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Trearddur Bay

Isle of Anglesey, Wales
Good Water Quality
Data last verified: 08 Aug 2026

Nestled within Isle of Anglesey, Wales, Trearddur Bay provides a welcoming sandy stretch of coastline. Having been designated as an official bathing water site in 1988, the location undergoes routine water quality assessments, currently rated Good. In addition, dogs are permitted during winter months.

15.9°C
Air Temp
16.2 mph
Wind Speed
Low Tide
in 4h 13m
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Live Water Quality

80
Good
Safe for swimming
Updated 10 mins ago
Today's Conditions Updated 10 mins ago

Lifeguards

Unknown
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Air Temp

15.9°C
Comfortable

Weather

Partly cloudy
15.9°C

Tide

Low Tide
in 4h 13m

Water Quality

Good
Safe for swimming

Pollution Alerts

None
No alerts today

Quick Overview

Sand & Rocky beach
Family friendly
Dog friendly
(winter)
Parking nearby
Toilets
Café

Beach Information View all details

Beach Type
Rock, Sand
Water Quality
Good
Avg. Air Temp
15.9°C
Swimming
Highly recommended

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Cuffed-in Coffee The Hive
coffee shop
4.8 • 120m away
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Reference Information

Full Tide Times
High 05:46 1.1m
Low 12:30 -1.2m
High 18:31 1.2m
Low 01:16 -1.3m
Sediment Type
Rock, Sand

The shoreline consists primarily of rock, sand. Sediment type dictates underfoot comfort, wave energy absorption, and the water's clarity when currents stir up the seabed.

Annual Rating
Good

Water quality is clean and fully compliant with safety directives. It regularly meets bacterial limits under standard environmental conditions.

Rainfall Impact
High Risk

Bacterial levels are highly susceptible to storm runoff. Heavy rainfall in the local catchment is likely to trigger storm overflows and agricultural runoff, rendering the water temporarily unsafe.

Monitoring Authority
Environment Agency

Tested weekly by the Environment Agency England for bacteria levels (E. coli & Intestinal Enterococci) between May and September.

Water Body Type
Coastal Beach

Monitored as a coastal beach. Coastal beaches are subject to tidal flows and marine dilution, whereas inland lakes/rivers suffer from low water circulation, meaning bacteria can linger longer.

Sewerage Provider
Unknown

Unknown is the regional utility responsible for waste water treatment, sewage infrastructure, and storm overflow management in this catchment area.

Designated Year
1988

Officially designated as a protected bathing water site in 1988. This designation mandates regular public health monitoring.

County / District
Isle of Anglesey

Governed under local district sanitation and environmental safety regulations in the Isle of Anglesey area.

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