Basalt fibre-reinforced polymer (BFRP) bars are notable for their high strength-to-weight ratio, corrosion resistance, and environmental sustainability, making them a viable alternative to traditional steel reinforcements. The bond performance of BFRP bars in concrete is essential for the longevity and safety of marine infrastructure, especially under extreme conditions like chemical and moisture exposure, freeze-thaw cycles and high temperatures. For example, 80-90% bond strength reductions have been reported for FRP bars at 300°C, compared to only 38% for steel. This review summarises recent advancements in understanding how these environmental factors affect the bond behaviour of BFRP bars. The findings reveal the impact of environmental stresses on the mechanical properties of BFRP bars, deterioration mechanisms at the bar-concrete interface, and the effectiveness of mitigation strategies. The paper also highlights the need for further research into the long-term behaviour of BFRP-reinforced concrete structures.