Töölö Bay — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Töölö Bay, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Töölö Bay today is 18.7°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 |
|---|---|---|---|
| JUN 23 | 17.1°C | 18.0°C | |
| JUN 24 | 17.3°C | 18.0°C | |
| JUN 25 | 17.2°C | 18.0°C | |
| JUN 26 | 16.8°C | 18.0°C | |
| JUN 27 | 16.8°C | 18.0°C | |
| JUN 28 | 16.8°C | 18.0°C | |
| JUN 29 | 17.9°C | 18.0°C | |
| JUN 30 | 18.3°C | 18.0°C | |
| JUL 1 | 19.0°C | 18.7°C | |
| JUL 2 | 19.0°C | 18.7°C | |
| JUL 3 | 19.0°C | 18.7°C | |
| JUL 4 | 19.0°C | 18.8°C | |
| JUL 5 | 19.0°C | 18.8°C | |
| JUL 6 | 19.0°C | 18.8°C | |
| JUL 7 | 19.0°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.
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 | 1°C | 5°C | 8°C |
| May | 6°C | 11°C | 17°C |
| June | 12°C | 18°C | 23°C |
| July | 13°C | 19°C | 24°C |
| August | 14°C | 20°C | 25°C |
| September | 11°C | 17°C | 22°C |
| October | 5°C | 9°C | 12°C |
| November | 1°C | 5°C | 9°C |
| December | 0°C | 3°C | 6°C |
Töölö Bay: Water Temperature by Location
Töölö Bay: Weather Forecast
July 1
July 2
July 3
July 4
Location & Local Information
Töölö Bay, located in central Helsinki in the Uusimaa region, is a shallow urban lake surrounded by parkland and cultural landmarks. Because of its small size and depth, the water temperature changes quickly with the seasons. After the ice melts in late April, surface temperatures start at around 5–8 °C (41–46 °F). In early summer, the water warms to about 13–17 °C (55–63 °F), and by July, the warmest month, the temperature can reach 18–22 °C (64–72 °F) during sunny periods. However, due to limited water circulation, the temperature can fluctuate rapidly depending on weather. By October, the water cools below 10 °C (50 °F), and the bay typically freezes over in late November.
Swimming in Töölö Bay is not officially allowed, mainly because of water quality concerns and the bay’s urban location. The bay’s shallow and nutrient-rich waters often experience algae growth during the summer, which can reduce clarity and affect hygiene levels. However, the area remains a popular spot for outdoor activities such as walking, rowing, and birdwatching. For swimming, residents usually visit nearby designated beaches such as Hietaranta or Seurasaari, where the water is cleaner and monitored regularly, providing safe and enjoyable conditions for bathing during the warm months.