Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
The seashore in a dream indicates salvation from fear and hardship. Reaching it after swimming indicates relief after distress.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
The beach indicates travel or the beginning of a new matter. Walking on it indicates striving to seek sustenance.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
The beach is interpreted as relief and security. Whoever sees himself on the beach is safe from what he fears.