The phrase "winds about" can be interpreted in a few different ways, but if we consider it as a verb meaning to move around in a twisting or circular pattern, some possible antonyms could be: straightens, stays still, remains steady, follows a linear path, moves in a direct line. On the other hand, if we think of "winds about" as a description of the weather, the opposite could be something like clear skies, calm weather, no wind, or a steady breeze. Of course, context matters a lot when it comes to antonyms, so depending on the situation, other opposite expressions could be more fitting.