During 1951–2015, Sea surface temperature (SST) averaged over the tropical Indian Ocean showed a rise of about 1°C, compared to 0.7°C rise in the global averaged SS. The Ocean heat content (OHC) in the upper 700 m of the tropical Indian Ocean has also shown an increasing trend over the past six decades (1955–2015), with notably abrupt rise in the last two decades (1998–2015).