Notodden — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Notodden, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Notodden today is 12.5°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear. 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 13 | 13.4°C | 17.0°C | |
| SEP 14 | 13.2°C | 17.0°C | |
| SEP 15 | 13.5°C | 17.0°C | |
| SEP 16 | 13.0°C | 17.0°C | |
| SEP 17 | 13.3°C | 17.0°C | |
| SEP 18 | 13.3°C | 17.0°C | |
| SEP 19 | 12.9°C | 17.0°C | |
| SEP 20 | 12.7°C | 17.0°C | |
| SEP 21 | 17.0°C | 12.7°C | |
| SEP 22 | 17.0°C | 13.0°C | |
| SEP 23 | 17.0°C | 13.2°C | |
| SEP 24 | 17.0°C | 13.4°C | |
| SEP 25 | 17.0°C | 13.6°C | |
| SEP 26 | 17.0°C | 13.9°C | |
| SEP 27 | 17.0°C | 14.1°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 | 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 | 17°C |
| June | 11°C | 17°C | 23°C |
| July | 16°C | 21°C | 26°C |
| August | 16°C | 21°C | 26°C |
| September | 12°C | 17°C | 22°C |
| October | 7°C | 11°C | 14°C |
| November | 3°C | 7°C | 10°C |
| December | 0°C | 4°C | 7°C |
Notodden: Weather Forecast
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Notodden, in Telemark county, sits beside several inland water bodies such as Heddalsvatnet and the rivers that feed and drain it. Seasonal water temperatures in these lakes typically range from near freezing in winter, around 0–4 °C (32–39 °F) under ice, to spring values of roughly 4–12 °C (39–54 °F) as snowmelt and cool weather persist. In the warmest months, shallow bays and sheltered spots can reach about 16–22 °C (61–72 °F) in July and August, while deeper or exposed parts often remain cooler, around 10–16 °C (50–61 °F). Rivers in the area are generally colder and more variable: late spring runoff can keep them in the 4–10 °C (39–50 °F) range, with summer temperatures commonly between 8–14 °C (46–57 °F), depending on flow and depth.
Swimming in Notodden’s lakes and in calmer river sections is commonly practiced and permitted where public access exists, but conditions and rules vary. Local beaches and access points are popular in summer, yet safety considerations—cold water shock, sudden depth changes, strong currents and fluctuations from hydropower operations, and seasonal water quality checks—mean swimmers should heed signage and local advice. Winter ice swimming occurs among experienced people where ice and water quality are known to be safe, but it requires proper precautions and knowledge.