Baie de la Dauphine is a natural harbour located on the Loranchet Peninsula, at the north-west of the island of Grande Terre in the Kerguelen Islands.
The bay is located North of the Kerguelen, and opens towards the East, between the cape of the Kergelen Arch which limits its Northern extension and distinguishes it from Baie de l'Oiseau, and Discovery Presque-isle.
Lieutenant Kerguelen sighted the site during his first voyage in February 1772, without landing.
In his second voyage, he arrived at the island in December 1773, and entered Baie de l'Oiseau in January 1774.
The site has also been called "Bay of the Portal", in reference to the Kerguelen Arch, on some older military maps.