The ship rolled on the heavy seas.

这艘船在波涛汹涌的海面左摇右摆。

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Heavy seas can cause cancellation of ferry services.

海上起风浪会导致渡轮航班取消。

《牛津词典》

In heavy seas, work on the wind farm is suspended.

在波涛汹涌的大海，风电场的工作被推迟。

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The Kulluk drillship ran aground in heavy seas on Dec. 31 near Kodiak Island.

FORBES: Shell Ships Alaska Drilling Rigs To Asia For Repairs

The tow rope snapped, however, in heavy seas and the fishing boat went aground on rocks.

BBC: Tobermory lifeboat in 11-hour rescue drama

Strong winds and heavy seas battered the east coast in December, causing extensive damage and flooding.

BBC: Container in North Berwick harbour