Is the water warm in Hawaii during winter?

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. No comparison really for the U.S. West Coast.



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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.

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Ocean Conditions Even though January is one of Hawaii's cooler months, the ocean temperatures are still warm enough to allow you to swim comfortably. You can expect the ocean temperatures to reach around 72 to 76 degrees F, making the water just slightly cooler than the outside temperatures at the peak of the day.

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According to data from the National Oceanic Atmospheric Association (NOAA), the warmest water off Honolulu can be found from July to September—averaging 80 to 81 degrees Fahrenheit. However, Honolulu water temperatures drop to only 76 degrees in January, according to NOAA.

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So overall, compared to those warm water areas of the U.S. Gulf and Florida, Hawaiian waters are warmer in the winter and cooler in the summer. As a general rule, Hawaiian waters average 77 degrees in the wintertime to 82 degrees in the summertime.

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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. No comparison really for the U.S. West Coast.

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The best time to visit Hawaii is between March and September. This is when the islands see the highest temperatures and the lowest amount of rain.

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You'll want to bring a light jacket or sweater; evenings can be cool. Rain probably won't be an all-day affair, but the north shore will certainly be cooler, and it gets more rain in winter. South shore should be warm and sunny. For swimming in winter I wear the equivalent of a short-sleeve rash guard.

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April thru June and mid-August thru mid-September are Hawaii's low seasons, and airfares are lower then. No matter what time of year you travel, you may be able to score better deals if you travel midweek.

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While many vacations are five to seven days long, we recommend staying for at least 10 days to enjoy your Hawaiian vacation. The time change is difficult to adjust to at first and takes about 3 days to get fully acclimated. So, allowing a couple days to get over the jet lag is important.

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Hawaii has semi-tropical weather. Temperatures usually range from 75-90 degrees year round in the daytime, and 70-80 degrees at night. Temperatures in the winter months may be a little cooler, where nighttime temperatures can sometimes fall into the 50's.

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Hawaii weather is warm and humid, with temperatures between 70ºF to mid 80ºF and the pleasant trade winds. Even so, you'll need pack at least one pair of long pants and a light sweater.

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