Most people spend just a few days or a weekend on the Pacific coast , though there’s plenty to see and do to fill a week or more.
For a quick beach break, Puerto Arista  and Boca del Cielo  are logical choices. Costa Azul  is another possibility—more isolated and scenic, but lacking lodging on the beach; unless you’re camping, the nearest bed is in Pijijiapán .
With more time, consider basing yourself in Tapachula  for two to three days; one day to explore the city itself, including the archaeological museum  and excellent restaurants , and another day or two to visit nearby sights like the Maya ruins of Izapa  and the beach at Barra de Cahoacán .
From Tapachula, several overnight trips are possible, including to Barra de Zacapulco , where you can take a boat tour through the impressive mangrove forests and enjoy the wide clean beach, or to La Ruta del Café , where you could spend up to three days touring various working coffee fincas.
Climbing Tacaná Volcano  is a goal for many who come to this area; it’s typically a three-day outing, starting from the small town of Union Juárez.