Porvoonjoki River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Porvoonjoki River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Porvoonjoki River today is 3.8°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges less than 41°F (5°C). Such water is extremely cold and not recommended for swimming without proper preparation. In these conditions, the risk of hypothermia is very high, and prolonged exposure to the water can be hazardous to your health. If you decide to swim, it is important to have the appropriate gear, such as a wetsuit. Typically, only experienced swimmers or those who practice winter swimming venture into such waters. 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 |
|---|---|---|---|
| APR 11 | 2.0°C | 4.0°C | |
| APR 12 | 2.0°C | 4.0°C | |
| APR 13 | 2.3°C | 4.0°C | |
| APR 14 | 2.7°C | 4.0°C | |
| APR 15 | 2.8°C | 4.0°C | |
| APR 16 | 3.0°C | 4.0°C | |
| APR 17 | 3.1°C | 4.0°C | |
| APR 18 | 3.7°C | 4.0°C | |
| APR 19 | 4.0°C | 3.8°C | |
| APR 20 | 4.0°C | 3.8°C | |
| APR 21 | 4.0°C | 3.8°C | |
| APR 22 | 4.0°C | 3.8°C | |
| APR 23 | 4.0°C | 3.9°C | |
| APR 24 | 4.0°C | 3.9°C | |
| APR 25 | 4.0°C | 3.9°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 | 1°C | 4°C |
| February | 0°C | 1°C | 4°C |
| March | 0°C | 2°C | 5°C |
| April | 0°C | 4°C | 7°C |
| May | 5°C | 9°C | 14°C |
| June | 10°C | 15°C | 19°C |
| July | 11°C | 16°C | 20°C |
| August | 12°C | 17°C | 21°C |
| September | 9°C | 14°C | 18°C |
| October | 4°C | 8°C | 10°C |
| November | 0°C | 4°C | 8°C |
| December | 0°C | 2°C | 5°C |
Porvoonjoki River: Water Temperature by Location
Porvoonjoki River: Weather Forecast
April 19
April 20
April 21
April 22
April 23
April 24
Location & Local Information
Source:
• location Salpausselkä
• elevation 68 m (223 ft)
Mouth:
• location Gulf of Finland
Length 143 km (89 mi)
The Porvoonjoki River, located in southern Finland, flows from the Tavastia region through fields and forests before reaching the town of Porvoo and finally the Gulf of Finland. It is a slow-flowing river with a mixture of clear and slightly brownish water due to natural humus from the surrounding landscape. In spring, after the ice melts in April, the surface temperature of the river is around 4–7 °C (39–45 °F). During early summer, it rises gradually to 13–16 °C (55–61 °F), and in July, the warmest month, Porvoonjoki usually reaches 18–21 °C (64–70 °F). In shallow, calm sections, the water can briefly exceed 22 °C (72 °F). By late September, the temperature cools below 10 °C (50 °F), and in winter, parts of the river may freeze.
Swimming in the Porvoonjoki River is allowed but should be done with care. Water quality varies depending on rainfall and agricultural runoff, yet many sections near Porvoo and its surroundings are suitable for bathing during summer. The calm flow and moderate warmth make swimming possible on warm days, especially near designated spots or private piers. Although the river remains cooler than lakes in the region, its scenic banks and gentle current create a peaceful atmosphere for recreation.