Water has a dielectric constant of about 80 (compared to about 1 for air), so the cable capacitance will be greater. How much depends on the construction of the cable.

You can measure it by dunking the cable and using your multimeter capacitance range.

Water has a dielectric constant of about 80 (compared to about 1 for air and perhaps 4 for plastic insulation), so the cable capacitance will be greater. How much depends on the construction of the cable.

You can measure it by dunking the cable and using your multimeter capacitance range.