When is the temperature suitable for swimming in the sea and not cold?

When the temperature is **27 -33 degrees * *, it is more suitable for swimming in the sea and won't feel cold. However, when the temperature is below 27 degrees, especially when swimming in the sea, you will feel cold. And the temperature is higher than 33 degrees, especially when the sun is in direct sunlight, it is easy to get heatstroke and drown. Therefore, when choosing the time and place for swimming in the sea, we need to pay attention to the temperature and the temperature of the sea to ensure that the body can adapt and avoid accidents.