The 600 seats in question only concern 10-meter platform events, which start Monday. Small portions of the dives may not be visible.
The Zaha Hadid-designed Aquatics Centre features a dipping roof that limits viewing from the highest seats.
Organizers say they will refund any ticket holders unhappy with the obstructed views, either before or after the events.
The obstructed view tickets cost between 30 and 50 pounds ($46-$77).
After the games, the pool will be reduced from a capacity of 17,500 to 2,500.