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 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 |
|---|---|---|---|
| AUG 11 | 19.4°C | 20.0°C | |
| AUG 12 | 18.7°C | 20.0°C | |
| AUG 13 | 18.5°C | 20.0°C | |
| AUG 14 | 18.5°C | 20.0°C | |
| AUG 15 | 18.4°C | 20.0°C | |
| AUG 16 | 18.4°C | 20.0°C | |
| AUG 17 | 18.3°C | 20.0°C | |
| AUG 18 | 18.3°C | 20.0°C | |
| AUG 19 | 20.0°C | 18.5°C | |
| AUG 20 | 20.0°C | 18.6°C | |
| AUG 21 | 20.0°C | 18.6°C | |
| AUG 22 | 20.0°C | 18.7°C | |
| AUG 23 | 20.0°C | 18.8°C | |
| AUG 24 | 20.0°C | 18.9°C | |
| AUG 25 | 20.0°C | 19.0°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
August 19
August 20
August 21
August 22
August 23
August 24
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.