Be aware of your physical fitness when scuba diving. While there's nothing stopping you from diving when you're overweight, do scuba diving properly by diving within your set BMI range.

Is There a Weight Limit for Scuba Diving?

A BMI of 25 and over categorizes a person as overweight. In this context, there’s no certain weight limit put on a diver by rule, however, you have to be medically checked for fitness (stamina, fat level) before you can be allowed to scuba dive.

How Does Being Overweight Affect a Person’s Diving Skills and Experience?

Scuba diving requires you to lift heavy equipment from time to time as well as perform various strenuous activities, for which your stamina and health need to be perfect. If you’re fat and not used to strenuous physical activities such as lifting weights, exercising and swimming, scuba will prove to be more of an exhausting activity than a fun one.

Being obese is also associated with a lot of other health problems, for example diabetes, cardiovascular diseases, hypertension (high blood pressure), and lack of stamina. All these are likely to cause you inconveniences when underwater, possibly ruining your whole experience for the very first time.