Roskilde — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Roskilde, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Roskilde today is 15.3°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 60°F (15°C) to 65°F (18°C). The water is comfortable for most people, making it an ideal range for water sports enthusiasts. The temperature does not cause significant discomfort, and swimming will be pleasant for the majority. However, it's important to remember that prolonged exposure to the water can still lead to cooling, so it's essential to monitor the time spent in the water, especially for children or elderly people. 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 13 | 16.5°C | 17.0°C | |
| SEP 14 | 16.3°C | 17.0°C | |
| SEP 15 | 16.2°C | 17.0°C | |
| SEP 16 | 16.3°C | 17.0°C | |
| SEP 17 | 16.0°C | 17.0°C | |
| SEP 18 | 15.6°C | 17.0°C | |
| SEP 19 | 15.5°C | 17.0°C | |
| SEP 20 | 15.3°C | 17.0°C | |
| SEP 21 | 17.0°C | 15.4°C | |
| SEP 22 | 17.0°C | 15.5°C | |
| SEP 23 | 17.0°C | 15.6°C | |
| SEP 24 | 17.0°C | 15.6°C | |
| SEP 25 | 17.0°C | 15.7°C | |
| SEP 26 | 17.0°C | 15.8°C | |
| SEP 27 | 17.0°C | 15.9°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 | 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 |
Roskilde: Weather Forecast
September 21
September 22
September 23
September 24
Location & Local Information
Roskilde, located on Zealand, sits beside Roskilde Fjord and near several small lakes, where water temperatures show clear seasonal patterns. In spring (March–May) surface temperatures typically rise from about 4–10 °C (39–50 °F) as the water thaws. Summer (June–August) brings the warmest conditions, with surface readings commonly between 16–22 °C (61–72 °F) and occasionally higher during heat waves. Autumn (September–November) sees a decline to roughly 8–14 °C (46–57 °F), while winter (December–February) temperatures often fall toward freezing, around 0–4 °C (32–39 °F) on the surface. Exact values vary with wind, sunshine, depth and whether the spot is in the shallow fjord or a sheltered inland lake; deeper water remains colder throughout the year.
Swimming is generally allowed at Roskilde’s designated bathing sites because municipal monitoring usually finds acceptable water quality during the bathing season, and public beaches are maintained for recreational use. Local authorities publish site-specific information and may close or advise against bathing temporarily if tests detect pollution, harmful algal blooms, or dangerous conditions. Swimmers should also be mindful of boat traffic in the fjord, variable visibility, and colder temperatures below the surface, and follow posted safety guidance at official beaches.