Not wishing to impinge on NP's encyclopedic knowledge of cable cars:nuts:, but many studies have found cable cars suprisingly resistant, far more than a boat on choppy water.The real issue is wind direction in relation to the line rather than speed itself. You will usually have an anemometer on each tower along with sway measurement
There's quite a lot of tech out there to limit sway. Cable cars can operate in horrendously high winds and are usually very stable, so long as you slow them when they pass each other and towers. Dual mono-cable gondolas essentially use one 'side' of the cable to act against the other in wind [bit more nuanced than that in reality].
Never say never but I'd be surprised if you lost more than a day or two a year because of wind in this region.
The benefit of a cable car over the Tyne is that it could extend the crossing from the riverbank but from Metro station to Metro station.
Like a high level bridge so to speak.