The Rosewell House handler admits he could do with some rain for his main players at the two-day feast on September 13 and 14.
Forgotten Rules and Pale Mimosa are Weld’s leading hopes from four entries in the Group One Palmerstown House Estate Irish St Leger at the Curragh on the second day.
“Forgotten Rules and Pale Mimosa are in great form but they both need a cut in the ground,” said Weld.
Pale Mimosa, winner of the Lonsdale Cup at York last month, could only finish seventh behind her then-stablemate Voleuse De Coeurs in the Irish Leger last season as Weld recorded his seventh win in the Classic.
Weld added: “The same can be said of Carla Bianca who holds an engagement in the Blandford Stakes on the same afternoon.
“The weather seems set fair for the coming days so we will wait and see for the moment and make a final decision about all our horses later next week.”
Meanwhile Sea The Moon puts his position as Prix de l’Arc de Triomphe favourite on the line when he goes to post for the Grosser Preis Von Baden at Baden-Baden racecourse tomorrow.
The Markus Klug-trained colt is unbeaten in four career starts and takes the next step to possible European dominance in a Group One race used by Danedream to perfect her challenge for the Arc in 2011. She also won the 2012 renewal before a last-minute quarantine issue forced her to miss her Paris defence.
Sea The Moon sprang to prominence when winning the German Derby by 11 lengths and the second horse, Lucky Lion, came out and beat Noble Mission at Munich next time out.
However, Klug has warned the big day for his runner will be at Longchamp on October 5, and expects improvement after the weekend.
He said: “He (Sea The Moon) is in good form. He is not quite 100 per cent, but we want him to be 100 per cent in October, not now.
“I am happy with him, though, and we are hoping for the best.”