Operating in extreme temperature weather conditions both hot and cold. Eye strain from sea spray or glare from the sun. Movement of the boat requiring extra effort to hold on or maintain balance, even movement of the boat when you are in a seat with side rests can be very tiring if the motion is large enough. Stress.

Feeling exhausted after a day on the water is a biological phenomenon often called "boating fatigue." Your body is constantly working behind the scenes to maintain balance against the boat’s motion, a process known as sensory integration where your brain must reconcile the movement your inner ear feels with what your eyes see. This continuous muscular micro-adjustment burns significant energy. Environmental factors like constant exposure to sun, wind, and the glare of the water further tax the system, often leading to mild dehydration and "sunburn fatigue." Additionally, the loud noise and vibration from the engine can cause sensory overload, which the brain processes as tiredness. To mitigate this, boaters are encouraged to stay hydrated, wear polarized sunglasses to reduce eye strain, and take frequent breaks in shaded areas to allow the nervous system a chance to reset from the constant stimulation of the marine environment.