Southerndown — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Southerndown (Wales, United Kingdom). It includes the current water temperature, daily data for the last month presented in a simple chart, and a 7-day forecast. The page also compares today’s value with typical averages for this period, shows usual monthly ranges during the year, and lists nearby beaches with short descriptions. Local weather for the next few days and general details about Southerndown help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Southerndown in the Celtic Sea today is 15°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
Water temperature in Southerndown rose over the last 30 days but fell over the last week. Currently, the sea water temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in Southerndown will be 14.6°C in the next 7 days. See the table below for daily data for the upcoming week.
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| JUN 5 | 15.1°C | 13.8°C | |
| JUN 6 | 15.2°C | 13.8°C | |
| JUN 7 | 15.2°C | 14.3°C | |
| JUN 8 | 15.2°C | 14.5°C | |
| JUN 9 | 15.3°C | 13.8°C | |
| JUN 10 | 15.4°C | 14.5°C | |
| JUN 11 | 15.0°C | 14.3°C | |
| JUN 12 | 15.2°C | 14.3°C | |
| JUN 13 | 15.1°C | 14.3°C | 15.1°C |
| JUN 14 | 14.3°C | 15.0°C | |
| JUN 15 | 14.3°C | 15.0°C | |
| JUN 16 | 14.0°C | 14.9°C | |
| JUN 17 | 14.5°C | 14.8°C | |
| JUN 18 | 14.5°C | 14.8°C | |
| JUN 19 | 14.5°C | 14.7°C | |
| JUN 20 | 15.3°C | 14.6°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.
Water temperature data for this location is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.
Annual Water Temperature Overview by Month
Monthly Water Temp Ranges
Annual Water Temperature Trend
Southerndown, on the Vale of Glamorgan coast in Wales, is a rugged beach framed by cliffs and wide rock platforms that lead to sandy and pebbly shores. The sea here sits within the Bristol Channel and experiences marked seasonal variation in temperature. Typical winter surface temperatures (December–February) range from about 7–9 °C. Spring (March–May) brings a gradual rise to roughly 9–13 °C. In summer (June–August) the water is at its warmest, commonly between 14–18 °C, with occasional short-lived peaks up to around 19–20 °C during heatwaves. Autumn (September–November) usually sees a cooling trend, with temperatures commonly in the 11–15 °C bracket. These ranges reflect averages for surface water; actual conditions vary with weather, tides and recent sea temperatures.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 7°C | 9°C | 11°C |
| February | 6°C | 8°C | 10°C |
| March | 6°C | 8°C | 10°C |
| April | 8°C | 10°C | 12°C |
| May | 9°C | 12°C | 15°C |
| June | 12°C | 14°C | 17°C |
| July | 14°C | 17°C | 20°C |
| August | 16°C | 18°C | 20°C |
| September | 15°C | 17°C | 20°C |
| October | 13°C | 15°C | 18°C |
| November | 11°C | 13°C | 15°C |
| December | 8°C | 10°C | 13°C |
* Click on a month to view detailed water temperature data.
Southerndown: Weather Forecast
June 13
June 14
June 15
June 16
Location, Beaches & Local Information
Nearby Beaches & Facilities
Southerndown Beach
Dunraven Bay
Ogmore By Sea Beach
Witches Point
Temple Bay
Merthyr Mawr Beach
Traeth Mawr
Monknash Beach
Trecco Bay Beach
Swimming Conditions
Swimming at Southerndown can be rewarding but often brisk outside the warmest weeks. The beach is used for open-water swimming, shore-based paddling and watersports such as surfing and bodyboarding, but the strong tidal flows of the Bristol Channel and local underwater rocks mean swimmers should be cautious. Many visitors wear a wetsuit from spring through autumn except in the warmest summer spell, and cold-water swimmers treat winter dips with appropriate acclimatisation. Facilities and seasonal lifeguard cover can vary, so checking local information, tide times and weather forecasts before entering the water will help ensure a safer and more enjoyable beach holiday experience.