Portland Harbour Castle Cove water quality history

Explore historical Environment Agency samples and annual bathing water classifications for Portland Harbour Castle Cove in Dorset.

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.

Available sample history
1988 to 2026
Samples
673
Latest official classification
Excellent (2025)

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Annual classification history

Official assessments and historical estimates are labelled separately. Missing years are not filled in.

Available annual results, newest first
YearClassificationAssessment source
2025ExcellentOfficial Environment Agency assessment
2024ExcellentOfficial Environment Agency assessment
2023ExcellentOfficial Environment Agency assessment
2022ExcellentOfficial Environment Agency assessment
2021ExcellentOfficial Environment Agency assessment
2019ExcellentOfficial Environment Agency assessment
2018ClosedOfficial Environment Agency assessment
2017ClosedOfficial Environment Agency assessment
2016ClosedOfficial Environment Agency assessment
2015ClosedOfficial Environment Agency assessment
2014GoodOfficial Environment Agency assessment
2013ExcellentOfficial Environment Agency assessment
2012GoodOfficial Environment Agency assessment
2011ExcellentOfficial Environment Agency assessment
2010ExcellentOfficial Environment Agency assessment
2009GoodHistorical estimate
2008GoodHistorical estimate
2007GoodHistorical estimate
2006GoodHistorical estimate
2005GoodHistorical estimate
2004GoodHistorical estimate
2003SufficientHistorical estimate
2002SufficientHistorical estimate
2001SufficientHistorical estimate
2000SufficientHistorical estimate
1999SufficientHistorical estimate
1998SufficientHistorical estimate
1997SufficientHistorical estimate
1996SufficientHistorical estimate
1995SufficientHistorical estimate
1994SufficientHistorical estimate
1993SufficientHistorical estimate
1992SufficientHistorical estimate
1991GoodHistorical estimate
1990GoodHistorical estimate
1989Not assessedHistorical estimate
1988Not assessedHistorical estimate

Source: Environment Agency / Swimfo. Data retrieved 16 October 2026. Historical trends do not describe conditions today; check Swimfo and local notices for current advice.

Nearby bathing waters