Hawaii is famous for its warm ocean water, beautiful beaches and year-round swimming conditions. Ocean temperatures around the Hawaiian Islands remain comfortable in every season, making Hawaii one of the best beach destinations in the world.
Hawaii Water Temperature
The ocean temperature in Hawaii stays warm throughout the year. Unlike many destinations where swimming is seasonal, Hawaii offers comfortable water conditions during winter, spring, summer and fall.
Average Hawaii Ocean Temperature by Month
Hawaii water temperatures usually range from about 76°F to 81°F (24°C to 27°C) depending on the season, island and local conditions.
| Month | Average Ocean Temperature |
|---|---|
| January | 76°F / 24°C |
| February | 76°F / 24°C |
| March | 76°F / 24°C |
| April | 77°F / 25°C |
| May | 78°F / 26°C |
| June | 79°F / 26°C |
| July | 80°F / 27°C |
| August | 81°F / 27°C |
| September | 81°F / 27°C |
| October | 80°F / 27°C |
| November | 78°F / 26°C |
| December | 77°F / 25°C |
Best Time for Swimming in Hawaii
Swimming is possible in Hawaii all year. The warmest ocean temperatures usually occur from August through October, while winter months are only slightly cooler.
Summer often brings calmer ocean conditions, especially around many popular snorkeling beaches, making it a great season for families and first-time visitors.
Best Hawaii Beaches for Warm Water
Some of Hawaii's sunniest coastal areas are especially popular for swimming, snorkeling and relaxing in warm ocean water.
Hawaii Snorkeling Conditions
Hawaii offers excellent snorkeling throughout the year. Conditions depend more on waves, wind and local weather than on water temperature because the ocean remains warm in every season.
Popular snorkeling destinations include Maui's west and south shores, Oahu's protected bays, Kona coast areas and Kauai's sunny beaches.
Winter Ocean Conditions in Hawaii
During winter, Hawaii's ocean remains warm enough for swimming. However, northern shores often experience larger waves, attracting surfers from around the world.
Summer Ocean Conditions in Hawaii
Summer usually brings warmer water temperatures and calmer seas in many areas. It is one of the most popular times for snorkeling, swimming and ocean activities.
Frequently Asked Questions
Can you swim in Hawaii all year?
Yes. Hawaii has warm ocean temperatures throughout the year, making swimming possible during every season.
What month has the warmest ocean water in Hawaii?
August and September usually have the warmest ocean temperatures, often reaching around 81°F (27°C).
Is Hawaii water cold in winter?
No. Hawaii ocean water remains comfortable even during winter, usually around 76°F (24°C).
Do you need a wetsuit in Hawaii?
Most visitors do not need a wetsuit for normal swimming or snorkeling because Hawaii's ocean temperatures stay warm year-round.