A Saturday in Saltaire has two speeds. Before eleven the village is quiet, cafes are opening up and the Mill has space to move in. Between eleven and three it fills up — dog walkers, day trippers, gift shoppers, coach parties — and peaks around lunchtime. After three it thins out again, the coaches leave, and the Mill and the park feel more like local places.
The honest move is to front-load the morning. Arrive by nine or earlier if you are staying nearby, get a proper breakfast at one of the cafes, and be in Salts Mill by ten. That gives you the 1853 Gallery and the main shops before the crowds arrive. After eleven, step out for a village grid walk — thirty to forty minutes is plenty — and you will have the streets almost to yourself because everyone else is funnelled into the Mill.
Lunch at one of the Mill cafes or a village pub, understanding that you will queue. From about one until three the towpath is the quietest part of the village because day visitors do not walk it, so this is the time to drop down to the canal and head west towards Hirst Wood, or east towards Shipley and Roberts Park. An hour out and back, or longer if the weather is holding.
By four the village is calming down. This is the best time to revisit the Mill for any shopping you skipped earlier, or to sit in Roberts Park with a coffee from the Half Moon Cafe. In summer there is sometimes a bandstand concert on Saturday evenings — worth checking the events page. In winter, this is when the light on the terraces is at its best.