Bay St Louis - Bayou Portage Entrance UV IndexUnited StatesMSHarrison CountyBay St Louis - Bayou Portage Entrance1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAABay St Louis - Bayou Portage Entrance UV forecast issued yesterday at 2:19 pm. Next forecast at approx. 2:19 pm.Get an account to remove ads