The finish has been lacking but the movement has been good.
On a day of sunshine, showers and bitingly cold winds at Burnley, he twice came up with the right finish to keep the Albion bandwagon rolling.
And to see them through a test which is tougher than probably appears at first glance.
The Seagulls, missing two of their experienced cornerstones in Lewis Dunk and James Milner, had to ride out squally storms in East Lancs.
Bart Verbruggen made a really important save with his right foot and the hosts had two goals disallowed for marginal offsides which were confirmed by VAR.
But they picked up their fifth win in six games thanks to Wieffer’s double.
He swept home a low cross from Pascal Gross with the sort of assured first-time finish the otherwise lively Yankuba Minteh should have produced earlier.
And he resolved a messy bit of play near the end by guiding home right-footed just inside the post.
“Wieffer again,” is the regular chorus in his honour from Albion fans and they had every reason for that this time as he finally made the points safe right in from of the away section.
What might have been the customary draw here was instead reason for more celebration as Sussex By The Sea rang out loud and clear.
It would have been maddening for Albion had they let points slip here and that might have happened but for Verbruggen saves.
They gave the hosts too many chances for set-piece specialist James Ward-Prowse to put dangerous balls on to the bitter wind.
But they did enough against a forgiving Clarets side to complete a third successive away win and clean sheet.