Maridalsvannet — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Maridalsvannet, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Maridalsvannet today is 17.3°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 | 14.4°C | 17.4°C | |
| JUN 24 | 14.4°C | 17.4°C | |
| JUN 25 | 14.4°C | 17.4°C | |
| JUN 26 | 14.9°C | 17.4°C | |
| JUN 27 | 15.2°C | 17.4°C | |
| JUN 28 | 15.2°C | 17.4°C | |
| JUN 29 | 15.2°C | 17.4°C | |
| JUN 30 | 16.7°C | 17.4°C | |
| JUL 1 | 22.0°C | 17.5°C | |
| JUL 2 | 22.0°C | 17.8°C | |
| JUL 3 | 22.0°C | 18.0°C | |
| JUL 4 | 22.0°C | 18.2°C | |
| JUL 5 | 22.0°C | 18.5°C | |
| JUL 6 | 22.0°C | 18.7°C | |
| JUL 7 | 22.0°C | 18.9°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 | 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 | 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 |
Maridalsvannet: Water Temperature by Location
Maridalsvannet: Weather Forecast
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July 4
Location & Local Information
Maridalsvannet is the primary drinking water reservoir for Oslo, Norway, and its name in Norwegian is Maridalsvannet. Water temperatures vary seasonally: in spring (April–May) surface values commonly range from about 4–10 °C (39–50 °F) as ice melts and the lake stratifies; in summer (June–August) surface temperatures typically reach roughly 13–22 °C (55–72 °F) on warm days, though deeper water remains considerably cooler; autumn (September–October) sees cooling to around 6–14 °C (43–57 °F); and in winter (November–March) the lake often approaches freezing, about 0–4 °C (32–39 °F), with ice cover possible in cold spells. Local weather and specific years influence these figures, so short-term conditions can differ from the averages above.
Swimming opportunities at Maridalsvannet are very limited because the lake functions as Oslo’s drinking-water source and is protected for water quality reasons. Bathing and recreational access to the shoreline are generally restricted or prohibited by regulations and signage to minimize contamination risks and protect treatment operations. For those seeking outdoor swimming in the Oslo area, permitted public lakes and designated swimming sites are available elsewhere; at Maridalsvannet, recreational use is curtailed to safeguard the municipal water supply.