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MapMaster 3

Mean Sea-Surface Temperature

OceansPhysical Environment

Average sea-surface temperatures between 1990 and 2020

NOAA

Mean sea-surface temperatures shown using patterns of latitudinal bands extend roughly east to west. The coldest temperatures are shown in the northern latitudes. Temperatures warm as latitudes near the equator.

Sea-surface temperatures create latitudinal bands extending east to west, influenced by ocean currents and continents. In the tropics, temperatures range from 24.0 to 32.0 degrees Celsius; in the midlatitudes, from 8.0 to 23.9 degrees Celsius; and in higher latitudes and polar regions, from negative 2.0 to 7.9 degrees Celsius. Significant deviations occur along the Atlantic coast of western Europe, where temperatures are warmer than the east coast of North America at the same latitude, and along the Pacific coast of Canada, the Atlantic coasts of Canada and the northeastern United States, and the western coasts of South America and southern Africa, where waters are cooler than expected. The hottest ocean areas are between Indonesia and Australia (30.0 to 32.0 degrees Celsius), followed by tropical parts of the western Pacific and Indian oceans, and small areas along the coasts of West Africa and Central America (28.0 to 29.9 degrees Celsius).

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Mean Sea-Surface Temperature

Continental Shelf

Barren or Sparsely Vegetated Areas

Major Territorial Acquisitions (U.S.)

-2.0 to 0.0

0.0 to 1.9

2.0 to 3.9

4.0 to 5.9

6.0 to 7.9

8.0 to 9.9

10.0 to 11.9

12.0 to 13.9

14.0 to 15.9

18.0 to 19.9

20.0 to 21.9

22.0 to 23.9

24.0 to 25.9

26.0 to 27.9

28.0 to 29.9

Continental Shelf

Barren or Sparsely Vegetated Areas

Extent of U.S., 1803

Louisiana Purchase, 1803

West Florida, 1810–1813

British Cession, 1818

East Florida, 1819

Northern Maine, 1842

Texas Annexation, 1845

Oregon Country, 1846

Mexican Cession, 1848

Gadsden Purchase, 1853

Alaska, 1867

Hawaii, 1898

Ontario
0.375%
Northwest Territories
0.540%0.420%
Nunavut
2.12%1.49%
Nova Scotia
1.84%0.489%0.275%0.472%3.29%
Prince Edward Island
5.18%12.7%
New Brunswick
0.647%0.219%0.785%
Newfoundland and Labrador
1.04%0.607%2.04%
Québec
0.165%0.215%
Alaska
0.243%0.756%0.368%1.23%94.5%
Arizona
2.59%76.2%23.8%
Utah
6.05%100%
District of Columbia
97.6%
Florida
0.797%0.110%0.317%0.665%1.79%98.3%
Idaho
99.8%
New Hampshire
99.9%
Rhode Island
4.89%5.84%97.7%
Vermont
99.9%
Washington
0.825%0.997%99.4%
Wyoming
70.3%4.53%12.4%12.7%
Montana
82.4%17.6%
Maine
0.534%0.686%82.4%16.6%
North Dakota
57.6%42.4%
Kentucky
99.9%
Virginia
0.725%0.705%99.5%
Delaware
1.06%2.06%98.0%
Mississippi
92.2%7.44%
West Virginia
100%
Nebraska
100%
Texas
0.214%0.261%99.5%
Missouri
99.7%
Louisiana
1.00%1.29%86.4%12.4%
Hawaii
10.0%0.778%4.46%91.5%
North Carolina
0.239%0.183%0.286%0.611%99.2%
Oregon
99.8%
Alabama
0.114%0.101%95.7%4.16%
New Mexico
57.5%40.3%2.23%
Kansas
91.7%8.26%
Wisconsin
0.545%99.8%
British Columbia
1.06%1.05%1.43%
New Jersey
0.163%1.14%2.40%99.0%
South Carolina
99.6%
Michigan
1.89%99.9%
Connecticut
0.194%0.150%99.6%
Pennsylvania
100%
Colorado
41.3%32.3%26.4%
Nevada
1.08%99.9%
Massachusetts
1.32%2.66%0.220%4.75%98.1%
Georgia
0.230%0.232%99.8%
New York
0.265%0.344%0.761%99.4%
Maryland
2.09%2.12%96.9%
Oklahoma
91.6%8.45%
Tennessee
99.9%
California
0.120%0.206%0.133%7.01%99.7%
Arkansas
99.8%
South Dakota
99.1%
Ohio
100%
Indiana
100%
Minnesota
33.8%45.1%20.9%
Iowa
99.8%
Illinois
99.7%
0.16.0