River Teifi — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the River Teifi, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the River Teifi today is 19.5°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 6 | 18.5°C | 18.0°C | |
| AUG 7 | 18.5°C | 18.0°C | |
| AUG 8 | 18.5°C | 18.0°C | |
| AUG 9 | 18.5°C | 18.0°C | |
| AUG 10 | 19.1°C | 18.0°C | |
| AUG 11 | 19.1°C | 18.0°C | |
| AUG 12 | 19.1°C | 18.0°C | |
| AUG 13 | 19.0°C | 18.0°C | |
| AUG 14 | 18.0°C | 19.4°C | |
| AUG 15 | 18.0°C | 19.4°C | |
| AUG 16 | 18.0°C | 19.3°C | |
| AUG 17 | 18.0°C | 19.2°C | |
| AUG 18 | 18.0°C | 19.1°C | |
| AUG 19 | 18.0°C | 19.1°C | |
| AUG 20 | 18.0°C | 19.0°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 | 0°C | 3°C | 7°C |
| February | 0°C | 4°C | 8°C |
| March | 2°C | 6°C | 9°C |
| April | 6°C | 9°C | 12°C |
| May | 9°C | 14°C | 19°C |
| June | 11°C | 17°C | 22°C |
| July | 14°C | 18°C | 23°C |
| August | 14°C | 18°C | 23°C |
| September | 10°C | 15°C | 19°C |
| October | 8°C | 11°C | 14°C |
| November | 3°C | 7°C | 10°C |
| December | 3°C | 3°C | 8°C |
River Teifi: Water Temperature by Location
River Teifi: Weather Forecast
August 14
August 15
August 16
Location & Local Information
Source:
• location Llyn Teifi
• coordinates 52.2918°N 3.7900°W
• elevation 455 m (1,493 ft)
Mouth:
• location Cardigan Bay
• coordinates 52.103°N 4.689°W
• elevation 0 m (0 ft)
Length 122 km (76 mi)
The River Teifi, one of Wales’s most beautiful rivers, flows from the Cambrian Mountains through Ceredigion and Carmarthenshire before reaching the sea at Cardigan Bay. Its clear, winding course reflects the cool but mild Welsh climate, with water temperatures that change steadily through the seasons. In winter, the Teifi typically remains between 3 and 6°C (37–43°F), staying cold and fast-moving. By spring, it begins to warm to around 8–11°C (46–52°F), while in midsummer—especially in July and August—the temperature can reach 16–19°C (61–66°F) in calmer stretches. As autumn returns, the river cools again to about 10–12°C (50–54°F), maintaining a refreshing but inviting feel through much of the year.
Swimming in the River Teifi is allowed and widely enjoyed, particularly during the warmer months when the current is gentle and the water clear. The river’s clean flow and deep pools make it one of Wales’s best spots for wild swimming, especially near Cenarth Falls and Llandysul, where calmer sections provide safe entry points. As always, care is needed after rain, when the current can strengthen. The Teifi Valley also offers scenic trails, canoeing, and fishing opportunities, with nearby attractions such as Cilgerran Castle and Cardigan’s coastal landscapes adding to its natural charm.