For 85 minutes Southampton matched and often bettered Tottenham, but Spurs star Bale popped up yet again in the dying minutes to rifle home a superb 25-yard drive that gave the home side a crucial 1-0 win.
The strike brought his tally for the current campaign to 30 - double his previous best for a whole season - and it also means that he becomes the first Tottenham player since Jurgen Klinsmann to register 20 league goals in a season.
"At the moment the player is in outstanding form and is scoring goals out of nowhere, with great ability," the Spurs boss said.
"He is really enjoying his football and it was good for him to decide it once again.
"He had a difficult game at the beginning. He couldn't find the spaces to receive the ball.
"We weren't passing the ball properly, we were trying a lot of long balls and our game wasn't going our way. In the second half we managed to find him a little bit better, on the left and on the right when we changed it, and it was the only moment when Southampton left him, that split second."