River Taff — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the River Taff, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the River Taff today is 11.9°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
❌ As of today, the minimum water temperature ranges from 50°F (10°C) to 54°F (12°C). The water is slightly warmer, but still cool for most people. Swimming in such conditions is possible, but for most people, the time spent in the water should be limited to avoid hypothermia. Even experienced swimmers may feel discomfort if they stay in the water for too long. To improve comfort and safety, a wetsuit can be used. 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 3 | 11.8°C | 17.9°C | |
| JUN 4 | 11.8°C | 17.9°C | |
| JUN 5 | 11.8°C | 17.9°C | |
| JUN 6 | 12.2°C | 17.9°C | |
| JUN 7 | 11.9°C | 17.9°C | |
| JUN 8 | 11.9°C | 17.9°C | |
| JUN 10 | 11.9°C | 17.9°C | |
| JUN 11 | 17.9°C | 12.2°C | |
| JUN 12 | 17.9°C | 12.5°C | |
| JUN 13 | 17.9°C | 12.8°C | |
| JUN 14 | 17.9°C | 13.1°C | |
| JUN 15 | 17.9°C | 13.4°C | |
| JUN 16 | 17.9°C | 13.7°C | |
| JUN 17 | 17.9°C | 14.0°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 | 2°C | 6°C | 9°C |
| February | 3°C | 7°C | 9°C |
| March | 5°C | 9°C | 11°C |
| April | 7°C | 11°C | 14°C |
| May | 9°C | 14°C | 18°C |
| June | 11°C | 18°C | 24°C |
| July | 16°C | 20°C | 25°C |
| August | 15°C | 19°C | 24°C |
| September | 13°C | 18°C | 22°C |
| October | 9°C | 13°C | 16°C |
| November | 5°C | 9°C | 11°C |
| December | 3°C | 7°C | 9°C |
River Taff: Water Temperature by Location
River Taff: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Source Taf Fawr
• location Corn Du, Brecon Beacons, Powys, Wales
Mouth Cardiff Bay
• location Cardiff, Wales
Length 67 km (42 mi)
The River Taff flows from the Brecon Beacons in South Wales to Cardiff Bay, passing through valleys, forests, and urban landscapes along its course. Its water temperature reflects the cool, temperate Welsh climate and changes notably with the seasons. In winter, the river is cold, averaging around 4–6 °C (39–43 °F), while spring brings a slow rise to 8–10 °C (46–50 °F). During the summer months, the upper stretches may reach 15–17 °C (59–63 °F), though shaded areas and faster currents stay cooler. By autumn, temperatures fall again toward 9–11 °C (48–52 °F), with rainfall and river flow influencing the daily variation.
Swimming in the River Taff is permitted in some areas, though it is best suited to experienced wild swimmers who understand the risks of changing currents and water quality. Popular and safe spots tend to be upstream near Pontypridd and in calmer pools within the Brecon Beacons National Park, where the water is clearer and more sheltered. In Cardiff, swimming is discouraged due to urban runoff and boat traffic. Wetsuits are often used outside midsummer for warmth. The river’s surroundings offer scenic walking and cycling routes, and nearby attractions include Castell Coch, Pontcana Fields, and the lively Cardiff waterfront.