What's the climate like in Beidaihe in May?

The weather is warmer in May, but you can't go into the sea yet, because the sea is still cold. If you want to play with water, you can catch some small crabs or something. I come from Beidaihe, where I grew up. Just put on a shirt and a thick coat. Be careful not to catch a cold because of the big temperature difference between morning and evening, but if you go, you must try Pippi shrimp, because May is the fattest! And Huang Er! Hey hey!