Is it permissible to practice the sport of surfing during the month of Ramadan, whether professionally, involving training and travel, or as a regular daily hobby?

A fasting person must protect their fast from invalidation, and they are not permitted to do anything that would invalidate it. If it is highly probable that water will enter the stomach when surfing, then it is not permissible to practice it while fasting. Whoever does so and swallows water, their fast is invalidated, and they must make up the day and repent. However, if there is assurance that water will not enter, then there is no harm in practicing it, similar to the ruling on swimming and bathing for a fasting person, provided that one is careful to avoid uncovering awrah, neglecting obligatory duties, or being lenient in looking at forbidden things. A fasting person should also be keen on performing acts of obedience, as excessive engagement in permissible activities may lead to heedlessness.