Wat Tha Sak, or the Monastery of the Teak Landing, was located off the city island in the southern area of Ayutthaya in the Samphao Lom Sub-district (1).
The monastery was situated along the present Chao Phraya River, the Lopburi River in the Ayutthaya era (2), between Wat Yi Kham and Wat Chi Thammo.
On a Fine Arts Department map drafted in 1974 CE, a canal is indicated between Wat Yi Kham and Wat Tha Sak, leading from the Chao Phraya River south towards Wat Phraya Kong.
Wat Tha Sak is today not much more than a mound of broken bricks and tiles covered in vegetation. An unpaved path curves around the low hill. The mound covers probably the foundations of the former preaching hall.
The monastery's historical background and period of construction are unknown.
The site is indicated on a 19th-century map and Phraya Boran Ratchathanin's map drafted in 1926 CE. Phraya Boran (1871-1936 CE) was the Superintendent Commissioner of Monthon Ayutthaya from 1925 to 1929 CE but occupied important functions since 1896 CE in Monthon Ayutthaya.
Based on the 2007 CE Fine Arts Department map, the site is in geographical coordinates: 14° 20' 42.06" N, 100° 34' 5.05" E.