Lake Onega is relatively cold, with temperatures below for half of the year and average summer temperatures of about . The catchment area of drains into the lake via 58 rivers and more than 110 tributaries, including the Shuya, Suna, Vodla, Vytegra and Andoma. The only outgoing River Svir, which marks the southern boundary of Karelia, runs from the southwestern shore of Lake Onega to Lake Ladoga and continues as the Neva River to the Gulf of Finland. The White Sea–Baltic Canal runs through the lake from the White Sea to the Baltic Sea. The Volga–Baltic Waterway connects Onega Lake with the
Port Tampa Bay which has exclusive truck lanes to route truck traffic from Interstate 4 directly to Port Tampa Bay, which now allows trucks to bypass city roads and travel directly between the Port and the interstate system. Tampa Bay has been used as a wide, safe harbor ever since it was first mapped by Spanish explorers in the 16th century. Álvar Núñez Cabeza de Vaca referred to the entire bay as a "Port," writing, "The Port of which we speak is the best in the world." In 1821, two years after the United States bought Florida from Spain, James Forbes, Military Governor