This is local beach from Alibag. Very average and crowded by too many tourist. Water is too muddy and not a good beach for swimming. Not clean as such. But you must visit beach for Kolaba fort. Bst place for history and fort lover.
The waters here are hardly better in quality than Mumbai since Alibaug is so close to the big city. The only'good' point is that there's less garbage floating in the water.