NI Beaches
Portstewart

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Portstewart

North Coast · National Trust · Coastal

Designated bathing water

National Trust strand and dunes at the western edge of the town.

More on Wikipedia

Conditions now

Air 13°C Drizzle
Sea temp 15.8°C surface, modelled
Wind 18mph from NW · gust 33 mph
Sea state2.7 mperiod 8 s · NW
Swell1.5 m9 s · NW
Rain, 48 h3 mm

Water quality

Latest sample 4 Sep 2026: Excellent — E. coli 10, intestinal enterococci 10 CFU/100 ml

OldestMost recent
Sample history (40 shown)
DateE. coliEnt.RatingAlgae
4 Sep 2026 10 10 Excellent
1 Sep 2026 10 10 Excellent
28 Aug 2026 10 10 Excellent
24 Aug 2026 10 10 Excellent
20 Aug 2026 10 10 Excellent
12 Aug 2026 10 10 Excellent
6 Aug 2026 24 10 Excellent
30 Jul 2026 10 10 Excellent
29 Jul 2026 12 10 Excellent
21 Jul 2026 10 10 Excellent
16 Jul 2026 10 10 Excellent
7 Jul 2026 10 10 Excellent
1 Jul 2026 270 20 Good
23 Jun 2026 13 10 Excellent
19 Jun 2026 10 10 Excellent
15 Jun 2026 10 10 Excellent
3 Jun 2026 10 10 Excellent
3 Jun 2026 10 0 Excellent
3 Jun 2026 0 0 NoBathing
27 May 2026 10 10 Excellent
3 Nov 2025 0 0 Excellent
27 Oct 2025 0 0 NoBathing yes
28 Sep 2025 0 0 Excellent
21 Sep 2025 0 0 NoBathing yes
15 Sep 2025 10 10 Excellent
9 Sep 2025 15 11 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 12 10 Excellent
28 Jul 2025 10 10 Excellent
25 Jul 2025 10 10 Excellent
17 Jul 2025 10 10 Excellent
9 Jul 2025 11 10 Excellent
1 Jul 2025 10 10 Excellent
26 Jun 2025 10 10 Excellent
23 Jun 2025 12 10 Excellent
19 Jun 2025 10 10 Excellent

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

Sewage & storm overflows

4 NI Water storm overflows within 1.2 mi — 2 rated Unsatisfactory · 3 monitored. Modelled ~28 spills/year combined.

Nearest 4
OverflowDistanceClassificationSpills/yrMonitored
Winston Drive Regent CSO
→ Bush
830 yd Satisfactory yes
Berrins WwPS
→ Bush
0.5 mi Unsatisfactory ~18 yes
Crescent Portstewart WwPS
→ Portstewart Bay
0.9 mi Unsatisfactory ~10 yes
The Crescent CSO
→ Portstewart Bay
0.9 mi Satisfactory

Nearest wastewater treatment works: Dartress WwTW (2.1 mi → Bann Brook) · Bellany WwTW (2.2 mi → Bann Brook).

Spill figures are modelled annual predictions, not measured events. Classification is NI Water's own.

Amenities nearby & features

Dogs, access & rules

Seasonal dog restrictions Cars allowed on the sand
  • Dogs: National Trust strand: dogs must be on a lead near the bathing area and away from the tern-nesting fenced zone; a seasonal dog exclusion applies to the central beach. Council byelaw
  • Vehicles on the sand: National Trust — drive onto and park on the strand (fee); closed when the tide or conditions require. (Editorial)
Parking 3
Toilets 1
Cafes & food e.g. Harry's Shack 3

Boating — nearest harbours & marinas

  • Portstewart Harbour · Council · Causeway Coast & Glens 1.2 mi
  • Portrush Harbour · Council · Causeway Coast & Glens 3.7 mi
  • Portandhu Slipway · Causeway Coast and Glens 4.1 mi
  • Portballintrae Harbour · Council · Causeway Coast & Glens 8.0 mi
  • Dunseverick Harbour · Council · Causeway Coast & Glens 12.8 mi

Kind and ownership are DAERA's own classification. The feed carries no per-site facility data — call ahead for berthing, fuel, water or shore power.

Wildlife & designations

This beach lies in or within 0.6 mi of:

Alerts & advisories

Weever fish

Lesser weever fish bury themselves in wet sand around the low-tide line in summer and have venomous dorsal spines. Wear beach shoes and shuffle your feet in the shallows. A sting is intensely painful but rarely serious: immerse the foot in water as hot as you can tolerate (about 40 C) for 30-90 minutes and seek help if a spine remains or swelling spreads.

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.

Midges and clegs

Biting midges and clegs (horseflies) are worst on warm, still, overcast days and around dawn and dusk from late spring to early autumn, especially near dunes, marram grass and standing water. A breeze off the sea keeps them down. Cover up or use repellent at the back of the beach.

Jellyfish

Lion's mane and compass jellyfish are common off the Northern Ireland coast in summer and are often blown inshore and stranded after onshore winds. Lion's mane stings can be severe. Do not rub a sting; rinse with seawater, remove tentacles with a gloved hand or card, and use hot water or a cold pack for pain.

Seasonal dog restrictions

Many Northern Ireland councils restrict dogs from the main bathing area, or require dogs on leads, between 1 May and 30 September (Blue Flag beaches usually exclude dogs from the bathing zone entirely in season). Rules and dates vary by beach and council: check the signage at the entrance and your council's bathing-beach byelaws.