I had a ride today that started out with very light W winds but the wind came up over the afternoon and I ended the ride with 18 miles into a 15 mph N headwind. I got home and uploaded the ride to Strava. The overall results were disappointing. I knew that my overall speed suffered during the last leg but my estimated wattage was way down as well. I created a couple of segments and the first two-thirds of the ride were as expected. The wind picked up during the last third of the ride and as mentioned was head-on for the last quarter. I knew what my speed over that segment was going to be but the wattage was also way down even though this was the most difficult segment of the ride. Is there any way to input wind speed and direction to get more accurate power estimates from Strava?

I've run into this before when I've had to shift down and power into the wind like a steep grade, but the wattage reads as if I was out for a leisurely cruise on a calm day.