The Millwall man has been struggling with a calf injury since the 1-1 draw with England last Wednesday, but goalkeeping coach Alan Kelly is hopeful that he will join in with the rest of the group on Thursday.
Kelly said: "He's coming on. The doctor and the medical staff have done a fantastic job."
He added: "He did a bit of work with me, he's been in the gym this morning and he's looking to train fully tomorrow."
Forde will hope to make himself available, but Keiren Westwood and Darren Randolph are standing by to replace him if he fails to shake off the problem.
However, there was a boost for manager Giovanni Trapattoni this morning when both Richard Dunne and Marc Wilson were able to train at Malahide.