The R.I. Historical Society have their usual annual Lovecraft’s birthday walk “H.P. Lovecraft: A Literary Life” on 17th August this year, rather than the actual birthday date of the 20th. I assume there may be a few tickets left.
They also have a H.P. Lovecraft Literary Walking Tour in October, in the run-up to Halloween: “October 19, 20, 26 & 27, 2019”, when I guess it may be cooler and less humid for hill-walking in Providence.