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 18.5°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 |
|---|---|---|---|
| JUN 23 | 15.8°C | 19.0°C | |
| JUN 24 | 15.8°C | 19.0°C | |
| JUN 25 | 15.8°C | 19.0°C | |
| JUN 26 | 16.4°C | 19.0°C | |
| JUN 27 | 16.6°C | 19.0°C | |
| JUN 28 | 16.6°C | 19.0°C | |
| JUN 29 | 16.6°C | 19.0°C | |
| JUN 30 | 18.2°C | 19.0°C | |
| JUL 1 | 22.0°C | 18.7°C | |
| JUL 2 | 22.0°C | 18.9°C | |
| JUL 3 | 22.0°C | 19.0°C | |
| JUL 4 | 22.0°C | 19.2°C | |
| JUL 5 | 22.0°C | 19.4°C | |
| JUL 6 | 22.0°C | 19.6°C | |
| JUL 7 | 22.0°C | 19.7°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 | 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 |
Femsjøen: Water Temperature by Location
Femsjøen: Weather Forecast
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July 4
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.