The pilot reported that, while on step, during takeoff from an ocean bay, as she turned the float-equipped airplane into the wind, the left wing and float raised. The right wing impacted the water and the airplane pivoted about 90° clockwise before coming to rest partially submerged on its left side. The airplane sustained substantial damage to both wings. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The pilot added that, it was suggested that the airplane may have encountered a whale, but she did not feel any impact or bump during the takeoff. The NTSB was provided a video of the takeoff taken from the shore. In the video the airplane is seen making a sweeping left turn on the step, moving away from the camera. Wind indications in the video show the wind coming from the airplane's left. The left turn appears to tighten as the airplane comes into the wind, the left wing and float appear to lift, and the right wing strikes the water ending the takeoff run. The automated weather observation system about 4 nautical miles from the accident site reported that, about the time of the accident, the wind was from 330° at 8 knots. The pilot was departing to the northwest. The pilot reported that the wind at the accident site was light and variable at 0 to 5 knots.