Nøklevann Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Nøklevann Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Nøklevann Lake today is 13.1°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 14 | 14.3°C | 18.0°C | |
| SEP 15 | 14.0°C | 18.0°C | |
| SEP 16 | 13.9°C | 18.0°C | |
| SEP 17 | 13.8°C | 18.0°C | |
| SEP 18 | 13.5°C | 18.0°C | |
| SEP 19 | 13.7°C | 18.0°C | |
| SEP 20 | 13.4°C | 18.0°C | |
| SEP 21 | 13.1°C | 18.0°C | |
| SEP 22 | 18.0°C | 13.3°C | |
| SEP 23 | 18.0°C | 13.6°C | |
| SEP 24 | 18.0°C | 13.8°C | |
| SEP 25 | 18.0°C | 14.1°C | |
| SEP 26 | 18.0°C | 14.3°C | |
| SEP 27 | 18.0°C | 14.6°C | |
| SEP 28 | 18.0°C | 14.8°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 | 1°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 |
Nøklevann Lake: Water Temperature by Location
Nøklevann Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Nøklevann, a forest lake in the Østmarka area of Oslo, typically follows the seasonal patterns of lakes in southeastern Norway. In spring, surface water temperatures are often low, roughly 4–10 °C (39–50 °F) as ice melts and warming begins. During summer the lake can warm to comfortable levels for swimming, commonly ranging from about 16–22 °C (61–72 °F) on warm days, though sheltered bays may be a degree or two warmer. Early autumn sees a gradual cooling to roughly 10–14 °C (50–57 °F), and by late autumn and winter the lake approaches near-freezing conditions or freezes over, with temperatures around 0–4 °C (32–39 °F) beneath ice or in open water patches.
Recreational swimming in and around Nøklevann is a common activity, as the shoreline and surrounding trails invite outdoor use, but the exact rules vary by location and season. Because parts of the lake have historically been managed as a reservoir and water protection measures can apply, there may be local restrictions or signage limiting access to protect water quality. Visitors should check municipal guidance and posted notices before swimming, and always consider water temperature, sudden depth changes and basic safety—cold water shock is a real risk outside the warmest summer weeks.