Øymarksjøen — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Øymarksjøen, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Øymarksjøen today is 9.8°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 47°F (8°C) to 50°F (10°C). This is still cool water, suitable only for experienced swimmers or those accustomed to cold water. Swimming in such conditions is possible, but not recommended for prolonged periods. Extra caution should be taken during extended exposure, as the cold water can cause heat loss and lead to hypothermia. For added comfort, special clothing 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 | 10.9°C | 11.0°C | |
| OCT 5 | 10.7°C | 11.0°C | |
| OCT 6 | 10.5°C | 11.0°C | |
| OCT 7 | 10.7°C | 11.0°C | |
| OCT 8 | 10.6°C | 11.0°C | |
| OCT 9 | 10.8°C | 11.0°C | |
| OCT 10 | 9.7°C | 11.0°C | |
| OCT 11 | 9.8°C | 11.0°C | |
| OCT 12 | 11.0°C | 9.9°C | |
| OCT 13 | 11.0°C | 9.9°C | |
| OCT 14 | 11.0°C | 10.0°C | |
| OCT 15 | 11.0°C | 10.0°C | |
| OCT 16 | 11.0°C | 10.1°C | |
| OCT 17 | 11.0°C | 10.2°C | |
| OCT 18 | 11.0°C | 10.2°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 | 3°C | 7°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 |
Øymarksjøen: Water Temperature by Location
Øymarksjøen: Weather Forecast
October 11
October 12
October 13
October 14
October 15
Location & Local Information
Øymarksjøen, a lake in the former Østfold county of southeastern Norway, experiences pronounced seasonal variation in surface water temperature. In spring (roughly March–May) the lake typically measures about 2–10 °C (36–50 °F) as ice melts and warming begins. Summer months (June–August) are when the warmest conditions occur, with surface temperatures commonly between 15–22 °C (59–72 °F), and shallow bays can become slightly warmer on sunny days. In autumn (September–November) the water cools again to roughly 5–12 °C (41–54 °F), while winter brings temperatures near freezing around 0 °C (32 °F) and often ice cover, limiting open-water conditions.
Swimming in Øymarksjøen is generally allowed and commonly practiced in summer because Norway’s public access traditions and local recreational use permit bathing in natural waters. Access to shores and informal beaches makes summer swimming straightforward, but conditions vary by spot and year. Caution is advised due to cold-water shock outside the warmest months, sudden weather changes, boat traffic in some areas, and ice hazards in winter. Visitors should check local conditions and exercise normal water-safety precautions before entering the lake.