Avacha Bay is a Pacific Ocean bay on the southeastern coast of the Kamchatka Peninsula. It is 24 km long and 3 km wide, with a maximum depth of 26 m. The Avacha River flows into the bay. The port city of Petropavlovsk-Kamchatsky and the closed town of Vilyuchinsk lie on the coast of the bay. It is the main transport gateway to the Kamchatka r…Avacha Bay is a Pacific Ocean bay on the southeastern coast of the Kamchatka Peninsula. It is 24 km long and 3 km wide, with a maximum depth of 26 m. The Avacha River flows into the bay. The port city of Petropavlovsk-Kamchatsky and the closed town of Vilyuchinsk lie on the coast of the bay. It is the main transport gateway to the Kamchatka region. The bay freezes in the winter.