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 18.4°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 |
|---|---|---|---|
| JUL 14 | 19.3°C | 18.0°C | |
| JUL 15 | 19.3°C | 18.0°C | |
| JUL 16 | 19.3°C | 18.0°C | |
| JUL 17 | 20.3°C | 18.0°C | |
| JUL 18 | 20.3°C | 18.0°C | |
| JUL 19 | 20.3°C | 18.0°C | |
| JUL 20 | 20.3°C | 18.0°C | |
| JUL 21 | 18.4°C | 18.0°C | |
| JUL 22 | 18.0°C | 18.4°C | |
| JUL 23 | 18.0°C | 18.4°C | |
| JUL 24 | 18.0°C | 18.3°C | |
| JUL 25 | 18.0°C | 18.3°C | |
| JUL 26 | 18.0°C | 18.3°C | |
| JUL 27 | 18.0°C | 18.3°C | |
| JUL 28 | 18.0°C | 18.3°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 22
July 23
July 24
July 25
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.