Mjøsa Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Mjøsa Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Mjøsa Lake today is 11.6°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 50°F (10°C) to 54°F (12°C). The water is slightly warmer, but still cool for most people. Swimming in such conditions is possible, but for most people, the time spent in the water should be limited to avoid hypothermia. Even experienced swimmers may feel discomfort if they stay in the water for too long. To improve comfort and safety, a wetsuit can be used. 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 |
|---|---|---|---|
| SEP 14 | 12.8°C | 17.0°C | |
| SEP 15 | 12.7°C | 17.0°C | |
| SEP 16 | 12.5°C | 17.0°C | |
| SEP 17 | 12.2°C | 17.0°C | |
| SEP 18 | 12.0°C | 17.0°C | |
| SEP 19 | 12.0°C | 17.0°C | |
| SEP 20 | 11.8°C | 17.0°C | |
| SEP 22 | 17.0°C | 11.9°C | |
| SEP 23 | 17.0°C | 12.1°C | |
| SEP 24 | 17.0°C | 12.4°C | |
| SEP 25 | 17.0°C | 12.7°C | |
| SEP 26 | 17.0°C | 13.0°C | |
| SEP 27 | 17.0°C | 13.2°C | |
| SEP 28 | 17.0°C | 13.5°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 | 3°C | 6°C |
| April | 1°C | 5°C | 8°C |
| May | 6°C | 11°C | 17°C |
| June | 10°C | 17°C | 23°C |
| July | 13°C | 19°C | 24°C |
| August | 14°C | 20°C | 25°C |
| September | 11°C | 17°C | 22°C |
| October | 5°C | 9°C | 12°C |
| November | 1°C | 5°C | 8°C |
| December | 0°C | 3°C | 6°C |
Mjøsa Lake: Water Temperature by Location
Mjøsa Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Mjøsa, located by the Akershus area of Norway, shows clear seasonal variation in water temperature that reflects local climate and depth. In winter the surface often approaches freezing and parts of the lake can be ice-covered, with temperatures around 0–4 °C (32–39 °F) beneath the ice. Spring sees a gradual rise, typically 3–10 °C (37–50 °F), while early summer brings surface temperatures of roughly 12–18 °C (54–64 °F). Peak summer values in July and August usually range from 16–22 °C (61–72 °F) and can reach about 24 °C (75 °F) during warm spells. Autumn cooling returns surface levels to about 8–14 °C (46–57 °F). Temperatures vary with depth, wind, and inflow, so local conditions may differ from these averages.
Swimming in Mjøsa is generally permitted and popular because shorelines are publicly accessible and many municipalities maintain beaches and facilities. Water quality is monitored and is often suitable for bathing in summer, though occasional algal blooms, runoff after heavy rain, or boat traffic can affect safety and enjoyment. Winter swimming and ice bathing are practised by some but carry clear risks; anyone entering cold water should be prepared for cold-shock, wear suitable protection, and follow local safety guidance.