Altevatnet — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Altevatnet, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Altevatnet today is 2°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges less than 41°F (5°C). Such water is extremely cold and not recommended for swimming without proper preparation. In these conditions, the risk of hypothermia is very high, and prolonged exposure to the water can be hazardous to your health. If you decide to swim, it is important to have the appropriate gear, such as a wetsuit. Typically, only experienced swimmers or those who practice winter swimming venture into such waters. 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 |
|---|---|---|---|
| OCT 3 | 1.8°C | 5.0°C | |
| OCT 4 | 1.8°C | 5.0°C | |
| OCT 5 | 1.8°C | 5.0°C | |
| OCT 6 | 1.8°C | 5.0°C | |
| OCT 7 | 2.0°C | 5.0°C | |
| OCT 8 | 2.0°C | 5.0°C | |
| OCT 9 | 2.1°C | 5.0°C | |
| OCT 10 | 2.0°C | 5.0°C | |
| OCT 11 | 5.0°C | 2.2°C | |
| OCT 12 | 5.0°C | 2.3°C | |
| OCT 13 | 5.0°C | 2.5°C | |
| OCT 14 | 5.0°C | 2.6°C | |
| OCT 15 | 5.0°C | 2.8°C | |
| OCT 16 | 5.0°C | 2.9°C | |
| OCT 17 | 5.0°C | 3.1°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 | 2°C |
| February | 0°C | 2°C | 2°C |
| March | 0°C | 2°C | 2°C |
| April | 0°C | 2°C | 3°C |
| May | 0°C | 0°C | 6°C |
| June | 0°C | 5°C | 11°C |
| July | 5°C | 10°C | 15°C |
| August | 8°C | 13°C | 19°C |
| September | 5°C | 10°C | 15°C |
| October | 1°C | 5°C | 8°C |
| November | 0°C | 2°C | 3°C |
| December | 0°C | 2°C | 2°C |
Altevatnet: Water Temperature by Location
Altevatnet: Weather Forecast
October 11
October 12
October 13
October 14
October 15
Location & Local Information
Altevatnet is a large lake in Troms County (Altevatnet) whose surface temperatures are generally cool throughout the year because of its northern latitude, depth and inflow from mountain streams. In winter the lake is typically at or near the freezing point, with water temperatures close to 0 °C (32 °F) and large areas often ice-covered. In spring the surface warms slowly, commonly ranging from about 1–6 °C (34–43 °F) as snowmelt feeds cold water into the basin. Summer daytime surface temperatures more commonly reach roughly 8–16 °C (46–61 °F), with occasional short-lived highs toward 18–20 °C (64–68 °F) in unusually warm spells. In autumn the lake cools again, typically falling to 2–8 °C (36–46 °F) before freezing resumes.
Swimming in Altevatnet is physically possible and frequently done by locals and visitors in summer, but it is not without constraints. As a reservoir influenced by hydroelectric operations, water levels and currents can change quickly near outlets and dams, so bathing close to infrastructure is unsafe. The water remains cold compared with more southerly lakes, so prolonged swimming without a wetsuit risks hypothermia; there are generally no lifeguards and access can be remote, so caution, flotation aids and checking local conditions are advisable. Winter swimming is uncommon except for controlled ice-plunge traditions, and only for experienced participants.