Edhellond was an ancient harbour in southern Gondor. It had been established south-west of where the Ringló entered the Morthond, near where the combined waters flowed into Cobas Haven.
Maps
Edhellond was founded in the late First Age by seafaring Sindar from the west havens of Beleriand who fled in three small ships when the power of Morgoth overwhelmed the Eldar and the Edain; but it was later increased by adventurers of the Silvan Elves seeking for the sea who came down Anduin.
During his sea voyage of S.A. 735-9 to the coasts of Middle-earth, Aldarion, the grandson of King Tar-Elendil of Númenor, looked at the "country of Amroth where the Nandor Elves still dwell" which included Edhellond.
From Edhellond, Elves began sailing westward from the time of the fall of Eregion in S.A. 1697.
Around T.A. 1980, with the freeing of the Balrog in Moria, many of the Galadhrim fled south to Edhellond and sailed over the Sea to Valinor. Amroth, King of Lórien, was lost at sea near Edhellond in 1981 when he attempted to swim to shore to seek his beloved Nimrodel. The ship from which he jumped overboard was the last ship of Elves to leave from Edhellond. The haven was deserted from then on, although it was remembered, as were other ancient Elvish dwellings, in the traditions of the Gondorians in Anfalas and Dol Amroth.