Isle of Bute - Glencallum Bay UV IndexUnited KingdomSTArgyll and ButeIsle of Bute - Glencallum Bay1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAAIsle of Bute - Glencallum Bay UV forecast issued yesterday at 7:51 pm. Next forecast at approx. 7:51 pm.Get an account to remove ads