Hartevatnet — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Hartevatnet, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Hartevatnet today is 4.6°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 4 | 6.0°C | 8.0°C | |
| OCT 5 | 5.6°C | 8.0°C | |
| OCT 6 | 5.5°C | 8.0°C | |
| OCT 7 | 5.3°C | 8.0°C | |
| OCT 8 | 5.1°C | 8.0°C | |
| OCT 9 | 5.4°C | 8.0°C | |
| OCT 10 | 5.3°C | 8.0°C | |
| OCT 11 | 4.9°C | 8.0°C | |
| OCT 12 | 8.0°C | 4.8°C | |
| OCT 13 | 8.0°C | 4.9°C | |
| OCT 14 | 8.0°C | 5.1°C | |
| OCT 15 | 8.0°C | 5.3°C | |
| OCT 16 | 8.0°C | 5.5°C | |
| OCT 17 | 8.0°C | 5.6°C | |
| OCT 18 | 8.0°C | 5.8°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 | 3°C |
| February | 0°C | 2°C | 3°C |
| March | 0°C | 2°C | 4°C |
| April | 0°C | 4°C | 8°C |
| May | 3°C | 9°C | 14°C |
| June | 9°C | 15°C | 21°C |
| July | 13°C | 19°C | 24°C |
| August | 12°C | 18°C | 24°C |
| September | 9°C | 14°C | 20°C |
| October | 4°C | 8°C | 11°C |
| November | 0°C | 4°C | 7°C |
| December | 0°C | 2°C | 4°C |
Hartevatnet: Water Temperature by Location
Hartevatnet: Weather Forecast
October 12
October 13
October 14
October 15
Location & Local Information
Hartevatnet is a freshwater lake in Agder County, Norway, and its surface temperatures vary with the seasons. In summer the surface commonly warms to roughly 15–22 °C (59–72 °F), which many find pleasant for swimming on warm days. During spring and autumn the water is cooler, typically around 4–12 °C (39–54 °F), and in winter the lake can approach freezing conditions; when ice forms the water beneath will be close to 0 °C (32 °F), while any open or flowing areas may be around 1–4 °C (34–39 °F). Local weather, depth and wind exposure influence these values, so temperatures at a given spot can differ from the general ranges.
Swimming in Hartevatnet is generally possible and commonly practised during the warmer months, supported by Norway’s public right of access (allemannsretten), which allows people to use many natural areas unless specific restrictions apply. There are no widespread bans on swimming, but visitors should check for local signs or private property limits. Safety considerations are important: no lifeguards are present, cold-water shock can occur outside summer, and shoreline conditions may be uneven. For safer outings, choose sheltered spots, swim with companions, and consider a wetsuit or flotation aid if water is below comfortable temperatures.