Tallinn Bay (Estonian: Tallinna laht) is a bay in Estonia on the southern coast of the Gulf of Finland. The Estonian capital city Tallinn is located on the southern coast of the bay.[1]
Tallinn Bay itself is divided into several parts: Tallinn Roadstead (Estonian: Tallinna reid), Kopli Bay, Kakumäe Bay and Paljassaare Bay.[1] The islands Naissaar and Aegna border the bay in the north, the Viimsi Peninsula to the east.
The shore waters are shallow but become deep rapidly. Tallinn Bay has a steep slope, which allows for good water exchange with the waters of the Gulf of Finland.[2] Tallinn Bay is one of the deepest bays in Estonia, max depth is about 100 m.[3]