Fleet Numerical Weather Central (FNWC) wave period and height analyses for a selected grid point were verified by comparison with wave conditions recorded by a coastal wave sensor at San Clemente Island, California. Forty-six per cent of the FNWC wave heights were within plus or minus 1 foot of the recorded heights, 75% were within plus or minus 2 feet, and 91% were within plus or minus 4 feet. The FNWC heights were found to be over-six per cent of the FNWC periods were within plus or minus 1 second of the recorded periods, 45% were within plus or minus 2 seconds, 66% were within plus or minus 4 seconds, and 90% were within plus or minus 6 seconds. There was no tendency for FNWC to over or underpredict swell periods, but wind-wave periods were under predicted on the average by five seconds. (Author).