The variability of the dome-like form position of the Weddell Sea Deep Water (WSDW) has been studied based on ORAS5 datasets. According to these data, the upper boundary of the deep water occupied the highest position during most of 2005, and the lowest position in 2014 relative to its mean for 1993–2023. This change occurred because of the intensification of negative wind vorticity in 2005 and its weakening in 2014. Between 1993 and 2023, a permanent water transport from the Weddell Sea to the Scotia Sea was detected over the depth corresponding to the sill in the Orkney Passage in the ORAS5 data. In 2005, this transport was almost unchanged, whereas in 2014 it became stronger. When the dome boundary of WSDW moves up in the central part of the Weddell Sea, the outer parts of the dome move down, and vice versa. In the northern part of the Weddell Sea, this motion of isotherms and isopycnals causes either colder or warmer water parts of the WSDW column to overflow the crest of the South Scotia Ridge and continue its motion in the Scotia Sea.