Coldest seawater

Last updated: March 28, 2020 at 4:13 am

Seawater with an average salinity of 35 ppt (parts per thousand) freezes at -1.94°C (28.5°F). The coldest seawater ever recorded at −2.6 °C (27.3 °F) was found in a stream under an Antarctic glacier.

“Sea ice covers about 7% of the Earth’s surface and about 12% of the world’s oceans. Much of the world’s sea ice is enclosed within the polar ice packs in the Earth’s polar regions: the Arctic ice pack of the Arctic Ocean and the Antarctic ice pack of the Southern Ocean.”¹


EDITOR’S NOTE
The record for the coldest salt water, which is not from a marine environment, is listed separately.
Sylte, Gudrun Urd (24 May 2010). Den aller kaldaste havstraumen. forskning.no
¹ Sea ice. (2018, January 4). In Wikipedia, The Free Encyclopedia. Retrieved 17:29, January 5, 2018, from https://en.wikipedia.org/wiki/Sea_ice

Please note that comments are moderated: (1) Stay on topic (2) Be respectful (3) Refrain from vulgarity and abusive language (4) Do not make personal complaints about a person’s character, business, work or associations (5) Do not publish materials that violate copyright. OFFENDING COMMENTS WILL BE DELETED.
If you have claim to a diving or underwater record or first, if you know of a significant first or record not listed here, or if you can demonstrate that any of the information on this website is false or outdated, please complete the form on the record submission page.
In order to ensure your browsing experience is as enjoyable as possible, banners are kept to an absolute minimum, which means that advertising revenues alone cannot sustain this 100% FREE publication. Researching and updating the Diving Almanac requires a lot of time and dedication. If you believe the diving community needs a central body of information to record, validate and make available our shared history and accomplishments, please show your support by making a contribution to the Diving Almanac via PayPal (Porbeagle Press). Thank you!