This systematic review of blue space interventions (BSIs) found evidence suggesting potential benefits for mental health and psychosocial wellbeing, particularly in the short term. However, the studies were methodologically limited by small sample sizes, heterogeneous interventions, and short-term follow-up, making it difficult to draw definitive conclusions about the effectiveness of BSIs.

This study is part of the NEAR Health project, funded by the Environmental Protection Agency (EPA) and the Health Service Executive. No other conflicts identified.

This review synthesizes a diverse body of literature on blue space interventions, highlighting promising findings for mental wellbeing. However, methodological limitations such as small sample sizes, varied interventions, and short-term follow-up prevent stronger conclusions. The lack of detailed environmental context and limited use of validated measures further restricts the generalizability of the results.