Generally, adults who are healthy can tolerate water temperatures down to 68 degree Fahrenheit for short periods of time.
However, some people might find swimming in water this cold uncomfortable, especially those who are not used to swimming in cool water or who have health conditions that affect their circulation or respiratory function.
Here are some factors to consider when deciding whether or not to swim in 68 degree ocean water:
Age: Children and the elderly are more sensitive to cold water and may be at greater risk of discomfort or hypothermia.
Health: People with heart disease, diabetes, or other chronic conditions should talk to their doctor before swimming in cold water.
Acclimatization: People who are not used to swimming in cold water should start gradually and increase their exposure time slowly over several sessions.
Clothing: Wearing a wetsuit or other protective gear can help to insulate the body and reduce heat loss.
Safety: Swim in designated areas that supervised by a lifeguard, especially if you are not a strong swimmer.
If you experience any discomfort, such as shivering, numbness, or slurred speech, get out of the water immediately and warm up.
It's always a good idea to listen to your body and be cautious when swimming in cold water, especially if you are not used to it.