Interval type 2 fuzzy logic for significant wave height forecasting

These days, fuzzy logic system has widely been applied in many applications, including wave forecasting. In current fuzzy logic development, researchers have started to use interval type 2 fuzzy as a solution to solve the uncertainties problem. The aim of this research is to propose a method to forecast significant wave height by using interval type 2 fuzzy logic. As part of the research, this paper focuses on two objectives; to extend type-1 fuzzy to type-2 fuzzy by assigning uncertainty to its type 1 counterpart and to predict significant wave height for 1 hour, 3 hours, 6 hours, 12 hours and 24 hours lead time. The root mean square error (RMSE) has been used to score the performance of both type 1 and type 2 fuzzy methods. The best result has shown at 6 hours lead time with RMSE of 0.1529.