Blue Lagoon Abereiddy Water Temperature Today
Blue Lagoon Abereiddy, a flooded quarry swim site in Wales, United Kingdom. The water stays cool at its summer peak — good for a short, bracing swim, and is cold but ice-free in winter.
In August Blue Lagoon Abereiddy averages about 17°C, peaking near 17°C in July, August, September and dropping to roughly 8°C at its coldest.
River and swimming-hole temperatures are modelled from long-term monthly averages and refined with live air temperature, wind and UV. Moving water reacts faster to the weather than a lake or the sea.
Blue Lagoon Abereiddy water temperature by month
| Month | Average water temperature | Swimming |
|---|---|---|
| January | 8.6°C | cold |
| February | 8.0°C | cold |
| March | 8.6°C | cold |
| April | 10.3°C | cool |
| May | 12.5°C | cool |
| June | 14.8°C | cool |
| July | 16.4°C | mild |
| August | 17.0°C | mild |
| September | 16.4°C | mild |
| October | 14.8°C | cool |
| November | 12.5°C | cool |
| December | 10.3°C | cool |
Blue Lagoon Abereiddy swim conditions FAQ
What is the water temperature in Blue Lagoon Abereiddy right now?
In August the water in Blue Lagoon Abereiddy averages about 17°C. We refine that long-term average with today's air temperature, because this flooded quarry responds quickly to the weather.
When is the best time to swim in Blue Lagoon Abereiddy?
Water here stays below 18°C all year, peaking near 17°C in July, August, September. Most swimmers use a wetsuit and keep swims short.
Can you swim in Blue Lagoon Abereiddy in winter?
Yes, but winter temperatures drop to roughly 8°C. Below 12°C, cold-water shock is the main risk: enter slowly, never swim alone, and limit time in the water.
Is Blue Lagoon Abereiddy safe for swimming?
Moving and inland water carries different risks from the sea: check flow after rain, avoid weirs and undercut banks, look for submerged rocks before jumping, and respect local access rules and water-quality notices.
Water safety tips
- Check the flow rate after heavy rain — inland water can rise and speed up within hours.
- Never jump before checking depth and submerged rocks; levels change through the season.
- Enter slowly to control cold-water shock, and get out before you start shivering.
- Swim with someone else and agree an exit point downstream before you start.
- Flooded quarries are deep and steeply shelved, with sharp thermoclines a metre or two down.
Swim season here: cold-water swimming all year.
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