Average temperatures of waters at the oceans’ surface in July were the highest ever recorded, the National Oceanic and Atmospheric Administration said. The agency said the average sea surface temperature was 1.06 degrees higher than the 20th-century average of 61.5 degrees. Though July was unusually cool in some areas, like the eastern United States, analysts at the NOAA Climate Data Center said the combined global land and ocean surface temperature was 1.03 degrees higher than the 20th-century average of 60.4 degrees, the fifth warmest since worldwide record keeping began in 1880. The agency also said that, on average, Arctic sea ice covered 3.4 million square miles in July, 12.7 percent below the 1979-2000 average and the third lowest on record, after 2007 and 2006.