When going to the seaside, the temperature is 22-28 degrees, which is suitable for swimming. The time when the ultraviolet rays of sunlight are strongest (will cause the greatest harm) is between 10 morning and 3 pm. It is best to choose swimming time after 4 pm. Especially people who often work indoors are less exposed to the sun and are more likely to get sunburned.

But try not to swim after 10 at night, or you will lose sleep because of excessive nerve excitement.

Extended data

Precautions for going to sea

1. When you get to the seaside, you should observe first. Remember, you should pay attention to the warning line or warning sign by the sea. Don't cross the warning line, and don't go to the dangerous area mentioned by the warning sign.

2. Make sure there must be lifesavers on duty at the seaside, and then go to the seaside to play. If there is no lifeguard, don't go into the water easily to avoid accidents.

3. People who can't swim will be hung by inflatable objects, which is desirable, but there will also be accidents, that is, what to do if the inflatable ring or swimming ring leaks. Therefore, it is suggested that people who can't swim, even if they use swimming rings to play in the sea, also need people who can swim to follow.

If you are swimming in the sea and suddenly bleed, such as what happened to your feet and limbs, don't stay in the water, but go ashore at once. This is to prevent bloodthirsty creatures in the sea from attacking you.

When playing in the sea, if you find someone drowning and can't swim, don't try to save people, but immediately call out for help. Especially ask a lifeguard or someone who can swim for help.