I visited O’ahu for a 4 nights in December 2023.

Hawaiian Monk Seal (Neomonachus schauinslandi)

Ka’ena Point State Park

This seems like the most reliable spot on O’ahu to see Hawaiian Monk Seals. And I saw three when I visited in 2023.


Rough-toothed Dolphin (Steno bredanensis)


A six hour boat trip in December 2023 produced my target Rough-toothed Dolphins plus Pantropical Spotted Dolphins.Other nice species that are common or occasional in these waters include Blainville’s Beaked Whales and Pygmy Killer Whales.

Community Reports

O’ahu, 2023: Jon Hall, 4 nights and 3 species including Rough-toothed Dolphins and Hawaiian Monk Seals.

O’ahu, 2023: Willian Henri Lewis, 4 nights and 3 species including Rough-toothed Dolphins (on the same boat trip as Jon Hall above) and Hawaiian Monk Seals.

O’ahu, 2023: Sierra Foley & Teddy Relan, 5 days & 4 species including Hawaiian Monk Seal and Spinner Dolphins.

Kauai, 2020: Justin Brown, and useful information on seeing Hawaiian Monk Seals.

Kauai, 2019: Cheryl Antonucci’s report of multiple  Monk Seals and some Spinner Dolphins.

Maui, 2015: Vladimir Dinets’s notes on various mammals occasionally seen on Maui (which is a bit of a mammalian desert it seems).

Hawaiian Monk Seals, 2014: Dominque Brugiere’s account of 11 days looking for Monk Seals (and see comments here about other locations).

Also See

Monk Seal on Poipu Beach, Kauai  (July, 2021).

Hoary Bats on Big Island, June 2018.

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