There is a private lot with 18 parking spaces located right on Bowen's Wharf for $4 per half hour.
You'll probably find it less expensive to Uber from your hotel, downtown parking can be $$$ and fills up very fast.
There are parking spots in parking lots close to Bowen's Wharf, but not right at Bowen's Wharf.
There is paid parking. It is expensive but that's Newport.
There is an expensive and small parking lot. I recommend that you park at the Transportation and Visitor Center (23 America's Cup Avenue Newport, RI 2840) and walk over. It's $3/hour or $25 overnight. It's a 5 minute walk.
There is not.
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