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Phipps Peninsula is a sandy peninsula located near the town of Yakutat, Alaska. In the summer of 2018, a field study was conducted in three areas of the peninsula. All three locations feature complex sediment remobilization processes shaping the local geomorphology. Here, variations in geotechnical properties at the three test sites are investigated. For this purpose, a portable free fall penetrometer (PFFP) was deployed along several transects at the three sites, totaling approximately 750 deployments throughout the course of the study. Since field studies using PFFP on sub-aerial and intertidal beach areas are limited, and results are highly variable, novel methods were implemented for the analysis of the PFFP data. This study represents a first step towards the use of PFFP data to characterize geotechnical properties on sub-aerial and intertidal beaches. Temporal differences in strength are discussed in the context of local physical processes, and spatial variability was related to differences in morphology and hydrodynamics.