Oslo — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Oslo, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Oslo 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 13 | 14.1°C | 15.0°C | |
| SEP 14 | 13.4°C | 15.0°C | |
| SEP 15 | 13.6°C | 15.0°C | |
| SEP 16 | 13.3°C | 15.0°C | |
| SEP 17 | 13.4°C | 15.0°C | |
| SEP 18 | 13.3°C | 15.0°C | |
| SEP 19 | 13.3°C | 15.0°C | |
| SEP 20 | 13.0°C | 15.0°C | |
| SEP 21 | 15.0°C | 13.2°C | |
| SEP 22 | 15.0°C | 13.3°C | |
| SEP 23 | 15.0°C | 13.4°C | |
| SEP 24 | 15.0°C | 13.5°C | |
| SEP 25 | 15.0°C | 13.6°C | |
| SEP 26 | 15.0°C | 13.7°C | |
| SEP 27 | 15.0°C | 13.8°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 | 2°C | 5°C |
| February | 0°C | 2°C | 5°C |
| March | 0°C | 3°C | 6°C |
| April | 2°C | 6°C | 9°C |
| May | 6°C | 10°C | 15°C |
| June | 10°C | 15°C | 20°C |
| July | 14°C | 18°C | 23°C |
| August | 14°C | 18°C | 23°C |
| September | 10°C | 15°C | 19°C |
| October | 6°C | 9°C | 12°C |
| November | 2°C | 6°C | 9°C |
| December | 0°C | 3°C | 6°C |
Oslo: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Oslo, the capital of Norway, is surrounded by forested hills and numerous lakes that moderate the local recreational climate. Surface temperatures in popular bathing lakes typically rise from about 6–12 °C (43–54 °F) in late spring to 15–22 °C (59–72 °F) in the height of summer, with shallow, sheltered spots occasionally reaching 24 °C (75 °F) during heatwaves. By September and October temperatures commonly fall back to roughly 8–14 °C (46–57 °F), and in winter many lakes approach freezing around 0 °C (32 °F) with ice cover in colder years. These ranges vary with depth, exposure and recent weather; deeper reservoirs warm and cool more slowly than small, shallow ponds.
Swimming is widely practiced in Oslo’s lakes and there are many designated bathing spots and small beaches where it is explicitly permitted for recreation. However, swimming is not allowed in some bodies of water used as drinking-water reservoirs, where restrictions exist to protect water quality. Most public lakes lack lifeguards, so visitors should judge conditions and act cautiously; water quality is monitored in popular areas and local signs indicate permitted places. In short, recreational swimming is available across Oslo’s lake landscape during the warmer months, subject to local regulations and natural temperature variations.