Heddon's Mouth Sea Water Temperature
A temperate beach on the Celtic Sea, warmest around August at about 17.8°C. Today's reading, 7-day forecast, and monthly averages below.
Heddon's Mouth water temperature
Invigorating and crisp. Tolerable for active swimming, but chilly for prolonged casual bathing.
7-Day Water Temperature Forecast
Heddon's Mouth Monthly Water Temperature Averages
Historical monthly climatology. The warmest water in Heddon's Mouth occurs inJuly, August, September, October — peaking at17.8°C (64°F) in August.
Year-Round Water Temperature Curve (°C / °F)
Hover a bar for detailsFull 12-month data table — min / avg / max & swimming comfort
| Month | Min Water Temp | Average Water Temp | Max Water Temp | Swimming Comfort |
|---|---|---|---|---|
| January | 6.6°C | 8.5°C | 10.1°C | Very Cold (< 16°C) |
| February | 6.5°C | 7.7°C | 9°C | Very Cold (< 16°C) |
| March | 6.4°C | 7.9°C | 9.3°C | Very Cold (< 16°C) |
| April | 7.7°C | 9.4°C | 11.3°C | Very Cold (< 16°C) |
| May | 9.6°C | 11.6°C | 14.3°C | Very Cold (< 16°C) |
| June | 12.9°C | 14.4°C | 16°C | Very Cold (< 16°C) |
| July | 14.9°C | 16.5°C | 18.1°C | Cool / Refreshing (16°C – 20°C) |
| August | 16.6°C | 17.8°C | 18.5°C | Cool / Refreshing (16°C – 20°C) |
| SeptemberCurrent | 15.8°C | 17.2°C | 18.9°C | Cool / Refreshing (16°C – 20°C) |
| October | 13.3°C | 15.4°C | 17.2°C | Very Cold (< 16°C) |
| November | 10.4°C | 12.6°C | 14.8°C | Very Cold (< 16°C) |
| December | 8.9°C | 9.9°C | 11.8°C | Very Cold (< 16°C) |
Swimming FAQs for Heddon's Mouth
Is the sea warm enough to swim in Heddon's Mouth today?
Typical sea surface temperature in Heddon's Mouth this time of year is 17.2°C (63°F) — classified as Cool / Refreshing (16°C – 20°C). Invigorating and crisp. Tolerable for active swimming, but chilly for prolonged casual bathing. Live readings load automatically.
What are the warmest months for swimming in Heddon's Mouth?
The highest water temperatures in Heddon's Mouth typically occur duringJuly, August, September, October, when monthly averages reach peak seasonal levels.
What is the typical water temperature in Heddon's Mouth in September?
Historically in September, water temperatures in Heddon's Mouth average around17.2°C (63.0°F), fluctuating between a recorded minimum of 15.8°C and a maximum of 18.9°C.