Researchers all over the world have contributed various scientific studies to understand coastal aquifers characteristics and to study sea water intrusions phenomenon. While evaluating the impact of sea water on ground water system near the coast some pertinent points haunt the scientific community. In this technical contribution authors has raised some burning issues and points. Though, such issues and dilemmas were emerged in the analysis and discussions in past but the error and its magnitude, reliability of analyzed data, volume and source of authenticity of input field data, practical acceptance of solutions suggested etc. are some points that need introspection. Precise and better scientific analysis and solutions may be thought for future research directions and focus can be made on some of the points and issues raised. Based on interdisciplinary approaches accuracy in “evaluation plan and procedure” can be achieved scientifically and the challenges of uncertainty of sea- water intrusion assessment can be dealt in totality. Predictions required should be done in a realistic timeframe in respect of any particular geological domain, country or specific area. In brief, this original and must to read article encompasses technical material for the entire scientific community.