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Church Bay

Isle of Anglesey, Wales
Excellent Water Quality
Data last verified: 12 Nov 2026

Church Bay, a picturesque haven on the Isle of Anglesey, boasts a stunning shoreline of sand and shingle, surrounded by breathtaking coastal scenery. With an official annual water quality rating of Excellent, as tested by Natural Resources Wales, visitors can enjoy a refreshing dip in the crystal-clear waters. During the summer months, the water temperature typically ranges from 15°C to 18°C, making it an ideal spot for swimming and water activities.

9.1°C
Air Temp
22 mph
Wind Speed
Low Tide (1.5m)
in 4h 8m (05:28) • Spring Tide
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Live Water Quality

95
Excellent
Safe for swimming
• Updated 10 mins ago
Today's Conditions • Updated 10 mins ago

Lifeguards

Unknown
Help us verify

Air Temp

9.1°C
Comfortable

Weather

Partly cloudy
9.1°C

Tide

Low Tide (1.5m)
in 4h 8m (05:28) • Spring Tide

Water Quality

Excellent
Safe for swimming

Pollution Alerts

None
No alerts today

Quick Overview

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

Beach Information View all details

Beach Type
Sand, Shingle
Water Quality
Excellent
Avg. Air Temp
9.1°C
Swimming
Highly recommended

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Reference Information

🌊 Live Tide Curve, Tidal Range & 7-Day Schedule

Harmonic astronomical predictions, tidal coefficients & flow rate

Spring Tide • Coeff 87
Current Water Level
Falling ↓ (4.42m)
32% through current tide cycle (LAT)
Upcoming High & Low
▲ High: 11:38 (5.50m • in 10h 17m)
▼ Low: 05:28 (1.50m • in 4h 8m)
Tidal Range & Coefficient
Range: 4.03m (Coeff 87/120)
Large tidal range — faster tidal currents and higher high water.
Current Tidal Flow
Peak Ebbing Flow
Rule of Twelfths: fastest flow occurs in mid-tide hours 3 & 4.
📈 24-Hour Harmonic Tide Curve (LAT)
Station: Holyhead
6.2m 3.6m 0.9m 23:3003:3007:3011:3015:3019:30 Low 05:28 (1.5m)High 11:38 (5.5m)Low 17:50 (1.5m) NOW
📅 7-Day High & Low Tide Table
Day High & Low Tides (Local Time) Tidal Range Coeff / Phase
Wed 11 Nov ▼ Low 17:15 (1.31m)▲ High 23:24 (5.30m) 3.99m Spring (86)
Today ▼ Low 05:28 (1.50m)▲ High 11:38 (5.50m)▼ Low 17:50 (1.47m)▲ High 23:58 (5.13m) 4.03m Spring (87)
Fri 13 Nov ▼ Low 06:02 (1.71m)▲ High 12:12 (5.38m)▼ Low 18:27 (1.66m) 3.72m Coeff 80
Sat 14 Nov ▲ High 00:34 (4.94m)▼ Low 06:37 (1.94m)▲ High 12:49 (5.21m)▼ Low 19:07 (1.87m) 3.34m Coeff 71
Sun 15 Nov ▲ High 01:16 (4.74m)▼ Low 07:18 (2.19m)▲ High 13:32 (5.03m)▼ Low 19:54 (2.07m) 2.96m Coeff 62
Mon 16 Nov ▲ High 02:05 (4.56m)▼ Low 08:08 (2.41m)▲ High 14:25 (4.86m)▼ Low 20:51 (2.21m) 2.65m Coeff 55
Tue 17 Nov ▲ High 03:07 (4.43m)▼ Low 09:11 (2.57m)▲ High 15:28 (4.75m)▼ Low 21:57 (2.25m) 2.50m Coeff 51
Reference Station: Holyhead • Model: Primary Harmonic Gauge (TICON) • Datum: LAT Tide predictions via TidesAtlas
Next 4 Tides
Spring Tide
Low 05:28 1.50m
High 11:38 5.50m
Low 17:50 1.47m
High 23:58 5.13m
Current: Falling (4.42m) • Peak Ebbing Flow
Sediment Type
Sand, Shingle

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

Annual Rating
Excellent

Water quality is classified as excellent, meeting the highest cleanliness standards. Bacterial counts (E. coli & Intestinal Enterococci) are consistently low, posing negligible health risks.

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
2003

Officially designated as a protected bathing water site in 2003. 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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