"Basically lightning stays more on the surface of the water rather than penetrating it. That's because water is a reasonably good conductor, and a good conductor keeps most of the current on the surface." So, when lightning hits the water, the current zips across the surface in all directions.

Why is lightning attracted to water?

usually unsafe places during a thunderstorm because the current from a lightning strike will travel easily through the standing water, showers and other plumbing. ... Water does not "attract" lightning. It does, however, conduct current very well. It's not clear how far lightning travels through water.

Is it common for lightning to strike water?

Bodies of water are frequently struck by lightning. ... When lightning strikes, most of electrical discharge occurs near the water's surface.