The water at the time was around 40 Fahrenheit/9 Celsius. That gives you, if you survive the fall — which includes not inhaling water with the human gasp response when you hit the cold water or breaking you pelvis/legs/back on the at-that-height now concrete-consistency water (~20 feet/7 meters or above) — a rough seven minutes to get to shore and wrapped up nice, tight, and warm to prevent hypothermia.