Hämeenlinna — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Hämeenlinna, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Hämeenlinna today is 15°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear. 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 |
|---|---|---|---|
| SEP 1 | 17.6°C | 17.0°C | |
| SEP 2 | 17.6°C | 17.0°C | |
| SEP 3 | 16.8°C | 17.0°C | |
| SEP 4 | 17.0°C | 17.0°C | |
| SEP 5 | 16.7°C | 17.0°C | |
| SEP 6 | 16.5°C | 17.0°C | |
| SEP 7 | 16.3°C | 17.0°C | |
| SEP 8 | 15.9°C | 17.0°C | |
| SEP 9 | 17.0°C | 15.1°C | |
| SEP 10 | 17.0°C | 15.2°C | |
| SEP 11 | 17.0°C | 15.3°C | |
| SEP 12 | 17.0°C | 15.4°C | |
| SEP 13 | 17.0°C | 15.5°C | |
| SEP 14 | 17.0°C | 15.6°C | |
| SEP 15 | 17.0°C | 15.7°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 | 0°C | 5°C | 8°C |
| May | 5°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 | 8°C |
| December | 0°C | 3°C | 6°C |
Hämeenlinna: Weather Forecast
September 9
September 10
September 11
September 12
September 13
Location & Local Information
Hämeenlinna, located in the Kanta-Häme region of southern Finland, is surrounded by beautiful lakes, one of which is Lake Hauhonselkä. This lake is part of the larger Vanajavesi water system and has clear water that reflects seasonal temperature changes. In spring, after the ice melts, the surface water remains cool at around 6–9 °C (43–48 °F). During early summer, it warms gradually to 15–18 °C (59–64 °F), and in July, the warmest month, the water typically reaches 19–22 °C (66–72 °F). On very hot days, sheltered bays may briefly reach 23–24 °C (73–75 °F). As autumn arrives, the temperature drops again below 10 °C (50 °F), and the lake freezes by late November.
Swimming in Lake Hauhonselkä is allowed and popular among residents and visitors. The water is clean and well suited for recreational swimming, with several small public beaches and piers around Hämeenlinna and Hauho. During July and August, the water temperature is comfortable for both casual bathers and open-water swimmers. The calm, scenic surroundings and good water quality make Hauhonselkä a pleasant place for swimming, boating, and enjoying the Finnish summer by the lake.