December in Kona presents a compelling case for a Hawaiian escape, arriving when the island transitions from the slightly busier fall period into a state of serene stability. This month typically offers some of the most reliable weather patterns of the year, setting the stage for memorable experiences on both land and sea. You will find the air warm yet comfortable, the skies largely cooperative, and the ocean inviting for those who seek its warmth.
Temperature and Ocean Conditions
Average daytime temperatures in Kona during December usually range between the mid-70s and low-80s Fahrenheit, creating an ideal environment for outdoor activities without the intense summer heat. Evenings cool down to a pleasant mid-60s, perfect for dining on a lanai or enjoying a starlit walk along the shore. The trade winds, often gentle and consistent, provide a natural cooling effect that prevents the humidity from feeling oppressive.
The ocean temperature remains one of the most significant draws of a December visit, holding steady in the mid-70s Fahrenheit. This warmth allows for extended snorkeling sessions, paddleboarding adventures, and simply floating in the water without the need for a thick wetsuit. For context regarding the surrounding conditions, the following table outlines the typical climate data for the month:
Metric | Average Value
Average High Temperature | 80°F (27°C)
Average Low Temperature | 65°F (18°C)
Average Ocean Temperature
Average Rainfall | 2 to 3 inches
Average Humidity | 65%
Rainfall and Sunshine
December is technically part of Hawaii’s “winter” season, which means it is the slightly wetter time of the year, though Kona remains notably drier than the island’s windward (eastern) coast. You can generally expect a few brief rain showers, often passing quickly and followed by sunshine, rather than prolonged gray days. These rain events usually occur in the afternoon or evening and are a natural part of the island’s healthy ecosystem, feeding the lush vegetation and creating the spectacular waterfalls for which the islands are famous.
Sunshine still dominates the December sky, with the island enjoying approximately 7 to 8 hours of bright daylight. The angle of the sun is lower than in the summer months, which creates softer light and stunning golden-hour photography opportunities. Whether you are hiking the trails of Pu‘uhonua o Hōnaunau or relaxing on Hapuna Beach, you will find ample daylight to explore and unwind.
Activities Tailored for December
The favorable weather conditions make December an excellent month for a diverse range of activities. Snorkeling and scuba diving are particularly popular, as the visibility in the calm Kona waters is often excellent, and you might encounter manta rays cleaning stations or vibrant coral gardens. Surfing along the Kona coast is generally minimal, which makes the ocean safe for swimmers of various abilities and ideal for families.
For those who prefer to stay on land, December is a prime time for hiking and exploring the island’s interior. Trails like the Kealakehe Botanical Gardens or the shorter walks in the Waimea area offer breathtaking views without the intense heat of the summer. Whale watching season also begins in earnest, with humpback whales migrating to the warm Hawaiian waters to breed and calve, providing spectacular viewing opportunities from shore or by boat tour.
