The tragedies, the deadliest so far reported in the Aegean in 2016, come as the EU seeks to push Turkey to halt the flow of migrants across its borders in exchange for financial help.
A spokesman for the Turkish coastguard told AFP that the bodies of 36 migrants had been found, including 29 recovered by the Turkish gendarmerie and seven by the coastguard.
Two dozen migrants seeking to reach the Greek island of Lesbos set out before dawn aboard a rubber boat but it capsized in bad weather and high seas, the Dogan reported.
The bodies were found either washed up on the beach near the resort of Ayvalik or in the sea nearby, Dogan said. Eight more migrants had been rescued.
Among those found dead was a woman who was six months pregnant, Dogan said.
Video footage showed Turkish security forces lifting other bodies from the waves in the shallows on the shore.
The deaths are the latest involving migrants fleeing war and misery in the hope of finding a new life in Europe.
The images of the small lifeless bodies on the sand echo those of three-year-old Syrian refugee Aylan Kurdi, pictures of whose corpse lying face-down on a Turkish beach in September 2015 spurred Europe into greater action on the migrant crisis.
Turkey, which is home to some 2.2 million refugees from Syria's civil war, has become a hub for migrants seeking to reach Europe, many of whom pay people smugglers thousands of dollars for the risky crossing.
The International Organization for Migration (IOM) said 1,004,356 migrants and refugees reached Europe in 2015, almost five times the previous year's total of 219,000.
