Image: These globes show surface temperature anomalies for August. Temperature is compared to the average global temperature for Augusts from 1961-1990.
Ocean temperatures averaged 62.5 degrees Fahrenheit in the June-August period, 1 degree higher than normal.
Last month also saw the warmest August sea-surface temperatures on record at an average of 62.4 degrees, also 1 degree higher than usual, NOAA's National Climatic Data
The combined land and water temperature worldwide for June-August was 61.2 degrees, third warmest in 129 years of recordkeeping. For August it was 58.2 degrees, fourth warmest.
"Large portions of the world’s land mass observed warmer-than-average temperatures in August," NOAA said in a statement. "The warmest departures occurred across Australia, Europe, parts of the Middle East, northwestern Africa, and southern South America. Both Australia and New Zealand had their warmest August since their records began."