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Castle Beach, Tenby

Pembrokeshire, Wales
Excellent Water Quality
Data last verified: 27 Sep 2026

Tucked away in the picturesque town of Tenby, Castle Beach boasts a stunning stretch of golden sand, backed by medieval walls and a historic castle. The beach's excellent water quality, consistently rated by Natural Resources Wales, makes it an ideal spot for swimming and sunbathing. During the summer months, the water temperature typically reaches a pleasant 17°C, perfect for a refreshing dip.

12.1°C
Air Temp
9.7 mph
Wind Speed
Low Tide
in 6h 13m
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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
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Air Temp

12.1°C
Comfortable

Weather

Clear sky
12.1°C

Tide

Low Tide
in 6h 13m

Water Quality

Excellent
Safe for swimming

Pollution Alerts

None
No alerts today

Quick Overview

Sandy beach
Family friendly
Dog friendly
(winter)
Parking nearby
Toilets
Café

Beach Information View all details

Beach Type
Sand
Water Quality
Excellent
Avg. Air Temp
12.1°C
Swimming
Highly recommended

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Reference Information

Full Tide Times
High 19:28 4.2m
Low 01:46 -3.9m
High 07:45 4.0m
Low 14:00 -3.9m
Sediment Type
Sand

The shoreline consists primarily of sand. 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
1999

Officially designated as a protected bathing water site in 1999. This designation mandates regular public health monitoring.

County / District
Pembrokeshire

Governed under local district sanitation and environmental safety regulations in the Pembrokeshire area.

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