What to do when you are on a seaside holiday and the weather is horrible?

A great thing to do is to visit museums.
Absolutely! However, there might be holiday resorts without museums.
In that case, you can always stay at the hotel or cook a nice meal in your apartment.
Sure! Talking of hotels, they usually offer great facilities, like wellness, sports facilities, things like these.
Yes!
Or you can just visit all the local restaurants, bars and cafes, taste the local dishes, you can easily spend a whole day.
That may be true, but if you have small children, this wouldn't work, I'm afraid.
Yes, I haven't thought of that. Then how about getting on the train or local bus and exploit a nearby place?
Hmm, I don't know, when I'm on holiday I don't really feel like travelling.
I see your point. Well, just snuggling up with a good book for a rainy day is also a relaxing thing to do.
I concur.