Watercraft cover

A cover for a personal watercraft, the cover comprising:

• a fabric sized to be received over a portion of the personal watercraft enclosed by a railing;
• a post coupled to an undersurface of the fabric at a cover/post connection, the post sized to extend from the undersurface to a supporting surface of a deck of the personal watercraft;
• and
• a tension assembly comprising:
• a tension loop slideably coupled to the fabric and extending from the cover/post connection to a periphery of the cover;
• and
• a tensioner fixed to the fabric and operable to tension the tension loop, such that actuation of the tensioner induces the fabric to tension around the post.