Capris for Smart Casual Night?

Would it be appropriate to wear capris with a nice top/blouse for smart casual nights on RCL Jewel of the Seas during a Caribbean trip?

Depends on the capris.......some are "smart casual", some are "dressy", and some are "sloppy casual".

Yes..80% of women will be in capris.

Would it be appropriate to wear capris with a nice top/blouse for smart casual nights on RCL Jewel of the Seas during a Caribbean trip?

Absolutely...you could even wear them on formal nights too if you choose...Easy to dress this type of pants up or down whatever the occasion.

Your outfit will be just fine.