Should I go to Yeşilköy public beach or the Princes’ Islands for a beach day from Istanbul, and which island is affordable?

For a quick beach day without taking a ferry, travelers mentioned the public beach in Yeşilköy, on the Sea of Marmara in Bakırköy. It is an in-city option, but check current beach and water conditions before heading out.

Do not choose Yassıada for nightlife or a standard beach outing: the island is associated with difficult political history and is primarily treated as a memorial and historical destination.

On a public holiday, the Princes’ Islands can be a useful alternative to central Istanbul if crowds or road closures are expected in the city. Expect busier ferries and more visitors on the islands, though.