This study mainly focuses on the seasonal and interannual variability of sea surface salinity (SSS) in the Central North Arabian Sea (CNAS) by using Aquarius/Satelite de Aplicaciones Cientificas-D (SAC-D) and the Soil Moisture and Ocean Salinity (SMOS) satellite measurements,and gridded Argo field data from 2011 to 2015.The mean state of spatial SSS variation is consistent among Argo,Aquarius,and SMOS datasets.CNAS has relatively higher SSS with mean of 36.5 practical salinity unit (psu).The lowest SSS in the studied area occurs during February to March and rapidly increases after April.SSS reaches its maximum during the mature phase of southwest summer monsoon period.The CNAS SSS shows significant seasonality due to the advection and evaporation associated with high monsoon winds.As a result of southward advection,high salinity water from the Gulf of Oman and the existence of Ras al Hadd Jet,contribute to the highest SSS during the southwest monsoon period in the CNAS.Northwestward advection of low salinity water from the south,leads to the salinity reduction during northeast monsoon periods in the region.This low SSS advection can reach the Oman Sea during the late winter monsoon period.The inter-annual variability of the CNAS SSS is mainly associated with the monsoonal ocean circulation that triggered by the regional monsoon variation.In particular,it depends on the strength of the northeastern Arabian coastal currents,which transport low salinity water northwestward.