A honeydew melon is ripe if it has a strong sweet smell at room temperature. Another way to determine if the melon ripe is by shaking the honeydew and listening for a rattling sound. If a rattling sound exists, then this indicates that the seeds have fallen loose inside.
Melons do not ripen after they have been picked. A ripe honeydew melon will not have green veins, which is a good visual sign of immaturity.
Melons can also become overly ripe, which can cause them to rot. Melons can stay safe for up to two weeks in the refrigerator if they are kept at a temperature ranging from 40 to 50 degrees Fahrenheit.