Lake Langesø — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Langesø, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Langesø today is 18.8°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 | 18.5°C | 20.0°C | |
| AUG 25 | 18.6°C | 20.0°C | |
| AUG 26 | 18.6°C | 20.0°C | |
| AUG 27 | 18.6°C | 20.0°C | |
| AUG 28 | 18.7°C | 20.0°C | |
| AUG 29 | 18.8°C | 20.0°C | |
| AUG 30 | 18.8°C | 20.0°C | |
| AUG 31 | 18.8°C | 20.0°C | |
| SEP 1 | 17.0°C | 18.7°C | |
| SEP 2 | 17.0°C | 18.6°C | |
| SEP 3 | 17.0°C | 18.5°C | |
| SEP 4 | 17.0°C | 18.4°C | |
| SEP 5 | 17.0°C | 18.4°C | |
| SEP 6 | 17.0°C | 18.3°C | |
| SEP 7 | 17.0°C | 18.2°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 Langesø: Water Temperature by Location
Lake Langesø: Weather Forecast
September 1
September 2
September 3
September 4
September 5
Location & Local Information
Haraldsted Sø (also sometimes referred to locally as Lake Langesø) is a modest-sized lake in Region Zealand, Denmark. Water temperatures vary seasonally: in spring (March–May) the surface commonly warms from about 4–10 °C (39–50 °F) as snowmelt and cool air still influence the lake. During summer (June–August) typical surface temperatures are often 16–22 °C (61–72 °F), and in warm, calm years brief peaks to around 24 °C (75 °F) can occur. In autumn (September–November) the lake cools again to roughly 8–14 °C (46–57 °F), while winter temperatures frequently sit near 0–4 °C (32–39 °F) and may lead to partial icing in cold spells.
Swimming at Haraldsted Sø is generally allowed and the lake is used for recreational bathing by locals during the warmer months. Public access and established bathing spots make it a common summer activity, and municipal authorities typically monitor water quality and post warnings if bacterial counts or blue‑green algae make swimming inadvisable. Visitors should pay attention to signage, be aware that there are not always lifeguards, and consider cold‑water risks early and late in the season; otherwise the lake offers standard open‑water swimming opportunities typical for Danish inland waters.