Yes of course, surfing is avilable in Montelimar area and the places Melon, Masa Chapa, Pochomil and Pochomil Viejo are perfect for your surfing adventures. Climate takes the main part in
Nicaragua surfing, because Nicaragua has an average temperature of 27°C (80°F) year round. Rain is limited and the pleasant time to visit Nicaragua is between June and January, so better plan your trip during this time and enjoy the surfing.
Nicaragua has wide range of quality surf spots and
Riva is rich with surf. so if you get time just visit Riva as well. Good luck!