The best time to visit Arambol is from early December to late February. I went in early December, it was quiet(it was after New Years Eve, and I struggled to find accommodation and prices had gone up, not the amount of people). We were paying 150 rupees for a large room on a very sparsely populated area and super quiet, the bathroom was shared, yes, but it was a clean and in a perfect setting. In high season you can pay up 800rps. Depending on the site, the accommodation on the beach is more expensive. The village offers a considerable amount of small restaurant of all kinds, Tibetan food, typical local Indian, very fresh fish in the restaurants of Cliff.