Some days you've just got to take what the road gives you.
Winds are like climbing hills, except they never end and you don't get to ride downhill at the end. Keep riding, consider it extra training, and don't worry about the speedometer.
As I've posted before, on my TransAm trip I set the cyclocomputer to display cadence and daily mileage. The mileage helped keep me on track; the cadence didn't mean much, so I didn't waste energy paying attention to it, and didn't get discouraged by how slow we were going.