Why can't I swim at night?
Why can't I swim at night? It isn't safe to swim in the ocean at night. Swimming in the ocean at night can pose a greater risk than swimming during daylight hours, especially for inexperienced swimmers. This is due to the loss of vision in the darkness, the lack of people nearby, and the nocturnal behavior of ocean predators.
Is it better to swim at night or in the morning?
The researchers controlled for environmental factors and found that “swim performance across all participants differed significantly by environmental time of day,” with swim times between 2 a.m. and 8 a.m. being significantly worse than those conducted at other times of day. Peak performance was noted at 11 p.m.