Question

What is the Author implying in the phrase the wind must have been right

Answer 1

Wind is often used for directional and navigational purposes, so this could mean that the author followed something by the wind whether it be how high or low the air- pressure is or which way the wind is blowing. Aswell as the fact that Wind is a major factor in weather determination. For example, if the wind blows ina counter- clockwise direction, then the air pressure is low which means that the weather is or will be bad like rain or storms. 
Hope this helps!