Hawaii in January: Weather, Whales, and What to Expect

January is one of the most popular months to visit Hawaii. The holiday rush has just ended, humpback whales have arrived in force, and the weather is warm and pleasant even if it is slightly wetter than summer. Expect higher prices and fuller resorts than the fall shoulder season, but also one of the most dramatic wildlife experiences Hawaii offers.

Weather in January

Hawaii does not have a cold winter. Daytime highs across the main islands average 78-82°F (25-28°C) in January, with overnight lows around 65-70°F (18-21°C). The ocean temperature is around 74°F (23°C), comfortable for swimming and snorkeling though noticeably cooler than the 79-80°F peak in summer. Trade winds are consistent and keep humidity manageable even on warmer days.

January is one of Hawaii's rainier months, but rain in Hawaii is localized and brief rather than all-day storms. Windward (northeast-facing) coasts receive more rain; leeward (southwest-facing) coasts stay drier and sunnier. On Maui, the Kīhei and Wailea area on the southwest coast typically has far more sun than the wet Hāna coast. On Oʻahu, Waikīkī and the leeward coast are drier than the windward side around Kailua. On the Big Island, Kona stays reliably sunny while Hilo sees frequent rain. Plan your base location and daily activities with these patterns in mind if dry weather matters to you.

North swells make the North Shore of Oʻahu extremely active in January, with waves reaching 20-30 feet at surf breaks like Pipeline, Sunset Beach, and Waimea Bay. This is world-class surfing to watch from the beach, but the water is dangerous and not suitable for casual swimming. The same north swells affect Maui's north shore and Kauaʻi's north shore, making summer swimming beaches like Hanalei Bay on Kauaʻi off-limits in winter. The Eddie Aikau big wave invitational at Waimea Bay is held in January or February when wave heights exceed 40 feet - it does not run every year, and announcements come with little advance notice when conditions align.

Crowds and prices

January starts with the post-New Year surge: the first week of the month remains peak pricing as holiday travelers extend their trips. After the first week, visitor numbers drop slightly but remain elevated compared to fall shoulder season. Martin Luther King Jr. Day weekend (third Monday of January) brings another spike in mainland visitors, particularly families taking advantage of the three-day weekend. Hotels on Maui and at Waikīkī fill quickly for MLK weekend, often at prices comparable to the December holidays.

Mid- to late-January, between MLK weekend and early February, is one of the better windows for slightly lower prices while whale season is in full swing. This is the time to target if you have flexibility. Hotels, rental cars, and flights book out further in advance in January than in shoulder season, so plan at least 2-3 months ahead, and further ahead for MLK weekend or the first week of January.

Whale watching season

Humpback whales migrate from their Alaskan feeding grounds to Hawaii's warm shallow waters to breed and give birth, arriving roughly November through May with peak numbers in January through March. January is when whale activity becomes unmistakable: breaches, tail slaps, pec slaps, and blows are visible from coastal lookouts, and the underwater song of male humpbacks can be heard by snorkelers and divers in the right locations.

The Hawaiian Islands Humpback Whale National Marine Sanctuary protects the primary gathering waters between Maui, Lānaʻi, and Molokaʻi. The Auau Channel between Maui and Lānaʻi is the densest concentration point. You can often spot whales from shore at McGregor Point on Maui (between Māʻalaea and Lahaina) or from the cliffs at Papawai Point. Boat tours departing from Māʻalaea Harbor offer closer access with naturalist guides. Tours fill quickly in January; book at least 1-2 weeks ahead.

Federal law requires maintaining a 100-yard distance from humpback whales for boats and a 10-foot distance for swimmers and snorkelers (though approaching whales underwater is prohibited - the distance requirement applies if a whale approaches you). Violations carry significant fines. Responsible tour operators follow these rules strictly. See our full whale watching guide for detailed coverage of what to expect, which tours to book, and how to maximize your chances of memorable encounters.

What to do in January

Whale watching tours are the signature January activity, and they should be at the top of your list if you have never experienced it. Beyond whales: surfing spectating on Oʻahu's North Shore (the Vans Triple Crown continues into January with the Billabong Pipe Masters typically held in the first half of the month), snorkeling on leeward coasts where water clarity remains excellent despite slightly cooler temperatures, visiting Hawaiʻi Volcanoes National Park where cooler January temperatures make the lava hike more comfortable than summer, and the Road to Hana which sees fewer crowds in January than in peak summer despite excellent conditions.

January also brings lower summit temperatures at Mauna Kea - often below freezing with snow on the ground - so bring warm layers, gloves, and a hat for stargazing. The contrast between swimming in 74°F ocean water in the afternoon and standing in snow at 13,803 feet that evening is one of Hawaii's more surreal experiences and entirely possible in January on the Big Island.

For the full comparison of every month, see best time to visit Hawaii. For planning a complete trip, start with first time in Hawaii and which island to visit.