Source: The Great Interpretation of Dreams (Ibn Sirin)
Visiting the Prophet's grave (PBUH) in a dream indicates following his Sunnah, gaining his intercession, and relief from worries.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
Visiting the Prophet's grave indicates the fulfillment of needs and salvation from hardships.
Source: Signs in the Science of Expressions (Ibn Shaheen)
Visiting the Prophet's grave is interpreted as great goodness and blessing.