My novel is set on a planet covered in 90% water with no moons. How would the lack of natural satellites effect the waves and wind?
In fact, it will have small difference, mostly with tidal forces reduced. They will still be there from the central sun, so the Tide will still be in effect for your oceans. However it will have way lower amplitude.
The tide does generate waves globally, bit with less differences between high and low they will be generated in less manner by this thing. But they will still be generated standardly by the wind and heat processes (so heat exchanges between cold and warm seas by streams and similar).
The wind is not affected a lot by moon (but yes, there are tidal proccesses for athmosphere as well!), it is mostly affected by heat changes (so day/night cycle), by surface heat (on desert you will have more warm air than in forest), and by Coriolis force, that is caused by the rotation of planet. The heat problem is that warmer air is lighter, so tends to raise up. This is the main part of the "wind generator", causing the athmospheric circulation.
The moon has way bigger effect on sea tide than sun, as popularly known.However, for example this article mentions that the tide effect on higher athmospere is way bigger from the sun than from the moon, so the lack of the moon will have smaller impact on athmosphere tides than on sea tides.