Tidal flats have the periodic characteristic of repeated inundation and exposure according to tidal forces, and it is important to understand the resulting physical effects and temperature variation properties of sediment. Typhoons are extreme weather phenomena, and their physical effects on coastal and estuary areas differ depending on spatial and temporal differences. Harsh weather conditions caused by typhoons often make timely sampling challenging, so we measured them using temperature and pressure sensors in tidal flats. As a result of temperature sensor data and meteorological factors analysis due to the passage of typhoon, sediment temperature drops caused by Khanun-induced in the summer were larger than those caused by Hinnamnor-induced. Additionally, the temperature variability of the upper and lower flats was dependent on the difference in exposure time caused by tidal levels. This suggests that the impact on the lower flat is relatively moderated due to the buffering effect of inundation caused by tide levels. Overall, sediment temperatures were temporarily affected by the timing of typhoon inflow, but it seems the exposure differences according to tide levels were greater.