Castle Beach, Tenby
Good to go
No current pollution alerts — always assess conditions yourself.
Checked against the Environment Agency (England) · data last changed 3 hours ago.
Sea conditions
Water temperature
20.7°C
Mild by Irish and British standards
Wave height
0.4 m
Significant wave height offshore; inshore conditions vary.
Tide
Going out
- Low water around UTC
- High water around UTC
Modelled values, not measurements — coastal water often differs from the open-sea model, and tide times are approximate to within about half an hour. Use official tide tables for anything that depends on precise timing.
Recent sample results
The last 12 bacterial samples published by the Environment Agency (England), most recent on the right. Counts are per 100 ml of water.
Dashed line: 500 E. coli per 100 ml, the Bathing Water Directive guide value for coastal / transitional waters.
| Date | E. coli | Enterococci | Assessment |
|---|---|---|---|
| 5 Aug | 10 | 10 | — |
| 24 Jul | 18 | 10 | — |
| 8 Jul | 10 | 10 | — |
| 22 Jun | 27 | 10 | — |
| 9 Jun | 10 | 10 | — |
| 29 May | 10 | 10 | — |
A bathing water's official classification is calculated from percentiles across four bathing seasons, not from any single sample — so one high reading doesn't mean a spot is unsafe, and one low reading doesn't mean it's clean today.
Official water quality
Classified Excellent in 2025.
Official bathing-water profileCommon questions
- Can you swim at Castle Beach, Tenby right now?
- Castle Beach, Tenby is currently marked "Good to go". No current pollution alerts — always assess conditions yourself. This reflects the latest data published by the Environment Agency (England). Conditions change quickly — always assess the water yourself before entering.
- What is the water quality like at Castle Beach, Tenby?
- the Environment Agency (England) classified Castle Beach, Tenby as Excellent in 2025. Classifications are a rolling assessment of bacterial samples taken over four bathing seasons, measured against E. coli and intestinal enterococci limits set by the EU Bathing Water Directive.
- Is there a swimming ban or warning at Castle Beach, Tenby?
- There are no active bathing restrictions published by the Environment Agency (England) for Castle Beach, Tenby. That is not a guarantee of safety — assess conditions yourself.