Østensjøvannet — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Østensjøvannet, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Østensjøvannet today is 9.7°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 | 11.0°C | 11.0°C | |
| OCT 5 | 11.3°C | 11.0°C | |
| OCT 6 | 10.7°C | 11.0°C | |
| OCT 7 | 10.5°C | 11.0°C | |
| OCT 8 | 10.7°C | 11.0°C | |
| OCT 9 | 10.7°C | 11.0°C | |
| OCT 10 | 10.1°C | 11.0°C | |
| OCT 11 | 9.7°C | 11.0°C | |
| OCT 12 | 11.0°C | 9.8°C | |
| OCT 13 | 11.0°C | 9.8°C | |
| OCT 14 | 11.0°C | 9.9°C | |
| OCT 15 | 11.0°C | 10.0°C | |
| OCT 16 | 11.0°C | 10.0°C | |
| OCT 17 | 11.0°C | 10.1°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 | 2°C | 7°C | 11°C |
| May | 7°C | 12°C | 18°C |
| June | 10°C | 17°C | 24°C |
| July | 16°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 |
Østensjøvannet: Water Temperature by Location
Østensjøvannet: Weather Forecast
October 12
October 13
October 14
October 15
Location & Local Information
Østensjøvannet, a shallow lake in Oslo, shows clear seasonal swings in water temperature. In winter the surface is typically at or just below freezing, around 0 °C (32 °F), and the lake often freezes over. Spring thaw brings temperatures up to roughly 2–10 °C (36–50 °F) from April into May. During the height of summer the water commonly warms to about 15–22 °C (59–72 °F), and occasional heat spells can push surface readings a few degrees higher. In autumn the lake cools again, with typical values in September and October of roughly 6–14 °C (43–57 °F) as the season transitions toward winter.
Swimming in Østensjøvannet is not promoted as a mainstream recreational activity because the area is an important bird habitat and has protected status in parts; as a result, bathing is often discouraged and in some zones restricted to reduce disturbance to wildlife. Water quality can also vary in a shallow urban lake, so municipal signage and local regulations should be checked before entering the water. Locals sometimes swim in warm weather where permitted, but visitors should respect conservation rules and posted notices to avoid harming nesting birds or violating protection measures.