9 Crystal River Florida shutterstock272006726.jpg

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This is the best place to go swimming with manatees and the best time is in September and October when there is a rise in the manatee population. Reputable outfitters can take you to the manatees without disturbing their fragile habitat and provide all the gear you need, including wetsuits. The water temperature in the river is a brisk 72 degrees year-round.