Rochester has a contemplative moment on a cloudy summer day that's more reminiscent of an English summer than a Caribbean one. He mentions that it's almost hurricane season, which runs from August to October.
His thoughts reflect his conflicting feelings toward Antoinette. He starts by thinking of how much he hates her, how she'll cheat on him with anyone and everyone, how crazy he thinks she is, and how he'll make sure that she loves and is loved by no one. He plans to break her just as a hurricane wind blasts a tree.
Then his thoughts take a sentimental turn. If only her "blank hating moonstruck face" would show some emotion, if only she would shed a tear, he would embrace and console her – as long as her emotion is presented to him, for him alone to enjoy. He calls her his "mad girl" (II.7.18).
The subsection ends with his noting that the weather has changed, a reference back to the cock crowing in the previous section.