Mjörn Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Mjörn Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Mjörn Lake 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 |
|---|---|---|---|
| JUN 23 | 16.4°C | 19.0°C | |
| JUN 24 | 16.4°C | 19.0°C | |
| JUN 25 | 16.6°C | 19.0°C | |
| JUN 26 | 17.6°C | 19.0°C | |
| JUN 27 | 17.6°C | 19.0°C | |
| JUN 28 | 17.6°C | 19.0°C | |
| JUN 29 | 17.7°C | 19.0°C | |
| JUN 30 | 19.6°C | 19.0°C | |
| JUL 1 | 21.0°C | 19.7°C | |
| JUL 2 | 21.0°C | 19.7°C | |
| JUL 3 | 21.0°C | 19.8°C | |
| JUL 4 | 21.0°C | 19.9°C | |
| JUL 5 | 21.0°C | 20.0°C | |
| JUL 6 | 21.0°C | 20.0°C | |
| JUL 7 | 21.0°C | 20.1°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 | 2°C | 5°C |
| March | 0°C | 4°C | 7°C |
| April | 4°C | 8°C | 11°C |
| May | 9°C | 14°C | 20°C |
| June | 13°C | 19°C | 24°C |
| July | 16°C | 21°C | 26°C |
| August | 14°C | 20°C | 25°C |
| September | 10°C | 15°C | 21°C |
| October | 6°C | 10°C | 13°C |
| November | 3°C | 7°C | 10°C |
| December | 1°C | 5°C | 8°C |
Mjörn Lake: Water Temperature by Location
Mjörn Lake: Weather Forecast
July 1
July 2
July 3
July 4
Location & Local Information
Mjörn (Swedish: Mjörn) in Västra Götaland County is a temperate freshwater lake whose surface temperatures vary considerably through the year. In spring the water commonly warms from roughly 3–10 °C (37–50 °F) as ice melts and seasonal warming begins. Peak summer temperatures in July and August often reach about 15–24 °C (59–75 °F), though cooler summers can keep the water nearer 12–18 °C (54–64 °F). In autumn the lake cools back to roughly 5–15 °C (41–59 °F) as air temperatures fall, and in winter surface water is close to freezing where it remains unfrozen, around 0–4 °C (32–39 °F), while parts of the lake may ice over.
Swimming in Mjörn is generally allowed and commonly practiced, supported by Sweden’s public right of access (Allemansrätten) and the lake’s accessibility from public shorelines. Recreational bathing is popular in summer when temperatures are most comfortable, and there are often informal spots used for swimming; local authorities may also monitor water quality at designated bathing sites. Swimmers should heed signage, be mindful of boat traffic and currents near inlets or outlets, and take extra precautions with cold or early/late season swims. Winter bathing or ice swimming is possible but requires careful safety measures and local knowledge.