<p>Sea surface temperature (SST) has been globally rising since the mid-20th century with significant impacts on marine ecosystems. This study investigates temporal and spatial SST changes across latitudes and longitudes during warm and extreme warm seasons (as the upper 75th and 95th percentiles of daily SST values) using NOAA 1/4 degree daily OI satellite data (1982–2018) and quantile regression model. The results show that 88% of the analyzed areas experience a positive SST trend during the warm season, with 63% of these trends being statistically significant (<i>p</i>-value &lt; 0.05), particularly in the northern hemisphere and higher latitudes. During the extreme warm season, 95% of the analyzed water bodies exhibit an increasing SST trend, with 45% of these trends being statistically significant (<i>p</i>-value &lt; 0.05). Notably, the warming trend is more pronounced in the warm season compared to the extreme warm season, with significant increases in the Atlantic and Pacific Oceans and various closed water bodies and bays. SST variations reveal heterogeneous patterns along longitude within three latitude regions (0^o-20^o, 20^o-40^o, and 40^o-60^o). The eastern coasts of the Pacific Ocean and western coasts of the Atlantic Ocean in the northern hemisphere experience significant warming, while coastal waters in Southeast Asia exhibit cooling trend. In the southern hemisphere, severe warming is noted in the western parts of the Pacific and Atlantic Oceans; however, coastal waters in South America and Australia demonstrated both warming and cooling trends. These findings indicate the importance of assessing temporal and spatial changes in SST globally. They enhance our understanding of changes in marine ecosystems and facilitate exploration of underlying causes and potential consequences to mitigate these changes.</p>