INTRODUCTION: EXTREME WAVE ANALYSIS IS A CRUCIAL STEP IN PORT AND OFFSHORE STRUCTURE DESIGN AND PLAYS A LARGE ROLE IN BUDGETING FOR THESE COSTLY PROJECTS. CRITERIA OBTAINED FROM THESE ANALYSES ALSO HAVE IMPORTANT SAFETY IMPLICATIONS FOR THOSE INVOLVED. THIS STUDY DETAILS SUCH AN ANALYSIS PERFORMED FOR WAVES IN THE SOUTHERN PERSIAN GULF, STRAIT OF HORMUZ AND THE OMAN SEA REGIONS. EXTREME SIGNIFICANT WAVE HEIGHTS AND ASSOCIATED EXTREME WAVE PEAK PERIODS FOR VARIOUS RETURN PERIODS OVER A DOMAIN SPANNING FROM 52.625OE TO 59.25OE AND 23.25ON TO 27.75O AT A RESOLUTION OF 0.125O X 0.125O WERE OBTAINED BY CONSIDERING LOCAL STORMS OCCURRING DURING THE PERIOD 1948- 2009 INCLUSIVE, REPRESENTING 60 YEARS WORTH OF DATA. SEVERAL WIND FIELDS WERE CALIBRATED AGAINST ALTIMETRIC AND QUIKSCAT OBSERVATIONS OF WIND SPEED DURING SIGNIFICANT STORM EVENTS FOR THE PERIOD 1992 TO 2008. AFTER CALIBRATION OF THE WAVE MODEL WAVEWATCH III WITH RESPECT TO ALTIMETRIC OBSERVATIONS OF WAVE HEIGHT, SIMULATIONS WERE RUN FOR APPROXIMATELY 360 STORMS SELECTED FROM A LONG-TERM CLIMATIC WAVE DATABASE. THE WAVE OUTPUTS WERE USED TO PERFORM AN EXTREME ANALYSIS USING THE PARETO DISTRIBUTION AND EXTREME SIGNIFICANT WAVE HEIGHTS WERE ESTIMATED FOR RETURN PERIODS OF 1, 5, 10, 20, 50 AND 100 YEARS.