Simplify the following text for a Grade 5 native English-speaking person.
Original: The size of waves varies throughout the year , but large swells in fall and winter can reach heights of up to 50 feet ( 15 metres ) . It is widely considered one of the best beaches for surfing worldwide .
Simplified: Large swells in fall and winter can reach heights of up to 15 m. It is widely considered one of the best beaches for surfing worldwide .