St Margaret's Bay Sea Water Temperature
A temperate beach on the Irish Sea, warmest around August at about 17.7°C. Today's reading, 7-day forecast, and monthly averages below.
St Margaret's Bay water temperature
Invigorating and crisp. Tolerable for active swimming, but chilly for prolonged casual bathing.
7-Day Water Temperature Forecast
St Margaret's Bay Monthly Water Temperature Averages
Historical monthly climatology. The warmest water in St Margaret's Bay occurs inJuly, August, September, October — peaking at17.7°C (63.9°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 | 6.4°C | 9°C | 11.9°C | Very Cold (< 16°C) |
| February | 5.2°C | 7.9°C | 9.7°C | Very Cold (< 16°C) |
| March | 5.8°C | 7.9°C | 9.4°C | Very Cold (< 16°C) |
| April | 7.1°C | 9.1°C | 11°C | Very Cold (< 16°C) |
| May | 9.8°C | 11.5°C | 13.8°C | Very Cold (< 16°C) |
| June | 12.2°C | 13.9°C | 16.5°C | Very Cold (< 16°C) |
| July | 15°C | 16.3°C | 19.2°C | Cool / Refreshing (16°C – 20°C) |
| August | 16.4°C | 17.7°C | 19.7°C | Cool / Refreshing (16°C – 20°C) |
| SeptemberCurrent | 16°C | 17.6°C | 19.8°C | Cool / Refreshing (16°C – 20°C) |
| October | 14.8°C | 16°C | 17.9°C | Cool / Refreshing (16°C – 20°C) |
| November | 11.3°C | 13.5°C | 16.1°C | Very Cold (< 16°C) |
| December | 8.8°C | 10.9°C | 13.4°C | Very Cold (< 16°C) |
Swimming FAQs for St Margaret's Bay
Is the sea warm enough to swim in St Margaret's Bay today?
Typical sea surface temperature in St Margaret's Bay this time of year is 17.6°C (63.7°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 St Margaret's Bay?
The highest water temperatures in St Margaret's Bay typically occur duringJuly, August, September, October, when monthly averages reach peak seasonal levels.
What is the typical water temperature in St Margaret's Bay in September?
Historically in September, water temperatures in St Margaret's Bay average around17.6°C (63.7°F), fluctuating between a recorded minimum of 16°C and a maximum of 19.8°C.