The development of the UASea toolbox is part of Ph.D. research in marine Remote Sensing. UASea is a toolbox that identifies the optimal flight times in a given day for an efficient UAS survey and the acquisition of reliable aerial imagery in the coastal environment. The suggestions are derived using weather forecast data and adaptive thresholds in a ruleset. The parameters that have been proven to affect the quality of UAS imagery and flight safety have been used as variables in the ruleset. The proposed thresholds are used to exclude inconsistent and outlier values that may affect the quality of the acquired images and the safety of the survey. Considering the above, the ruleset is designed in such a way that outlines the optimal weather conditions, suitable for reliable and accurate data acquisition as well as for efficient short-range flight scheduling.