Grandes Rocques


Grandes Rocques
© Geograph

Water Quality

Annual classification


Today's forecast

Forecasts are not available for this location.

Situated on the Island’s west coast, this sandy beach is great for families. The landscape is an attractive mix of sand dunes and pink granite rocky headland with fortifications as well as great rock pools. Sunsets can be exceptional.


Swimming, fishing and snorkeling are popular here.

Wildlife and Walks

Grandes Rocques is located at the start of Guernsey’s 14km west coast footpath and cycle route. Port Soif Nature Trail and the Saumarez Nature trail are also located nearby. There is a diverse range of wildlife here.

What's tested here?

Water samples are taken voluntarily at this beach by States of Guernsey from 15th May to 30th September.

Water samples do not need to be taken at this beach and may not be treated in the same way as designated bathing waters, but they are collected in the spirit of the Bathing Waters Directive.
Why isn't this a designated bathing water?

High levels of bacteria in the water can indicate pollution from sewage treatment works or polluted rain water draining from the land.
Where does pollution comes from and how can you help?

Water quality can be reduced for up to 72 hours after heavy rain. Look out for temporary signs at the beach and on our website.

Annual classification


What does this mean?

At the end of every bathing season the water quality is classified as either:

Excellent — the highest classification meaning the water is cleanest

Good — generally good water quality

Sufficient — meets minimum standards

Poor — You are advised not to swim. The beach will stay open and an action plan should be in place to improve the water quality.

Today's forecast

Forecasts are not available for this location.

More information about potential pollution sources and improvement plans.


This Weather Widget is provided by the Met Office

Tide times

Potential hazards at this beach

This beach is not yet classified, please see our safety tips below or contact the local beach operator for further information.

Lifeguarded locations - top five safety tips

Non-lifeguarded locations For those who can’t make it to a lifeguarded beach

For more information visit

Facilities at Grandes Rocques

Food Food Toilets Toilets Bins Bins



There is ample parking next to the beach.

Dog restrictions


Dogs permitted all year, dog litter bins provided.

Beach cleaning

Beach manually cleaned daily during the summer and weekly the rest of the year