Swansea captain Richard Stratford cited poor weather conditions as a major factor in his side’s defeat.
The opening day fixture was an extremely tight affair and Stratford felt the weather restricted his side from playing their normal game.
He said: “It’s difficult to play good rugby in these conditions.
“We are a technically-able side so naturally you would want to play on a surface which helps that.
“I felt we were disadvantaged in that we couldn’t play our typically attractive game.”
Despite early Swansea dominance in the scrum, neither side could gain a foothold on the game.
Strong winds also proved to be a thorn in the Swansea side as two Sam Butler kicks were taken off target.
But Swansea could do little about the game’s only try through Cardiff wing Alistair Henderson which Bryn Phillips duly converted to seal the victory.
Swansea University 3rds 0-7 Cardiff University 3rds