River Dee — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the River Dee, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the River Dee 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 |
|---|---|---|---|
| JUN 24 | 16.7°C | 18.0°C | |
| JUN 25 | 16.8°C | 18.0°C | |
| JUN 26 | 16.8°C | 18.0°C | |
| JUN 27 | 18.2°C | 18.0°C | |
| JUN 28 | 18.3°C | 18.0°C | |
| JUN 29 | 17.8°C | 18.0°C | |
| JUN 30 | 18.4°C | 18.0°C | |
| JUL 1 | 18.4°C | 19.0°C | |
| JUL 2 | 19.0°C | 18.4°C | |
| JUL 3 | 19.0°C | 18.5°C | |
| JUL 4 | 19.0°C | 18.5°C | |
| JUL 5 | 19.0°C | 18.5°C | |
| JUL 6 | 19.0°C | 18.6°C | |
| JUL 7 | 19.0°C | 18.6°C | |
| JUL 8 | 19.0°C | 18.6°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 | 1°C | 5°C | 8°C |
| February | 1°C | 5°C | 8°C |
| March | 2°C | 6°C | 9°C |
| April | 6°C | 9°C | 12°C |
| May | 9°C | 14°C | 18°C |
| June | 14°C | 18°C | 23°C |
| July | 15°C | 19°C | 24°C |
| August | 14°C | 18°C | 23°C |
| September | 11°C | 16°C | 20°C |
| October | 9°C | 12°C | 15°C |
| November | 4°C | 8°C | 12°C |
| December | 1°C | 5°C | 8°C |
River Dee: Water Temperature by Location
River Dee: Weather Forecast
July 1
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July 4
July 5
July 6
Location & Local Information
Source:
• location slopes of Dduallt above Llanuwchllyn, Snowdonia, Wales
• coordinates 52.8322°N 3.7656°W
• elevation 450 m (1,480 ft)
Mouth Dee Estuary
• coordinates 53.3539°N 3.2258°W
• elevation 0 m (0 ft)
Length 113 km (70 mi)
The River Dee, flowing through North Wales and England, experiences a seasonal water temperature range typical of its latitude. In the winter, particularly in the upper reaches and near the Welsh mountains, temperatures can be quite cold, generally fluctuating between approximately 7∘C and 10∘C (45∘F to 50∘F). By mid-summer, the water warms considerably, especially downstream near Chester, often reaching 15∘C to 18.5∘C (59∘F to 65∘F), with occasional spikes above 20∘C (68∘F) during extreme heat.
Swimming is not officially promoted or designated in most areas of the River Dee due to the inherent dangers of open water, which include strong, unpredictable currents, especially after rain, and unseen obstacles. However, wild swimming is popular, particularly in sections near Llangollen such as the Rock Pools or Horseshoe Falls, and upstream from Chester. Swimmers assume the risk of the cold temperature shock and potential waterborne illnesses, as the river does not have designated bathing status. Beyond the water, nearby attractions include the historic city of Chester's Roman Walls and Cathedral, and the dramatic Pontcysyllte Aqueduct near Llangollen, a UNESCO World Heritage Site.