Fibre reinforced polymer laminated composites nowadays are being used in various applications from aerospace, military, civil, and marine. Composite material can be used not only for structural applications, but also in electrical, thermal and various other applications. FRP materials are used in various engineering applications because of their superior performance and tailor made properties. Wide-spread use of fibre-reinforced polymers (FRP) though is hampered due to lack of long-term durability and performance data, especially in a tropical environment. The main environmental factors for the degradation of GFRP are temperature, water/ moisture, alkalinity and load. Hence Effort is required to fully comprehend the GFRP composite response under natural and accelerated moisture and temperature conditions specific to tropical region. The aim of the current research is to present the variation of mechanical properties of glass fibre/ epoxy composite under the effect of temperature, alkalinity and rate of loading. For achieving this objective an experimental setup was prepared. The aim of the experiment was to study the combined effect of chosen parameters moisture, alkali (saline), temperature and loading to study the magnitude of damage of GFRP composites. The microscopic and microscopic behaviour of the GFRP composite specimen and pure epoxy and Nano clay epoxy composites exposed to varifying hygrothermal loads has also been analysed.