Femsjøen — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Femsjøen, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Femsjøen today is 10.8°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 |
|---|---|---|---|
| OCT 4 | 11.7°C | 11.0°C | |
| OCT 5 | 11.6°C | 11.0°C | |
| OCT 6 | 11.4°C | 11.0°C | |
| OCT 7 | 11.5°C | 11.0°C | |
| OCT 8 | 11.5°C | 11.0°C | |
| OCT 9 | 11.5°C | 11.0°C | |
| OCT 10 | 10.6°C | 11.0°C | |
| OCT 11 | 10.8°C | 11.0°C | |
| OCT 12 | 11.0°C | 10.8°C | |
| OCT 13 | 11.0°C | 10.8°C | |
| OCT 14 | 11.0°C | 10.8°C | |
| OCT 15 | 11.0°C | 10.8°C | |
| OCT 16 | 11.0°C | 10.9°C | |
| OCT 17 | 11.0°C | 10.9°C | |
| OCT 18 | 11.0°C | 10.9°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 | 4°C | 8°C | 11°C |
| May | 7°C | 12°C | 18°C |
| June | 13°C | 19°C | 24°C |
| July | 17°C | 22°C | 27°C |
| August | 16°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 |
Femsjøen: Water Temperature by Location
Femsjøen: Weather Forecast
October 11
October 12
October 13
October 14
October 15
Location & Local Information
Femsjøen, a freshwater lake in Østfold County, Norway (Norwegian name: Femsjøen), shows pronounced seasonal changes in surface temperature. In spring, as ice melts and daylight increases, surface waters typically warm from about 3–10 °C (37–50 °F). Summer months bring the warmest conditions, with surface temperatures most often between roughly 15–22 °C (59–72 °F) on sunny, calm days. During early autumn temperatures generally fall again to around 8–12 °C (46–54 °F), and in winter the lake commonly approaches freezing, with surface readings near 0–4 °C (32–39 °F) and frequent ice cover depending on the winter severity.
Swimming at Femsjøen is generally possible and commonly practiced in the warmer months, supported by Norway’s right of public access to nature; there are no widespread prohibitions, but local signs or private shoreline restrictions can apply. Because of the lake’s seasonal variability, swimmers should be mindful of water temperature and safety: summer swims are comfortable for many, while spring and autumn waters are cold and can cause cold-water shock; winter conditions are only suitable for experienced ice-swimmers using proper precautions. Always check local information about water quality, access points, and any posted warnings before entering the water.