Dive-site story
Les Écréhous forms an isolated reef and islet archipelago positioned between Jersey and the Cotentin Peninsula of France. Submerged granite ridges, kelp-covered gullies, and vertical drop-offs define the underwater terrain. Because the Channel Islands experience massive tidal ranges, currents sweep aggressively through the cuts between the islets, demanding strict slack-water dive planning. The exposed environment attracts pelagic visitors alongside thriving cold-temperate benthic communities.
Rugged offshore granite pinnacles and undercut gullies blanketed by encrusting fauna
Regular encounters with resident Atlantic grey seals hauling out on exposed sandbars and reefs
Abundant crustacean life sheltering within deep rock fissures and boulder fields
Location
Use the map to plan with your operator and confirm the exact entry point on the day.
Seasonality
Late summer and early autumn bring the warmest water temperatures and calmest weather windows.
Marine life
| Species | Likelihood | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grey SealHalichoerus grypus | Common | ||||||||||||
| Ballan WrasseLabrus bergylta | Common | ||||||||||||
| European LobsterHomarus gammarus | Common | ||||||||||||
| European Spider CrabMaja squinado | Seasonal | ||||||||||||
| Jewel AnemoneCorynactis viridis | Common | ||||||||||||
| Bottlenose DolphinTursiops truncatus | Seasonal |
Marine forecast
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