There has been a lot of discussion recently about the record warming trends that have been observed globally in recent months. This includes an observed basin-wide warming of the ocean and an increase in marine heatwaves. Marine heatwaves occur when ocean temperatures in a given region are well above average for an extended period of time. Warmer ocean temperatures impact the marine environment and associated ecosystems, and ocean heat can also fuel developing tropical cyclones. Leading ocean scientists have made a collective assessment of recent global trends and report on what we may expect in the future.