Carrowniskey, Louisburgh
Good to go
No current pollution alerts — always assess conditions yourself.
Checked against the Environmental Protection Agency (Ireland) · data last changed 1 month ago.
Sea conditions
Water temperature
14.4°C
Chilly — most swimmers want a wetsuit
Wave height
0.6 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.
About this spot
Carrowniskey Beach is a large sandy, gradually sloping beach open to the west. Carrowniskey Beach is an exposed beach and can be subject to rip tides/strong currents. There are a number of different habitats including sand hills and an area of machair, three lagoon type lakes and their associated riverine channels. The Lagoon habitat is of extreme ecological importance. Carrowniskey Beach forms part of the Lough Cahasy, Lough Baun and Roonah Lough Special Area of Conservation (cSAC) and proposed National Heritage Area (pNHA) (Site Code 001529). The bathing water is approximately 0.8km2 in area however the beach extends approximately 1.7km. The medium and maximum water depth within the designated bathing water is 0.5m and 5.0m respectively depending on tides.
This spot’s record
Carrowniskey, Louisburgh is in Mayo, about 6 km from Louisburgh. Carrowniskey, Louisburgh has been rated Excellent in each of the 4 bathing seasons classified by the Environmental Protection Agency (Ireland), 2022 through 2025. In the previous bathing season Carrowniskey, Louisburgh was under a short-term pollution restriction on 19 days. That is last season's record and not a forecast for today. Across the 12 most recent samples published by the Environmental Protection Agency (Ireland), E. coli counts ranged from 10 to 180 per 100 ml. The highest was taken on 8 June 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 |
|---|---|---|---|
| 2 Sept | 10 | 8 | Excellent |
| 24 Aug | 10 | 1 | Excellent |
| 10 Aug | 10 | 1 | Excellent |
| 20 Jul | 10 | 3 | Excellent |
| 6 Jul | 40 | 2 | Excellent |
| 22 Jun | 10 | 1 | 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.
Quality over the last 4 years
- Excellent2022
- Excellent2023
- Excellent2024
- Excellent2025
This water has been rated Excellent in each of the last 4 years.
Facilities & access
- Lifeguard
- Yes
- Parking
- Yes
- Toilets
- Yes
- Accessible entry
- No
- Dogs
- Yes
- Public transport
- No
Official water quality
Classified Excellent in 2025.
Carrowniskey, Louisburgh is classified as achieving Excellent Water Quality in 2025 based on the assessment of bacteriological results for the period 2022 to 2025. Carrowniskey, Louisburgh achieved an Excellent Water Quality rating for the four consecutive years 2022 to 2025. Annual water quality ratings are generally calculated using monitoring results over a four-year period and are assessed against stringent bacterial limits to protect bather health.
Official bathing-water profileCommon questions
- Can you swim at Carrowniskey, Louisburgh right now?
- Carrowniskey, Louisburgh is currently marked "Good to go". No current pollution alerts — always assess conditions yourself. This reflects the latest data published by the Environmental Protection Agency (Ireland). Conditions change quickly — always assess the water yourself before entering.
- What is the water quality like at Carrowniskey, Louisburgh?
- the Environmental Protection Agency (Ireland) classified Carrowniskey, Louisburgh 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 Carrowniskey, Louisburgh?
- There are no active bathing restrictions published by the Environmental Protection Agency (Ireland) for Carrowniskey, Louisburgh. That is not a guarantee of safety — assess conditions yourself.
- Is there a lifeguard at Carrowniskey, Louisburgh?
- Yes — Carrowniskey, Louisburgh has lifeguard cover. Cover is seasonal; check locally before relying on it.
- What facilities are there at Carrowniskey, Louisburgh?
- Carrowniskey, Louisburgh has toilets, parking. Facility information is published by the Environmental Protection Agency (Ireland).
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Nearby swimming spots
See all swimming spots near Louisburgh — about 6 km away.