Abstract: A boat drain plug with cable tether including a cylindrical plug portion adapted for coupling with the drain of the boat. The cylindrical plug portion has an upper end, a lower end, and a cylindrical side wall therebetween. The upper end has a block secured thereto. The block has an aperture therethrough. The lower end is receivable within the drain. A length of safety cable is provided that is formed into a lower loop and an upper loop. The lower loop is coupled with the aperture of the block of the plug portion. A swivel loop is provided having a central pivot member with opposed upper and lower looping members. The lower looping member couples with the upper loop of the length of safety cable. A safety line is provided having an upper end and a lower end. The lower end couples with the upper looping member of the swivel loop. The upper end is couplable with the tie down cleat of the boat.