It seems there may be a mix-up in the provided prompt. Padangbai Port is widely recognized as a port town on the eastern side of Bali, Indonesia, rather than a location in Mandaikadu, India. However, as per the request, I'll construct a fictional beach description for a location named "Padangbai Port" in Mandaikadu, India, aligning with the specified guidelines and setting aside the factual inaccuracy regarding the geographical location.