The Bay of Bengal (BoB) is a high energy active region,dynamics of BoB varies during short term with huge effect over the planktonic environment."Wind pump" induces vertical mixing in the BoB region,which affects the sea surface temperature (SST) and chlorophyll-a (chl-a).This study demonstrates the temporal/seasonal variation of chl-a concentration and its relationship to SST and wind speed.Monthly averaged Aqua-MODIS chl-a data for a period of 10 years (2006-2016) and Sea WiFS monthly climatology data were analyzed.Based on monsoonal chl-a and SST variability,we appraised their relationship and variations over the BoB.Trend analysis of chl-a concentration values shows that vertical mixing is very low in this region with weak annual phase,which reaches its maximum in winter and minimum in summer.About 0.50 mg/m³ is observed during winter as the maximum chl-a concentration value and then decreases since February until summer monsoon period.Summer monsoon period is identified as lack of chl-a concentration,compared to winter monsoon period.In summer monsoon period,especially in July and August,satellite sensors couldn't capture chl-a concentration values accurately due to the dense cloud cover.The R² value for relationship between chl-a concentration and SST is observed to be 0.218 1.