.0°C | |
| AUG 10 | 19.6°C | 20.0°C | |
| AUG 11 | 20.0°C | 19.6°C | |
| AUG 12 | 20.0°C | 19.6°C | |
| AUG 13 | 20.0°C | 19.7°C | |
| AUG 14 | 20.0°C | 19.7°C | |
| AUG 15 | 20.0°C | 19.7°C | |
| AUG 16 | 20.0°C | 19.7°C | |
| AUG 17 | 20.0°C | 19.7°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
August 11
August 12
August 13
August 14
August 15
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.