Ocean Blog

WATCH: Kaua‘i charter boat spies its first humpback whale of 2025-26 season

The whale was spotted the morning of Oct. 14 in waters off the west side of Kaua‘i, but it was not the earliest sighting of the majestic cetaceans this year in the islands — that was in September.

Minor coastal flooding forecast along shores of all islands of state during high tides

Peak monthly tides will combine with higher-than-predicted water levels to produce conditions ripe for inundation of shorelines and low-lying coastal areas during early morning hours through afternoon of Oct. 10.

University of Hawaiʻi professor recognizes deep-sea Chewbacca-like coral species

First sighted near Molokaʻi and then the Mariana Trench 10 years later, Iridogorgia chewbacca highlights the collaborative efforts needed to reveal hidden oceanic wonders.

3D-printed ceramic structures provide crucial protection for baby corals

University of Hawaiʻi offer a groundbreaking, low-cost solution to boost reef recovery worldwide and significantly increasing coral survival rates in real reef environments.

Top 10 things to do on Big Island for Sept. 5-11: Queen Liliʻuokalani Festival, Big Island Walk & Roll to Cure ALS, World Manta Day Festival and more

Hey, Big Island. Looking for something to do this weekend? We once again have you covered. Check out our top 10 things to do on the Big Island now!

Isaac Kepoʻokalani Hale Beach Park in Puna to be temporarily closed starting next week

Closure is necessary to support public safety efforts during crane dredging operations at Pohoiki Boat Ramp, which is located at the park.

Hōkūleʻa and Hikianalia make stop in Cook Islands

Both Polynesian Voyaging Society traditional double-hulled voyaging canoes were welcomed by the Rarotonga community with a traditional ceremony, following a 2-day trek from Bora Bora, French Polynesia under nearly perfect weather conditions.

High surf advisory remains in effect for south-facing shores

Waves of 10 to 14 feet are forecast this morning, decreasing to 8 to 12 feet this afternoon and 7 to 10 feet Monday for those shorelines in Puna, Kaʻū, North and South Kona and North and South Kohala. Flooding of beaches that are normally dry, minor coastal erosion and saltwater inundation also will be an issue with continued coastal flooding.

High surf advisory in effect this weekend for south-facing shores of Big Island

Large breaking waves of 7 to 10 feet are forecast by Aug. 8 along the southern shores of the island, with wave heights increasing to between at least 10 and 14 feet by Aug. 9.

UPDATE: Coastal flooding now likely through late Sunday night along Big Island shorelines

The extension comes as National Weather Service forecasters also issued a high surf advisory for south-facing shores of the state that will be in effect from early Friday morning to early the morning of Aug. 11.

Waters at Māhukona Landing in North Hawai‘i being retested after high level of bacteria discovered

Hawai‘i Department of Health issued a high bacteria notification for the area after higher than normal bacteria level of 178 per 100 mL was found during recent routine monitoring. There is no known source of fecal contamination.

UPDATE: Wind advisory again extended for North Hawai’i, parts of Kaʻū and Puna

The advisory is now in effect until 6 p.m. today for North and South Kohala as well as northern and interior portions of North Kona and Hāmākua along with south and southeasten portions of Kaʻū and Puna, with sustained winds of 20 to 30 mph expected and gusts up to 50 mph.

Volcano Watch: Distant vs. local earthquakes and tsunami response times in Hawai‘i

Tsunami waves generated by distant earthquakes take hours to reach the Hawaiian Islands, giving people time to evacuate vulnerable areas. Local tsunami, however, do not need to travel far to reach our shores, leaving a much shorter time to respond.

UPDATE: Tsunami advisory is canceled, County of Hawaiʻi to open beach parks, all roads

Hawai‘i County officials ask residents, however, to exercise caution and stay out of the water, as coastal areas continue to be hazardous.

US Coast Guard, international partners take on illegal fishers in Western and Central Pacific

Annual 3-month Operation Nasse — conducted by United States, Australia, France and New Zealand, Fiji, Solomon Islands, Tonga and Vanuatu — aimed at safeguarding marine resources of Pacific Island nations.

Hōkūleʻa and Hikianalia return to Papeʻetē to rest, replenish and ready

Traditional double-hulled voyaging canoes have been back in Tahitian capital since July 14 preparing for the next leg of their Moananuiākea Voyage; stop also allowed for crew rotation before continuing their epic circumnavigation of the Pacific Ocean.

Tsunami watch issued for Hawai‘i, canceled less than an hour later after large quake off Russian coast

The July 19 temblor that caused the tsunami watch excitement struck roughly 45 miles northeast from the epicenter of a 1952 magnitude-9 earthquake that did trigger a destructive Pacific tsunami that caused damage in Hawai‘i, including on the Big Island.

36th annual Richardson Roughwater Swim set for end of August in Hilo

This 1-mile swim hosted by Hawai‘i County Department of Parks and Recreation at Richardson Ocean Park is designed for strong swimmers with strong swimming skills who can handle the sometimes rough course conditions, including currents and waves.

Best case scenario: Coral will be impacted by projected unprecedented acidification of waters around main Hawaiian islands

New study from researchers at University of Hawai‘i at Mānoa School of Ocean and Earth Science and Technology also provides hope that that impact could be manageable; meanwhile, five Indo-Pacific coral species received critical habitat protections this week, potentially preventing their mass extinction.

Hōkūleʻa, Hikianalia deepen cultural ties, spark ocean protection dialogue

Voyaging canoes arrive in Moʻorea for cultural engagements prior to departing July 13 for brief return to Papeʻetē, Tahiti, before sailing for their next port of call: Tautira.
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