River Towy — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the River Towy, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the River Towy today is 19.7°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 |
|---|---|---|---|
| JUL 16 | 19.8°C | 19.8°C | |
| JUL 17 | 19.6°C | 19.8°C | |
| JUL 18 | 19.6°C | 19.8°C | |
| JUL 19 | 19.6°C | 19.8°C | |
| JUL 20 | 19.6°C | 19.8°C | |
| JUL 21 | 19.7°C | 19.8°C | |
| JUL 22 | 19.7°C | 19.8°C | |
| JUL 23 | 19.7°C | 19.8°C | |
| JUL 24 | 19.8°C | 19.7°C | |
| JUL 25 | 19.8°C | 19.7°C | |
| JUL 26 | 19.8°C | 19.7°C | |
| JUL 27 | 19.8°C | 19.7°C | |
| JUL 28 | 19.8°C | 19.7°C | |
| JUL 29 | 19.8°C | 19.7°C | |
| JUL 30 | 19.8°C | 19.7°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 | 14°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 Towy: Water Temperature by Location
River Towy: Weather Forecast
July 24
July 25
July 26
July 27
Location & Local Information
Source:
• location Cambrian Mountains (SN802631)
• coordinates 52.25299°N 3.75642°W
• elevation 488 m (1,601 ft)
Mouth Carmarthen Bay
Length 120 km (75 mi)
The River Towy, the longest river flowing entirely within Wales, offers a fresh, often brisk water environment, especially as it descends from its source in the Cambrian Mountains. Seasonal water temperatures fluctuate significantly; winter brings the coldest conditions, with the river often hovering between a chilling 3∘C and 7∘C (37∘F to 45∘F). During the warmest summer months, particularly in its lower, slower-moving stretches, the temperature may rise to a peak of around 16∘C to 20∘C (61∘F to 68∘F), though these higher readings are not consistent throughout its length.
Unregulated swimming in the Towy is generally discouraged due to strong, often powerful currents, and the presence of deep pools, which pose a cold-water shock and drowning risk, especially near areas like Carmarthen. Additionally, there are increasing concerns about water quality due to pollution, which has recently led to the cancellation of local river swimming events. However, a notable exception is the annual Welsh Open Water Estuary Swim near Ferryside, which takes place in the lower tidal reach. Other attractions in the Towy Valley area include the dramatic cliff-top fortress of Carreg Cennen Castle, the historic Dinefwr Park and Castle, and the picturesque market town of Llandeilo.