Mesia Ammoudia in Itanos is a quiet beach located on the northern part of Vai and south of Erimoupoli Beach.
It is accessible by car, you can park in Erimoupoli and take a short walk to reach the three small coves with turquoise waters and sandy beaches.
Park here: https://maps.app.goo.gl/poFyzdyAUekhBxbn7
The beach lacks facilities, so it's best to bring your own supplies for a relaxing day by the clear waters.
Nearby, you can explore the ancient Minoan settlement of Itanos and the wetland area formed during the winter months above the beach.