On Lesvos, one can find incredible beaches, many of which have been awarded a blue flag. You can enjoy tranquillity and isolation on beaches such as Gavathas and Chrousos, or you can combine your visit to the beach with water sports in the better organised beaches of Eressos and Vatera. The beach of Agios Isidoros with its gorgeous crystal clear waters, at Plomari, is also a very popular destination. Other beautiful beaches worth visiting are: 

East coast: Mitilini peninsula

Τsamakia; cosmopolitan and very organized beach at the heart of the town, under the castle.
Κanoni; cosmopolitan beach atn Thermi, 10Km north of the town.
Pamphila and Panayiuda; beautiful settlements north of the town, with many small and quiet beach around them.
Κantines; mildly organized beaches next to airport, 9Km south of the town.
Haramida; organized sandy beach, 13Km south of the town.
Αyios Ermogenis; picturesque, green bay, next to Haramida.

Northeast coast

Skala Mistegnon; mildly touristically developed fishing village, 16Km from the town.
Skala Neon Kidonion; picturesque fishing village, with a nice beach and many fish-taverns, 19Km from the town.
Τsonia; beautiful red sandy beach at the NE end of the island, 12Km from Mantamados.

South coast

Vatera; huge (9Km) and very popularsandy beach, 30Km west from Plomari.
Drota;scenic pebble beach,20Km west from Plomari.
Μelinda; picturesque and popular sandy beach, 6Km west from Plomari.
Αyios Isidoros; cosmopolitan, organized sandy beach, next to Plomari.
Τarti;famous picturesque resort,18Km east from Plomari. Next to it there are many quiet, scenic bays: Ligonari, Τsilia and Phara.

West coast

Skala of Eressos; organized and populara sandy beach, with many amenities and services.
Τavari; a beautiful small fishing village, 15Km east from Eressos.
Sigri; near the picturesque fishing village there are many remote and very scenic beaches. This of Phaneromeni, north of the village, is somehow organized and popular.
Αntissa; at the north of Antissa there are the quiet beach the picturesque Gavathas and the remote beaches Lapsarna, Κambos and Paleokastro (ΑncientΑntissa). Windy places of wild beauty.

North coast

Petra; one of the main resorts of Lesvos, well organized, with many services and amenities.
Αnaksos; fine sandy beach next to Petra.
Μolivos; top destination of the island of Lesvos; world famed for its quaint beauty and with an excellent sandy beach.
Αyii Anargiri; a series of fine sandy beaches, next to the romantic thermal resort of Eftalu, near Molivos.

Source: North Aegean Region - https://www.pvaigaiou.gov.gr