You can expect most pontoon boat weights to be around 2,500 pounds (1,134 kg). Most pontoon boat trailers weigh about 1,200 pounds (544 kg).The average boat weight with trailer is approximately 3,700 pounds (1,678 kg).Fuel also weighs about 6.3 pounds (2.9 kg) per gallon of gas. It’s recommended to add the weight of a full tank to …