Blue Cave

Set on the northeast-facing coast of Alonissos, the cavern looks out over the open NW Aegean, so the NE-to-E sectors take the full brunt of wind-driven sea while the island mass shelters all the landward W, SW and S quadrants. The dominant threat is the summer Meltemi (N-NW), which wraps around the headland and reaches the N/NNW sectors even though the cove itself faces northeast; on a stiff Meltemi day surge builds and the site is often called off. Being microtidal Mediterranean water there is no meaningful swell groundswell, only fetch-limited wind chop.