About a 2 foot tide change. The best part of Stuart is you can kite between the Stuart Causeway with nice flat water and can ride on any breeze direction or a few feet away to the beach. Waves are usually about knee to waist high.
Always bigger kites. People don't bring anything below 10sqm and you can't go too big. Always remember that breeze can be up in the morning and down in afternoon or vice-versa. Northeast to Southeast is very common. Best is sideshore (South, North). Come in January or Febuary if you don't mind a lot of breeze but chilly. Season is 12 months. Wind has no real season here but January and February is most consistant.
Get on I-95 to Stuart, take Kaner highway to US-1, north on US-1 to Monterey. Take that road to end and take a right and 5 minutes later your at Stuart Beach. You can't get lost. Signs and people are everywhere. Just follow it to the beach.