Аннотация:Sat el lite data on sea surface temperature and temperature and salinity profiles in north eastern shelf of Sakhalin showed that during the periods of advection of warm and low-salinity wa ter to the east ern shelf of Sakhalin, in ten sive coastal upwelling did not develop, even under favorable wind conditions. Reg u lar deep en ing of the thermocline/halocline has pre vented the rise of cold and salt water to the sea surface. Nu mer i cal ex per i ments with the INMOM-JRA55-do model showed a sig nif i cant deepening of the thermocline/halocline accompanied by the in creas ing den sity strat i fi ca tion, which pre vented the dis charge of the Sea of Okhotsk wa ter to the sur face. It is assumed that the joint mon i tor ing of wind conditions and hydrology on the east ern shelf of Sakhalin in the second half of the year will significantly clar ify the fea tures of its de vel op ment and more accurately assess the biological productivity of water in this area of the Sea of Okhotsk.