Is it too cold to swim in Hawaii in November?

The Pacific Ocean surrounding the islands remains warm enough for swimming all year round. As well, November marks the end of hurricane season in the Pacific. If you are planning to visit the more mountainous regions or volcanoes of Hawaii, you will want to bring a jacket.



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Per the National Center for Cold Water Safety, temperatures below 70°F are considered “dangerous” because most people have difficulty controlling their breathing. As a reminder, Hawaii's water temperatures stay several degrees above 70°F and are warm enough for swimming and snorkeling.

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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!

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Swimming in the winter in Hawaii isn't just possible—it's practically required. Okay, not really, but it is a favorite pastime for local Hawaiians and visitors alike. Thanks to warm daytime temperatures and just as warm ocean waters, winter in Hawaii is the same dream vacation as summer in Hawaii.

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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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Just keep in mind that March is prime time for spring break, so you're more likely to see more kids and families, including partying college students. In my long experience you are more likely to have rain in March than in November. It will also likely be cooler in March, typically one of the cooler months in Hawaii.

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August is the hottest month in Hawaii with an average temperature of 27°C (81°F) and the coldest is January at 23°C (73°F) with the most daily sunshine hours at 11 in July. The wettest month is November with an average of 124mm of rain.

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Best Time for Snorkeling and Swimming: Great swimming and snorkeling are possible year-round in Hawaii, but during summer months (May through September) water is warmer, waves are smaller, and skies are sunnier, making conditions ideal for these water-based activities.

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Summer is the best time to take a dip in the warm Hawaiian waters. The ocean temperature hovers around 82°, and the wind and surf are reliably low. Visitors of any experience level can enjoy snorkeling in the clear, calm summer sea.

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In Miami Beach, water temps average as low as 71°F and as high as 86°F. In comparison to Hawaii, Miami's water temperatures dip lower than Hawaii's in the winter, but are a bit warmer in the summer. For a look at other coastal temperatures, see this link to the NOAA data.

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