Heddon's Mouth — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Heddon's Mouth (England, 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 Heddon's Mouth help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Heddon's Mouth 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 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear.
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
Currently, the sea water temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in Heddon's Mouth will be 14.9°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 | 14.8°C | 13.8°C | |
| JUN 6 | 14.7°C | 14.0°C | |
| JUN 7 | 14.8°C | 14.3°C | |
| JUN 8 | 14.7°C | 13.3°C | |
| JUN 9 | 14.7°C | 13.8°C | |
| JUN 10 | 14.5°C | 14.3°C | |
| JUN 11 | 14.6°C | 14.3°C | |
| JUN 12 | 14.7°C | 14.3°C | |
| JUN 13 | 14.7°C | 14.3°C | 14.7°C |
| JUN 14 | 14.0°C | 14.7°C | |
| JUN 15 | 13.8°C | 14.8°C | |
| JUN 16 | 14.5°C | 14.8°C | |
| JUN 17 | 14.0°C | 14.8°C | |
| JUN 18 | 14.3°C | 14.9°C | |
| JUN 19 | 14.8°C | 14.9°C | |
| JUN 20 | 15.0°C | 14.9°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
Heddon’s Mouth is a small, rugged cove on the North Devon coast at the mouth of the Heddon Valley, known for its rocky shoreline and wooded cliffs. The sea here follows the typical temperate North Atlantic pattern for this part of England, with distinctly cooler water outside the summer months. Average winter temperatures are around 7–9 °C, early spring usually sees 9–13 °C, and the warmest months of July and August typically bring surface temperatures in the range of 13–17 °C. Early autumn commonly brings waters back down to roughly 10–14 °C as Atlantic weather systems cool the channel. These figures are approximate and local conditions such as onshore winds, recent weather and tidal state can cause short-term variations.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 7°C | 9°C | 11°C |
| February | 7°C | 8°C | 10°C |
| March | 7°C | 8°C | 10°C |
| April | 8°C | 9°C | 12°C |
| May | 9°C | 12°C | 14°C |
| June | 11°C | 14°C | 17°C |
| July | 13°C | 16°C | 19°C |
| August | 15°C | 17°C | 20°C |
| September | 15°C | 17°C | 19°C |
| October | 13°C | 16°C | 18°C |
| November | 11°C | 13°C | 16°C |
| December | 8°C | 10°C | 13°C |
* Click on a month to view detailed water temperature data.
Heddon's Mouth: Weather Forecast
June 14
June 15
June 16
Location, Beaches & Local Information
Nearby Beaches & Facilities
Heddon's Mouth Beach
Woody Bay Beach
Jennifried's Cove Beach
Lee Bay Beach
Wringcliff Beach
Lynmouth Beach
Blacklands Beach
Combe Martin Bay Beach
Newberry Beach
Swimming Conditions
Swimming at Heddon’s Mouth is possible but more suited to experienced or prepared visitors rather than casual beach-goers. The cove is small and often pebbly or rocky rather than sandy, with limited space at low and high tide, and there are no lifeguards or formal facilities. In summer, when the water reaches its warmest, many swimmers choose to use a wetsuit to extend comfort and safety; outside summer it is generally too cold for unprotected swimming for prolonged periods. Tidal flows, submerged rocks and sudden swell can create hazards, so swimming with a companion, checking tide times and local weather, and using appropriate protective gear are advisable. For those seeking a beach holiday experience, Heddon’s Mouth offers dramatic scenery and wild swimming opportunities but does not provide the safer, amenity-rich conditions of managed bathing beaches.