Since you are into a total weather package, why not include the tides much like moon phase and sunrise/sunset. I have quite a few people in the fishing industry that have asked me this.
I registered so I could request this also...
TIDES - I fish daily, sail, and am around the water. Having the tides in one app would be the total package for me.
But this was asked for almost a year ago. It shouldn't be that hard of a feature to add.