No - your homeowners insurance does not cover or extend over to the use of your boat/watercraft.
You would need to obtain a separate boat policy to help insure your boat property (similar to an automobile policy) as well as liability arising from the use of your boat on the water.
If your boat is parked in the garage or on your property and it is damaged due to a covered peril then there may be coverage. For example a Fire in the garage destroys your boat. But as a rule you should carry separate Boat insurance to protect your boat and also to protect yourself for liability in the event of a boat accident.
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You would need to obtain a separate boat policy to help insure your boat property (similar to an automobile policy) as well as liability arising from the use of your boat on the water.