Hello!
Now that it is summer, let’s enjoy the sun.
Do you want to go to the beach to catch some rays?
I know I do! 'Catch some rays’ means to lay out in the sun tanning.
‘Rays’ refers to rays of sunlight.
【For example】
Mary: What are you doing today?
John: I’m going to the beach to catch some rays.
Mary: Don’t forget sunblock or else you’ll burn.
John: Thanks.
●日本語解説：「日光浴をする」という意味です。