Coliemore Harbour
Not monitored
This spot isn't an officially designated bathing water, so it has no annual classification and no pollution-alert monitoring. The EPA does sample it: the most recent reading was rated excellent. Assess conditions yourself before entering.
Checked against the Environmental Protection Agency (Ireland) · data last changed 2 months ago.
Sea conditions
Water temperature
14.1°C
Chilly — most swimmers want a wetsuit
Wave height
0.9 m
Significant wave height offshore; inshore conditions vary.
Tide
Coming in
- High water around UTC
- Low 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.
About this spot
Coliemore Harbour is located close to Dalkey village in Co. Dublin and is a picturesque harbour used for fishing and leisure boating.
This spot’s record
Coliemore Harbour is in Dublin, about 8 km from Bray. Across the 12 most recent samples published by the Environmental Protection Agency (Ireland), E. coli counts ranged from 10 to 884 per 100 ml. The highest was taken on 4 August 2026. A classification is calculated from percentiles across four seasons, so no single reading decides how this water is rated.
Recent sample results
The last 12 bacterial samples published by the Environmental Protection Agency (Ireland), 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 |
|---|---|---|---|
| 14 Sept | 52 | 4 | Excellent |
| 7 Sept | 10 | 12 | Excellent |
| 31 Aug | 63 | 32 | Excellent |
| 24 Aug | 10 | 5 | Excellent |
| 17 Aug | 52 | 21 | Excellent |
| 10 Aug | 85 | 4 | Excellent |
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.
Facilities & access
- Lifeguard
- No
- Parking
- No
- Toilets
- No
- Accessible entry
- No
- Dogs
- NoDogs must be kept under effectual control
- Public transport
- No
Official water quality
This spot has no official annual classification.
Common questions
- Can you swim at Coliemore Harbour right now?
- Coliemore Harbour is currently marked "Not monitored". This spot isn't an officially designated bathing water, so it has no annual classification and no pollution-alert monitoring. The EPA does sample it: the most recent reading was rated excellent. Assess conditions yourself before entering. This reflects the latest data published by the Environmental Protection Agency (Ireland). Conditions change quickly — always assess the water yourself before entering.
- Is there a lifeguard at Coliemore Harbour?
- No lifeguard cover is listed for Coliemore Harbour. Never swim alone at an unguarded spot.
Get told when this changes
We’ll email you when the swim status at Coliemore Harbour moves — a pollution alert opening, or one lifting. Not a newsletter: only this spot, only when it changes, at most once every 12 hours.
Your address is used for these alerts and nothing else, is never shared, and is deleted the moment you unsubscribe — a link is in every email.
Nearby swimming spots
See all swimming spots near Bray — about 8 km away.