Is it warm enough to swim in Hawaii in December?
Pacific Ocean temperatures on Honolulu shores are warmer than those of Hilo, but both are still swim-worthy at 77 and 73 degrees, respectively. Ocean temperatures in December all around the Hawaiian islands rest comfortably at about 77 degrees.
Hawaii's ocean temperatures are nice enough for swimming. In fact, you can swim anytime of year in Hawaii without needing a wetsuit.
The end of the month gets pretty busy in Hawaii with people flocking to this tropical paradise for the holidays. December is the most active tourist season for the islands. However, the rest of the month is tranquil making it a lovely choice for a winter getaway.
Daily high temperatures are around 81°F, rarely falling below 77°F or exceeding 84°F. Daily low temperatures decrease by 3°F, from 72°F to 69°F, rarely falling below 64°F or exceeding 75°F.
What Should I Wear in Hawaii in December? You can wear normal warm weather clothes in Hawaii in December. You might want a lightweight sweater during the night as it does get cooler generally into the 70s. Shorts, shirts, dresses, and swimsuits are perfect clothes to wear!
Yes!
Swimming in december is pleasant in Maui and the surrounding area. The sea temperature is 78°F on average (min/max: 76°F/79°F), allowing you to swim for a long time and enjoy water sports.
December is a hot and very rainy time for sunbathing in Waikiki Beach. December is an excellent month for swimming in Waikiki Beach with very warm sea temperatures. Consider visiting Waikiki Beach in the months of June, July, August, September, for the best beach weather.
Ocean Conditions
Temperatures on the shore of Honolulu are warmer than those of Hilo, but you can still comfortably swim. Ocean temperatures in December all around the Hawaiian Islands remain around 77-degree Fahrenheit, on average.
Yes! The water temperature in Honolulu (Oahu) in december is pleasant. Swimming in december is pleasant in Honolulu (Oahu) and the surrounding area. The sea temperature is 78°F on average (min/max: 75°F/80°F), allowing you to swim for a long time and enjoy water sports.
December is the worst month to visit Hawaii. Hawaii experiences a spike in visitors from mid-December to New Year, resulting in high accommodation, plane tickets, and rental car costs. December is also the wettest month of the year as temperatures cool across the Hawaiian islands.
What is the coldest month in Hawaii?
The coldest month of the year in Honolulu is January, with an average low of 68°F and high of 79°F.
You can swim in the nude at that temperature. All the islands have relatively the same ocean temperature in December. NOAA historical data shows Kauai with the warmest ocean temperature in December.

WINTER: breadfruit, citrus, longan, mangosteen, rambutan. SPRING: avocados, chocolate sapote, citrus, lychee, mangosteen, star apple. SUMMER: avocados, dragon fruit, egg fruit, jackfruit, lychee, mango, passionfruit, soursop.
We may wear a light jacket or sweater on the plane to and from Hawaii, but we don't typically use it during our stay. To be prepared in case of a cold snap, bring a light sweater or jacket. Long pants/trousers are not generally needed for keeping warm in Hawaii in the winter.
Although mosquitoes are not as numerous in Hawaii as they are on the mainland, they are still present. Some locations in Hawaii may have an exceptionally high concentration of insects due to the weather conditions. The most common kind of mosquito in Hawaii is known as Aedes aegypti or the Yellow Fever Mosquito.
Hawaii has some humid months, and above average humidity throughout the year. The least humid month is August (61% relative humidity), and the most humid month is December (66.4%). Wind in Hawaii is usually moderate.
When is the Best Time to Visit Hawaii? The best weather in Hawaii is in April, May, September, and October. November to March are the rainiest months, and June through November is hurricane season – though big storms are rare. Winter also brings the best waves for surfing, especially on north shore beaches.
December on Maui is the perfect escape from cold weather. Daytime temperatures remain comfortable in the low-80's and rarely drop below 70 at night. Though December is one of Maui's rainiest months, most rain showers (and large surf) are confined to the island's north shore.
Water temperatures are around 74 degrees so swimming is a year round activity here in Hawaii. If you're looking into boating, snorkeling, surfing or any other Hawaii activity this winter, be sure to book as soon as possible!
Where is the warmest water in Hawaii?
Swimming in Hawaii in december is pleasant
The sea water is 78°F on average (min: 75°F/max: 80°F) so you can easily spend time in the water.
Kauai. Kauai's lush greenery makes it, in my opinion, the most beautiful of all the Hawaiian islands. It is home to waterfalls, hiking trails and a variety of eco-adventures. Most travelers seek out Kauai to avoid the hustle and bustle of Oahu and Maui and have a more unplugged vacation experience.
As a general rule, Hawaiian waters average 77 degrees in the wintertime to 82 degrees in the summertime. Now, compared to the U.S. West Coast, Hawaiian waters are definitely much warmer (10-20 degrees warmer) than the waters off Southern California.
Hawaii Water Conditions – Temperature and Waves
Hawaii has warm water all year long. Averaging 77 degrees Fahrenheit, Hawaii is ideal for snorkeling without a wetsuit year-round. During the winter, the ocean temperature gets to 75 degrees Fahrenheit and the air temperature hits an average high of 80 degrees Fahrenheit.