Often does this to me during the work day. Rarely in my favour.
Same here.
It's usually a direct headwind for the whole 20 miles in to work, and then during the day, it almost always shifts round to become a 20-mile cross-headwind on the way home......and quite often a full-on headwind on the return.
I get a tailwind on both the way in and way home on approximately one to two days a year.....if I'm lucky. And that's doing the commute by bike five days a week year-round!
In fact, the b*stard shifting headwind was one of the main contributory factors to
getting an e-bike for my gruelling commuting workload. Combined with my hillyish road route being only marginally smoother than the Carrefour de l'Arbre and Trouée d'Arenberg, the relentless changing wind direction was becoming too much after several years doing this commute - it was severely curtailing my ability to ride on Saturdays...and even Sundays.
E-bikes are a great wind-busting commuting tool - especially if one has a tough commute but also wants to ride at weekends.....and has access to secure storage at work. But on Britain's rough and appallingly maintained rural lane network, their weight and stiffness mean fitting the widest possible tyres is almost essential - I've graduated from the 32mm tyres that came fitted, via 37-38mm tyres, to settling on 42mm tyres as the optimum for my Giant Road E+1.