Although the physiological health benefits of physical activity and exercise are well documented, the psychological benefits are less defined. The current study examined the effect a single 30-minute bout of surfing had upon exercise-induced affect in adults. Affect is defined as the positive or negative feelings created by a specific stimulus. One hundred and seven participants (91 males and 16 females) between the ages of 18-58 ( M = 28.14, SD = 8.27) completed the Physical Activity Affect Scale (PAAS) prior to and immediately following a single 30-minute surf session. A series of dependent t-tests were used to examine differences between pre and posttest affect. The results indicated that affect was significantly altered by exercising (surfing), with significant improvements in positive affect and tranquility, as well as significant reductions in negative affect and fatigue. Implications for the continued investigation of the effects of surfing are discussed.