Portland Harbour Castle Cove

13.1°C Water temp · May 5

United Kingdom Coastal 1 - Excellent 13.1°C

Portland Harbour Castle Cove is in Portland Harbour on the Dorset coast. It is a sheltered sandy cove, approximately 220 metres wide, backed by cliffs.

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Water

Coastal bathing water

Location

Dorset

Season

Designated bathing water since 1988. Official monitoring season runs from May to September.

Water Quality

Excellent (2025). Assessed under rBWD

Risks

There is an emergency/storm overflow from the Castle Cove pumping station, that discharges to Portland Harbour 130 metres from the Environment Agency monitoring point. The operation of the overflow can lead to a drop in water quality at the bathing water. This bathing water is included in the Surfers Against Sewage “Safer Seas Service”. This service can alert you to Combined Storm Sewer Overflow discharges via a phone App and in addition, it includes the Environment Agency Pollution Risk Forecast warnings where they are available. Further details of the service can be found at - http://www.sas.org.uk/safer-seas-service/