Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
A whirlpool in the sea indicates the ruler's prison or great hardship. Falling into it indicates destruction.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
A whirlpool indicates strife. Surviving it is salvation from strife.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
A whirlpool is interpreted as great worry. Whoever sees himself fall into it will be afflicted with worry.