Cuba is an archipelago of islands located in the northern Caribbean Sea at the confluence with the Gulf of Mexico and the Atlantic Ocean. It lies between latitudes 19° and 24°N, and longitudes 74° and 85°W. The United States lies 150 kilometers (93 miles) across the Straits of Florida to the north and northwest (to the closest tip of Key West, Florida), and the Bahamas 21 km (13 mi) to the north. Mexico lies 210 kilometers (130 miles) across the Yucatán Channel to the west (to the closest tip of Cabo Catoche in the State of Quintana Roo).
Haiti is 77 km (48 mi) to the east, Jamaica (140 km/87 mi) and the Cayman Islands to the south. Cuba is the principal island, surrounded by four smaller groups of islands: the Colorados Archipelago on the northwestern coast, the Sabana-Camagüey Archipelago on the north-central Atlantic coast, the Jardines de la Reina on the south-central coast and the Canarreos Archipelago on the southwestern coast.
The main island, named Cuba, is 1,250 km (780 mi) long, constituting most of the nation's land area (104,556 km2 (40,369 sq mi)) and is the largest island in the Caribbean and 17th-largest island in the world by land area. The main island consists mostly of flat to rolling plains apart from the Sierra Maestra mountains in the southeast, whose highest point is Pico Turquino (1,974 m (6,476 ft)).
The second-largest island is Isla de la Juventud (Isle of Youth) in the Canarreos archipelago, with an area of 2,200 km2 (849 sq mi). Cuba has an official area (land area) of 109,884 km2 (42,426 sq mi). Its area is 110,860 km2 (42,803 sq mi) including coastal and territorial waters.
With the entire island south of the Tropic of Cancer, the local climate is tropical, moderated by northeasterly trade winds that blow year-round. The temperature is also shaped by the Caribbean current, which brings in warm water from the equator. This makes the climate of Cuba warmer than that of Hong Kong, which is at around the same latitude as Cuba but has a subtropical rather than a tropical climate. In general (with local variations), there is a drier season from November to April, and a rainier season from May to October. The average temperature is 21 °C (69.8 °F) in January and 27 °C (80.6 °F) in July. The warm temperatures of the Caribbean Sea and the fact that Cuba sits across the entrance to the Gulf of Mexico combine to make the country prone to frequent hurricanes. These are most common in September and October.