Lake Tissø — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Tissø, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Tissø 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 |
|---|---|---|---|
| AUG 24 | 18.3°C | 20.0°C | |
| AUG 25 | 18.3°C | 20.0°C | |
| AUG 26 | 18.3°C | 20.0°C | |
| AUG 27 | 18.3°C | 20.0°C | |
| AUG 28 | 18.4°C | 20.0°C | |
| AUG 29 | 18.7°C | 20.0°C | |
| AUG 30 | 18.7°C | 20.0°C | |
| AUG 31 | 18.7°C | 20.0°C | |
| SEP 1 | 17.0°C | 18.6°C | |
| SEP 2 | 17.0°C | 18.5°C | |
| SEP 3 | 17.0°C | 18.4°C | |
| SEP 4 | 17.0°C | 18.4°C | |
| SEP 5 | 17.0°C | 18.3°C | |
| SEP 6 | 17.0°C | 18.2°C | |
| SEP 7 | 17.0°C | 18.1°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 | 4°C | 7°C |
| February | 0°C | 3°C | 6°C |
| March | 2°C | 6°C | 9°C |
| April | 5°C | 9°C | 12°C |
| May | 9°C | 14°C | 20°C |
| June | 14°C | 20°C | 25°C |
| July | 14°C | 20°C | 25°C |
| August | 14°C | 20°C | 25°C |
| September | 11°C | 17°C | 22°C |
| October | 7°C | 11°C | 14°C |
| November | 5°C | 9°C | 12°C |
| December | 1°C | 5°C | 8°C |
Lake Tissø: Water Temperature by Location
Lake Tissø: Weather Forecast
September 1
September 2
September 3
September 4
September 5
Location & Local Information
Lake Tissø (Danish: Tissø) in Region Zealand is a shallow, lowland lake whose water temperature varies markedly with the seasons. In winter the surface commonly sits near freezing, about 0–4 °C (32–39 °F), while spring temperatures rise through roughly 4–12 °C (39–54 °F) as ice melts and the water stratifies. During summer the lake often reaches its warmest values, typically between 16–22 °C (61–72 °F), though sheltered bays and shallow areas can be a degree or two warmer on sunny days. Autumn sees a steady cooling to around 8–14 °C (46–57 °F) as the air temperature drops and mixing increases. Year-to-year variation depends on weather patterns, wind and local inflows.
Swimming is generally allowed at Tissø and people commonly bathe there in the summer months because the relatively shallow water warms enough to be comfortable. There are no universal lifeguard services, so visitors should follow local signage and exercise personal caution, especially in wind or low-visibility conditions. Water quality is monitored by authorities, but warm, calm weather can sometimes lead to algal blooms or reduced visibility, so it is sensible to check current advisories before entering the water.