The Niagara 31 is a Canadian sailboat that was designed by German Frersas a racer-cruiser and first built in 1977.

The Niagara 31 is a recreational keelboat, built predominantly of fiberglass with balsa cores in the deck and hull. It has teak wood trim. It has a masthead sloop rig, a raked stem, a raised transom, an internally mounted spade-type rudder controlled by a wheel and a fixed fin keel. It displaces 8,000 lb (3,629 kg) and carries 3,550 lb (1,610 kg) of ballast.

The boat has a draft of 5.00 ft (1.52 m) with the standard keel fitted.

The boats up to serial number 50 were factory-equipped with a Swedish Volvo diesel engine of 13hp (10kW) with a saildrive.

The galley is located at the starboard side, at the bottom of the companionway stairs and includes a two-burner propane stove. The icebox is located on the port side, in the aft section of the navigation station. The navigation station seat and table both stow out of the way when not in use. The head is located forward, just aft of the bow “V”-berth and is separated from the main and forward cabins by folding doors. Additional sleeping accommodation includes two main cabin settee berths, the port one a double berth. The interior is predominantly teak with varnished pine trim.[3]

Ventilation is provided by two translucent hatches, one in the forward cabin and one in the main cabin. All six ports were replaced in 2013 and all are now opening ports, which provides even greater ventilation.

The current owner has owned the boat since 1986. It is reported that sections of the deck were replaced at Wiggers in 2013 and the entire deck was refinished in the process. The cockpit sole has been rebuilt and reinforced where the rudder post passes through.

Sail complement includes: fully battened North main, #2 Evolution racing sail with Harken furling, an older North dacron #3, and a lightly used spinnaker.

Hull #39, built in 1981. Two owners – one owner from 1981 to 1986 and current owner.

Survey from 2021 available to qualified purchasers.