NI Beaches

All beaches

Castlerock

North Coast · Causeway Coast and Glens Borough Council

Blue Flag 2026 Designated bathing water

Family beach at the mouth of the River Bann with a golf links and railway halt.

More on Wikipedia

Conditions now

Air 9°C Partly cloudy
Swell 0.7m period 8 s · NW
Rain 1mm last 48 hours

Water quality

A designated bathing water: DAERA samples it weekly through the bathing season (1 June–15 September).

Latest sample 14 Sep 2026: Excellent — E. coli 10, intestinal enterococci 10 CFU/100 ml

OldestMost recent
Sample history (40 shown)
DateE. coliEnt.RatingAlgae
14 Sep 2026 10 10 Excellent —
9 Sep 2026 17 25 Excellent —
4 Sep 2026 10 10 Excellent —
1 Sep 2026 12 10 Excellent —
28 Aug 2026 35 10 Excellent —
24 Aug 2026 10 10 Excellent —
20 Aug 2026 72 28 Excellent —
12 Aug 2026 10 10 Excellent —
6 Aug 2026 10 10 Excellent —
30 Jul 2026 20 10 Excellent —
29 Jul 2026 24 15 Excellent —
21 Jul 2026 36 10 Excellent —
16 Jul 2026 10 10 Excellent —
7 Jul 2026 10 10 Excellent —
1 Jul 2026 540 40 Satisfactory —
23 Jun 2026 10 10 Excellent —
19 Jun 2026 10 10 Excellent —
15 Jun 2026 10 10 Excellent —
3 Jun 2026 420 10 Good —
27 May 2026 10 10 Excellent —
15 Sep 2025 58 18 Excellent —
9 Sep 2025 10 13 Excellent —
1 Sep 2025 10 10 Excellent —
29 Aug 2025 10 10 Excellent —
21 Aug 2025 10 10 Excellent —
12 Aug 2025 10 10 Excellent —
6 Aug 2025 10 10 Excellent —
1 Aug 2025 57 40 Excellent —
28 Jul 2025 24 10 Excellent —
25 Jul 2025 20 10 Excellent —
17 Jul 2025 10 10 Excellent —
9 Jul 2025 21 10 Excellent —
1 Jul 2025 840 70 Satisfactory —
26 Jun 2025 30 10 Excellent —
23 Jun 2025 18 10 Excellent —
19 Jun 2025 10 10 Excellent —
13 Jun 2025 10 10 Excellent —
11 Jun 2025 10 10 Excellent —
4 Jun 2025 19 10 Excellent —
27 May 2025 40 10 Excellent —

Weekly lab samples, not real-time. Avoid bathing for 48 h after heavy rain. Bathing Water Profile (PDF).

Sewage & storm overflows

6 NI Water storm overflows within 1.2 mi — 6 rated Unsatisfactory.

Modelled~157 spills/yrNI Water's prediction, all 6 combined
Measured in 202565 spills44 h · 22 in the bathing season · 6 of 6 monitored
Nearest 6 overflows
OverflowDistanceClassificationModelled spills/yrMeasured 2025
Castlerock Promenade WwPS
→ Roe
310 yd Unsatisfactory ~1 8 spills
2 in season · <1 h
Promenade Castlerock CSO
→ Roe
310 yd Unsatisfactory — 7 spills
3 in season · 4 h
Main Street Swimming Pool CSO
→ Roe
730 yd Unsatisfactory ~104 33 spills
14 in season · 12 h
Liffock Park WwPS
→ Lower Bann
820 yd Unsatisfactory ~12 4 spills
1 in season · <1 h
Castlerock Coastguard WwPS
→ Roe
880 yd Unsatisfactory ~32 8 spills
1 in season · 18 h
Hezlett Primary School CSO
→ Lower Bann
1.0 mi Unsatisfactory ~8 5 spills
1 in season · 9 h
How these are counted

“Modelled” is NI Water's hydraulic-model prediction of spills per year. “Measured” is from NI Water's event duration monitors, counted with the industry 12/24 method (discharges within the same 12- or 24-hour block count as one spill); the bathing-season figure (1 Jun–15 Sep) is our count from NI Water's published discharge log. An overflow with no monitor isn't known to be dry. Classification is NI Water's own.

Nearest wastewater treatment works: Longs Glebe WwTW (1.4 mi → Lower Bann) · Ballyhacket Road 2-8 ST (1.9 mi → Roe).

Amenities & features

Parking 5
Toilets 2
Cafes & food e.g. Surf Shack 2
Pubs & bars e.g. Bertha's Bar 1
Shops e.g. Costcutter 1
Lifeguard 1
Picnic tables 9
Benches 7
Bike parking 1
Information 5
Bins 9
Blue Flag 2026 RNLI lifeguards in season

Dogs, access & rules

Seasonal dog restrictions Step-free / accessible Accessible parking
  • Dogs: Dogs excluded from the bathing strand 1 May–30 September under Causeway Coast & Glens byelaws; under control elsewhere. Council byelaw
  • Accessibility: Accessible toilets on site; accessible parking bays Tourism NI (self-assessed)

Rules and dates vary by council and season — check the signage at the entrance.

Boating — nearest harbours & marinas

  • Portstewart Harbour · Council · Causeway Coast & Glens 2.8 mi
  • Portrush Harbour · Council · Causeway Coast & Glens 5.5 mi
  • Portandhu Slipway · Causeway Coast and Glens 5.9 mi
2 more further away
  • Portballintrae Harbour · Council · Causeway Coast & Glens 10.0 mi
  • Dunseverick Harbour · Council · Causeway Coast & Glens 14.8 mi

Wildlife & designations

This beach lies in or within 0.6 mi of:

Alerts & advisories

Rip currents on surf beaches

The open Atlantic strands generate strong rip currents, particularly around low tide and after big swell. Swim between the red-and-yellow flags at lifeguarded beaches in season, never alone, and if caught in a rip do not swim against it: raise a hand, float, and let it carry you out until it releases.