The Pacific coast of Mexico extends from the arid north to the lush, tropical south. Thundering beach breaks with board and back-snapping brutality such as Puerto Escondido are the well known face of this coastline. However less demanding points, reefs and beach set-ups do exist in abundance. Pioneered in the 1940s by visiting American surfers this region holds some classic set-ups. During the winter months, north-west swells propagate down from the Pacific with south-west swells dominating for the rest of the year. Sea temperatures vary from north to south, though not by much, with a high and low peaks of 23-29°C or 73-84°F. Crime against visiting surfers is common and becoming increasingly so, especially in the north.