Écomusée sous-marin (Underwater Eco-Museum)

Set in 3-5 m of water on the south shore of Île Sainte-Marguerite, the site faces southeast (orientation 135 deg) into the open Ligurian Sea while the island shields it to the north from the dominant NW Mistral that drives most of the Bay of Cannes' wind-waves. Due south is also blocked: Île Saint-Honorat sits directly across the roughly 800 m Plateau du Milieu channel, so the only real exposure is the SE-ESE window past the island's eastern tips. That arc opens to the warm Scirocco (SE), which builds the largest wind-waves felt here; on those days the shallow sand stirs up and visibility drops. The SW-WSW sectors are partly screened by Saint-Honorat and the distant mainland, and with no real swell or current in the protected, no-anchoring zone conditions are otherwise calm and beginner-friendly, best in the morning before the sea breeze fills in.