Castaway Cay Weather Posted on September 7, 2012 by Scott Sanders [Wx_Port arg=”3″] Disney does not provide weather information for Castaway Cay to the public. This forecast is from Marsh Harbour Airport. Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on LinkedIn (Opens in new window)