Most west side trips toward downtown or across the river run along Circle Drive or one of Saskatoon's bridges, and how long that takes from Forest Grove depends far more on the time of day than on the actual distance.
Bridge and Circle Drive traffic at peak hours is the real variable in a Forest Grove commute, more so than for a neighbourhood already close to downtown, so it is worth timing your actual route before judging it from a map.
Joel Dyck can walk you through what a real Forest Grove commute looks like for your specific routine. Get your hand-reviewed valuation from Joel Dyck.