Marco Island, located at the southernmost tip of mainland Florida's West Coast. Known as the "Paradise Coast" is the largest inhabited isle of the "Ten Thousand Islands".Marco Island provides sun-washed beaches, tranquil waters of the Gulf of Mexico, a warm climate year-round, tropical adventures, extraordinary fishing and much more. Welcome to Paradise! Beaches: Marco Island includes four miles of beach, with most island resorts located directly on the beach. Climate: The climate of Marco Island is subtropical with a strong marine influence from the Gulf of Mexico. It is blessed with spectacular sunsets and Gulf sea breezes. Average Annual High 85F (29 C) Average Annual Low 65F (18 C) Peak Season: January through April. Vacation Season: May through December.