Trearddur Bay, a picturesque beach on the Isle of Anglesey in Wales, boasts a stunning rock and sand shoreline. The official water quality rating, tested by Natural Resources Wales, is consistently classified as Good. During the summer months, the water temperature in Trearddur Bay can reach a pleasant 17°C, making it an ideal spot for swimming and water activities.
Hand-picked holiday cottages & coastal retreats near Trearddur Bay (Isle of Anglesey) & surrounds
Rural Retreats
From £3,046
Wern Manor is a magnificent Grade II listed manor house located between Porthmadog and Criccieth, with The Butler's House attached to the manor, situated in the old stable court...
Rural Retreats
From £3,696
Wern Manor is a magnificent Grade II listed manor house located between Porthmadog and Criccieth, with two beautiful cottages attached to the manor, situated in the old stable c...
Rural Retreats
From £2,546
Wern Manor is a magnificent Grade II listed manor house situated between Porthmadog and Criccieth. Whether you enjoy exploring the 15 acre grounds or indulging in the games room...
Rural Retreats
From £412
This renovated 1950s fairground travelling-van overlooks the Mawddach Estuary near Dolgellau in the southern reaches of the Snowdonia National Park. Situated at the head of the ...
Rural Retreats
From £430
This renovated 1950s fairground travelling-van overlooks the Mawddach Estuary near Dolgellau in the southern reaches of the Snowdonia National Park. Situated at the head of the ...
Rural Retreats
From £667
Ty Newydd is a period farmhouse on the Bodnant Estate, occupying a prominent position with breathtaking views over the Conwy estuary and towards the Carneddau Mountains of Snowd...
Rural Retreats
From £403
This secluded cottage is part of a small working farm high above Bodnant Gardens and two miles from the village of Eglwysbach. It enjoys stunning views of Snowdonia National Par...
Rural Retreats
From £585
Bryn Derw is a delightful and secluded cottage. Nestling in woodland and overlooking a field, it is completely tranquil. The property is located in the heart of the beautiful Bo...
Harmonic astronomical predictions, tidal coefficients & flow rate
| Day | High & Low Tides (Local Time) | Tidal Range | Coeff / Phase |
|---|---|---|---|
| Wed 11 Nov | ▼ Low 17:16 (1.33m)▲ High 23:23 (5.32m) | 3.99m | Spring (88) |
| Today | ▼ Low 05:26 (1.47m)▲ High 11:39 (5.45m)▼ Low 17:53 (1.50m)▲ High 23:59 (5.15m) | 3.98m | Spring (88) |
| Fri 13 Nov | ▼ Low 05:59 (1.68m)▲ High 12:13 (5.31m)▼ Low 18:30 (1.69m) | 3.63m | Coeff 79 |
| Sat 14 Nov | ▲ High 00:37 (4.95m)▼ Low 06:35 (1.91m)▲ High 12:50 (5.14m)▼ Low 19:12 (1.89m) | 3.25m | Coeff 70 |
| Sun 15 Nov | ▲ High 01:19 (4.74m)▼ Low 07:15 (2.14m)▲ High 13:31 (4.96m)▼ Low 20:00 (2.07m) | 2.89m | Coeff 61 |
| Mon 16 Nov | ▲ High 02:10 (4.55m)▼ Low 08:03 (2.36m)▲ High 14:23 (4.78m)▼ Low 21:00 (2.21m) | 2.57m | Coeff 53 |
| Tue 17 Nov | ▲ High 03:13 (4.42m)▼ Low 09:06 (2.51m)▲ High 15:31 (4.66m)▼ Low 22:09 (2.24m) | 2.42m | Neap (49) |
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.
Water quality is clean and fully compliant with safety directives. It regularly meets bacterial limits under standard environmental conditions.
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.
Tested weekly by the Environment Agency England for bacteria levels (E. coli & Intestinal Enterococci) between May and September.
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.
Unknown is the regional utility responsible for waste water treatment, sewage infrastructure, and storm overflow management in this catchment area.
Officially designated as a protected bathing water site in 1988. This designation mandates regular public health monitoring.
Governed under local district sanitation and environmental safety regulations in the Isle of Anglesey area.
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