Mangen Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Mangen Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Mangen Lake today is 18.7°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 |
|---|---|---|---|
| JUL 14 | 19.4°C | 22.0°C | |
| JUL 15 | 19.7°C | 22.0°C | |
| JUL 16 | 19.7°C | 22.0°C | |
| JUL 17 | 20.6°C | 22.0°C | |
| JUL 18 | 20.6°C | 22.0°C | |
| JUL 19 | 20.4°C | 22.0°C | |
| JUL 20 | 20.4°C | 22.0°C | |
| JUL 21 | 18.7°C | 22.0°C | |
| JUL 22 | 22.0°C | 18.9°C | |
| JUL 23 | 22.0°C | 19.0°C | |
| JUL 24 | 22.0°C | 19.2°C | |
| JUL 25 | 22.0°C | 19.4°C | |
| JUL 26 | 22.0°C | 19.5°C | |
| JUL 27 | 22.0°C | 19.7°C | |
| JUL 28 | 22.0°C | 19.9°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 | 2°C | 7°C | 11°C |
| May | 7°C | 12°C | 18°C |
| June | 11°C | 18°C | 24°C |
| July | 16°C | 22°C | 27°C |
| August | 17°C | 22°C | 27°C |
| September | 12°C | 18°C | 23°C |
| October | 7°C | 11°C | 14°C |
| November | 3°C | 7°C | 10°C |
| December | 0°C | 4°C | 7°C |
Mangen Lake: Water Temperature by Location
Mangen Lake: Weather Forecast
July 22
July 23
July 24
July 25
Location & Local Information
Mangen, a freshwater lake in the Akershus area of southeastern Norway, experiences marked seasonal shifts in surface water temperature. In summer months (June–August) surface temperatures commonly range from about 15–22 °C (59–72 °F), and during warm spells can approach the low to mid‑20s °C (mid‑70s °F). Spring (April–May) brings cooler water, roughly 3–12 °C (37–54 °F) as ice melts and the lake stratifies, while autumn (September–October) typically sees surface temperatures fall to around 6–15 °C (43–59 °F). In winter the lake often freezes or hovers close to 0–4 °C (32–39 °F) beneath any ice cover, making open‑water swimming impractical without special cold‑water preparations.
Swimming in Mangen is generally allowed and common during the warmer months because Norway’s right to roam (allemannsretten) provides public access to most shorelines, and the lake’s rural setting often means good water quality. Still, recreational users should exercise caution: there are few lifeguards, sudden cold shock can occur outside peak summer temperatures, and occasional algal blooms or local restrictions near private properties or boating areas may apply. In winter, ice swimming is practiced by some with proper equipment and safety measures, but normal swimming is not recommended when the lake is frozen.