Oslo — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Oslo (Norway). It includes the current water temperature, daily data for the last month presented in a simple chart, and a 7-day forecast. The page also compares today’s value with typical averages for this period, shows usual monthly ranges during the year, and lists nearby beaches with short descriptions. Local weather for the next few days and general details about Oslo help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Oslo in the North Sea today is 20°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience.
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
Water temperature in Oslo has risen over the last week and month. Currently, the sea water at this location is slightly warmer than average for this day in previous years.
According to our forecast, Water temperature in Oslo will be 18.8°C in the next 7 days. See the table below for daily data for the upcoming week.
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| JUL 7 | 18.9°C | 17.3°C | |
| JUL 8 | 18.6°C | 17.5°C | |
| JUL 9 | 18.6°C | 17.3°C | |
| JUL 10 | 18.3°C | 17.5°C | |
| JUL 11 | 18.3°C | 17.8°C | |
| JUL 12 | 18.8°C | 18.3°C | |
| JUL 13 | 19.7°C | 18.5°C | |
| JUL 14 | 19.7°C | 18.8°C | |
| JUL 15 | 19.9°C | 18.8°C | 19.9°C |
| JUL 16 | 18.5°C | 19.7°C | |
| JUL 17 | 18.8°C | 19.6°C | |
| JUL 18 | 18.5°C | 19.4°C | |
| JUL 19 | 18.8°C | 19.3°C | |
| JUL 20 | 18.8°C | 19.1°C | |
| JUL 21 | 18.3°C | 18.9°C | |
| JUL 22 | 18.8°C | 18.8°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.
Water temperature data for this location is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.
Annual Water Temperature Overview by Month
Monthly Water Temp Ranges
Annual Water Temperature Trend
Oslo, capital of Norway in Oslo County, lies at the inner end of the Oslofjord and experiences a marked seasonal variation in seawater temperature. In winter months the surface temperature typically sits around 0–4 °C, with occasional cold snaps bringing slightly lower readings in sheltered spots. Spring sees a gradual warming from about 2 °C in early March to roughly 10–12 °C by late May as daylight increases. The warmest period is June through August when open-water temperatures generally range from 14 to 20 °C, with the warmest days and shallow bays occasionally reaching around 20 °C. Into autumn the water cools again, usually falling into the 7–13 °C range by September and continuing downward through November.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 0°C | 4°C | 7°C |
| February | 1°C | 3°C | 6°C |
| March | 1°C | 4°C | 7°C |
| April | 2°C | 6°C | 10°C |
| May | 6°C | 10°C | 15°C |
| June | 11°C | 15°C | 19°C |
| July | 15°C | 18°C | 22°C |
| August | 15°C | 18°C | 21°C |
| September | 12°C | 16°C | 19°C |
| October | 8°C | 12°C | 15°C |
| November | 5°C | 9°C | 13°C |
| December | 1°C | 6°C | 9°C |
* Click on a month to view detailed water temperature data.
Oslo: Weather Forecast
July 16
July 17
July 18
Location, Beaches & Local Information
Nearby Beaches & Facilities
Sorenga Beach
Tjuvholmen Beach
Hovedoya
Frognerkilen Skatepark
Kyststi
Bekkelagsbadet
Bygdøy Sjøbad
Langøyene Island
Paradisbukta Beach
Swimming Conditions
Swimming in Oslo is popular in summer when the bay and many small islands offer a variety of beach and bathing options, from sandy shores and grassy picnic spots to rocky jumps and wooden piers. Public beaches and outdoor pools along the fjord have changing facilities and cafés, and inner-city spots like floating seawater pools provide easy, urban access to the water. The nearby islands reachable by ferry give calmer waters and sheltered coves for families, while more exposed spots suit experienced swimmers, paddlers and open-water enthusiasts. Cold-water and winter bathing cultures are well established too, with saunas and organised short dips appealing to those seeking a bracing experience; regardless of season swimmers should be mindful of local conditions, water temperature and basic safety.