Update #4 ·

At What Temperature Does Seawater Freeze?

  • 32°F (0 degrees Celsius) (15% people answered this)
  • -4°F (-20 degrees Celsius) (40% people answered this)
  • 23.2°F (-4.88 degrees Celsius) (25% people answered this)
  • 28.4°F (-1.9 degrees Celsius) (17% people answered this)

1408 people answered.


Correct answer is: 28.4°F (-1.9 degrees Celsius)

While fresh water will freeze at 32°F (0 degrees Celsius), seawater freezes at 28.4°F (-1.9 degrees Celsius). Since only the water part freezes, you could theoretically melt it down to use as drinking water! Average ocean temperatures are 38.3°F (3.5 degrees Celsius).


Ocean  Conservancy  is  working  hard  to  see  that  the  ocean's  most  extraordinary  places  are  preserved  for  future  generations  to  use  and  enjoy.

In light of today being World Water Day, we wanted to send a fun quiz your way to celebrate the ocean, which represents 71% of the Earth's surface and 97% of its water!

The importance of water cannot be understated, but it is only one part of all the reasons that the ocean matters. Once you've taken the quiz, take a look at our new webpage to see why the ocean matters, and let us know what makes the ocean special to you!

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Please help us support an early restoration project that will help heal the Gulf of Mexico by protecting loggerhead turtle nesting grounds. Sign the petition today. This critical work will go a long way toward helping the recovery of threatened sea turtle populations by: • Eliminating or replacing existing lighting to reduce harm to turtle nesting grounds; • Retrofitting streetlights and…

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Much of the trash on our streets and in our neighborhoods ends up in our waterways, beginning a long, slow march to the ocean. And this trash, slowly degrading our ocean, impacts the food we eat and the water we drink. Join Ocean Conservancy and pledge to take on the trash. It's simple—do what you can to reduce your trash impact, clean up an open space near you or even join the 27th annual…

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