Climate change is increasingly affecting agricultural productivity in Mozambique, particularly maize yields among smallholder farmers. A longitudinal study using farmer surveys and yield data from 50 randomly selected villages across Mozambique. Farmers reported higher yields (up to 20% increase) in climate-resilient varieties compared to conventional ones, with significant adoption rates exceeding 60% among surveyed households. Climate-resilient maize varieties have the potential to enhance agricultural productivity and food security for Mozambican smallholders under changing climatic conditions. Government should provide subsidies and extension services to promote wider adoption of these resilient seeds.