"Most of the squad have not played any sevens for weeks and it does take time to get used to the game again. I hope that by next weekend in Edinburgh we will have shaken off the cobwebs," he said.
Beach added: "Overall it was a disappointing weekend for us. I suppose you could say that it was the sum total of all the little things that didn't go right. But even so we were able to dig deep against Argentina.
"We just need to fine tune some elements of our game. We perhaps attacked too flat and that prevented us from running on to the ball at pace"
Wales had begun the second day of the Emirates Airline London Sevens at Twickenham with what was an expected win over Georgia in the first of the Bowl quarter finals.
Tries by Ifan Evans and Tal Selley gave Wales a 10-0 interval advantage and the confidence for the team to express themselves in the second half. Beach began the post interval scoring which continued with tries by James Merriman, Ifan Evan, leaving Tom Edwards to wrap up the tie for a place in the semi final.
Then in the Bowl semi final in what was a repeat of the Rugby World Cup Sevens final against Argentina, Wales were saved by a last gasp try from Craig Hill after trailing the Pumas for the entire match.
Converted tries from Gaston Revol and Hernan Olivari to a Wales try from Ifan Evans converted by Aled Thomas gave Argentina the lead at half time with the scoreline at 14-7.
A solo effort from Tom Isaacs signalled a Wales fightback but it took a great run from Hill to take Wales into the Bowl final to face Kenya.
Then in the final Wales were put on the back foot with two first half tries from Kenya to trail 12-0 at the break. A try by Will Harries in the second half gave hope but further scores were not to be against an aggressive Kenya defence leaving Wales to settle for runners-up spot.
Wales Tom Edwards (Pontypool), James Merriman (unattached), Tal Selley (Dragons), Ifan Evans (Llandovery), Rhys Shellard (Cardiff), Aled Thomas (London Welsh), Lee Beach (Neath), Rhys Jones (Cornish Pirates), Will Harries (Northampton Saints), Tom Isaacs (Newport), Craig Hill (Newport), Jevon Groves (Cross Keys)