Wiktionary
southeasternmost
a. Farthest southeast.
Usage examples of "southeasternmost".
Cape Martin, the southeasternmost point of Nuku-hiva, was abeam, and Comptroller Bay was opening up as we fled past its wide entrance, where Sail Rock, for all the world like the spritsail of a Columbia River salmon-boat, was making brave weather of it in the smashing southeast swell.
With the moon and stars there was enough light for us to discern the cluster of cottages when we finally came upon the cleft that hid the southeasternmost one of the Back Three.