1.   On this day, with its strong swells and a stiff afternoon breeze, seagulls just sat on the surface.

2.   Back then, a strong south swell was an almost mystical occurrence to George.

3.   Submerged islands, for example, can disturb an otherwise strong swell.

4.   The swimmer said his severe seasickness had been caused by violent movements of the raft in a strong swell.