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 16.5°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 | 13.9°C | 15.1°C | |
| JUN 24 | 13.9°C | 15.1°C | |
| JUN 25 | 14.3°C | 15.1°C | |
| JUN 26 | 14.2°C | 15.1°C | |
| JUN 27 | 14.5°C | 15.1°C | |
| JUN 28 | 14.5°C | 15.1°C | |
| JUN 29 | 14.6°C | 15.1°C | |
| JUN 30 | 16.0°C | 15.1°C | |
| JUL 1 | 18.0°C | 16.6°C | |
| JUL 2 | 18.0°C | 16.7°C | |
| JUL 3 | 18.0°C | 16.7°C | |
| JUL 4 | 18.0°C | 16.8°C | |
| JUL 5 | 18.0°C | 16.9°C | |
| JUL 6 | 18.0°C | 17.0°C | |
| JUL 7 | 18.0°C | 17.0°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
July 1
July 2
July 3
July 4
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.