The modern fully furnished room facing ocean (Mae Ram Phung Beach) will chill out your day off. High floor is not only giving you the view but the wind would relax you as much as the waves sound pass into your comfort room.
Rayong province has lots of nature reserves to explore. It's just about 3 hours drive from Bangkok. Mea Ram Phueng beach is quiet and clean, but still convenient to find many good seafood restaurants and cafes.