An increasing number of studies suggest that the cumulative impacts of wind turbine encounters might have a negative impact on the acceptance of onshore wind power development. In many countries offshore wind resources are seen as the new wind energy resource, though the offshore cost of energy is markedly higher compared to onshore. In the present paper it is tested if the cumulative effect of wind turbines makes people favour offshore wind turbine development to onshore development. The results suggest that the cumulative effects from wind turbine encounters have weak effects on the relative attitude towards more onshore and offshore wind power development. This suggests that increasing onshore wind power development does not make people favour offshore wind power development to a higher extent.