Sperillen Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Sperillen Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Sperillen Lake today is 12.2°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 | 12.9°C | 17.0°C | |
| SEP 15 | 13.4°C | 17.0°C | |
| SEP 16 | 13.2°C | 17.0°C | |
| SEP 17 | 12.9°C | 17.0°C | |
| SEP 18 | 12.7°C | 17.0°C | |
| SEP 19 | 12.6°C | 17.0°C | |
| SEP 20 | 12.4°C | 17.0°C | |
| SEP 22 | 17.0°C | 12.4°C | |
| SEP 23 | 17.0°C | 12.7°C | |
| SEP 24 | 17.0°C | 12.9°C | |
| SEP 25 | 17.0°C | 13.2°C | |
| SEP 26 | 17.0°C | 13.4°C | |
| SEP 27 | 17.0°C | 13.6°C | |
| SEP 28 | 17.0°C | 13.9°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 | 2°C | 5°C |
| February | 0°C | 2°C | 5°C |
| March | 0°C | 3°C | 6°C |
| April | 1°C | 5°C | 8°C |
| May | 6°C | 11°C | 17°C |
| June | 9°C | 17°C | 23°C |
| July | 13°C | 19°C | 24°C |
| August | 14°C | 20°C | 25°C |
| September | 11°C | 17°C | 22°C |
| October | 5°C | 9°C | 12°C |
| November | 1°C | 5°C | 8°C |
| December | 0°C | 3°C | 6°C |
Sperillen Lake: Water Temperature by Location
Sperillen Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Sperillen is a fairly large, deep freshwater lake in the former Buskerud area of Norway, and its surface temperatures reflect the Norwegian climate. In spring (April–May) the water typically ranges from about 2–8 °C (36–46 °F) as snowmelt and cool nights keep the lake chilly. Summer (June–August) brings the warmest conditions, with typical surface temperatures around 12–20 °C (54–68 °F) on sunnier days, though the deep parts of the lake remain much colder. In autumn (September–October) temperatures fall again to roughly 6–12 °C (43–54 °F). In winter the surface is often close to freezing and may be covered by ice; surface water tends to be around 0–4 °C (32–39 °F) where it is not frozen, while deeper water stays near 4 °C year-round.
Swimming at Sperillen (Sperillen) is generally allowed and is a common summer activity where there is public access, but conditions determine suitability. The lake’s depth and northern location mean it warms slowly, so only the warmest summer days are comfortable for prolonged swimming. Boat traffic, sudden weather changes, cold shock and strong undercurrents near outlets are the main safety concerns; there are typically no lifeguards, so swimmers should use caution, wear a wetsuit if needed, and avoid ice swimming without proper precautions and local guidance.