An experiment was conducted to determine the seasonal water requirement of pepper, the crop coefficient under full water requirement as well the effect of deficit irrigation on pepper growth and development under a rain shelter. The treatments imposed were T1, application of 100% crop water requirement, T2, was 80%, T3 60% and T4 40 % of crop water requirement. It was determined that pepper requires about 526.7 mm of water over the growth season. The crop coefficient under full water supply was found to be: 0.43, 0.75, 1.37 and 0.94 for initial, development, mid-season and the late season stages respectively. It was also found out that a water deficit of 20% lead to growth and development that was not significantly different from pepper production under full water requirement.