So what happened in that week to drive such a significant shift in the beach. The following plots are sourced from the Cefas Wavenet website (for waves) and the National Tide and Sea-Level Facility (for tides). The 8-Nov was the maximum stage of the spring tide at Harwich which moved into neap tide on the 15-Nov. There was a positive surge of around 25 cm on the spring tide, which also coincided with elevated wave energy levels throughout the 6-9 Nov (average of 2.3 m wave height and 6-7 s period at West Gabbard buoy and 1.2 m and 4-5 s respectively at Felixstowe). The offshore wave direction (West Gabbard) was firmly from the south-southwest (190-200ºN), and southerly at Felixstowe. As the week progressed, moving into the neap tides, wave energy levels dropped significantly around the 12-Nov before increasing again on the 15-Nov. These few days of lower energy waves also saw a swing to a more east-southeasterly direction.