Biscayne Bay - MacArthur Causeway UV IndexUnited StatesFLMiami-Dade CountyBiscayne Bay - MacArthur Causeway1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAABiscayne Bay - MacArthur Causeway UV forecast issued today at 2:17 pm. Next forecast at approx. 2:17 pm.Get WillyWeather+ to remove ads