"...Oct is good, as cusp of high season"
nope, Oct is low season, its rainy and the sea is mostly unsafe, ( rips and currents, waves) for swimming till early Nov
high season starts Nov 20th or so
As far as Kamala goes, ( an the island) out of the 28 years i have lived here in Kamala, last year was the first time there was really no low season , tourists are here year round now. ;-( although Oct is not nearly as bad as Dec-March