We assessed the feasibility of continuous sweat lactate （sLA） measurements in a swimming pool setting. We evaluated （1） the temporal correlation between heart rate （HR） and sLA during regular training, and （2） the correlation and agreement between sLA and blood lactate （bLA） obtained during a lactate curve test. We used the sweat lactate threshold （sLT） and blood lactate threshold （bLT） as threshold metrics. Key findings were as follows: （a） sufficient warm-up to induce perspiration appears prerequisite to assessment; （b） although stage-wise increases were inconsistently observed in the curve test, multiple comparisons did not reveal statistical significance; and （c） Bland–Altman analysis （difference ＝ bLT-speed–sLT-speed） showed a negative mean difference with wide limits of agreement （LoA）, indicating that sLT-based threshold speed tended to be higher （i.e., faster） than bLT-based speed. These preliminary results suggest promise for sLA-based threshold estimation under intermittent swimming protocols, while underscoring the need for larger samples, repeated measures, and protocol standardization.