The temple was built around the end of 13th century at the junction Bulkelry street-dock street, hunghom. It was near a gate of the Whampoa dock yard. It is a picture of the temple in the 1920s compared with today's appearance. The temple was rebuilt after the war.
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See https://www.kwuntong.org.hk/en/c1_3.html for details.
Tam Kung (Chinese: 譚公; lit. 'Lord Tam') or Tam Tai Sin (譚大仙) is a sea deity worshiped in Hong Kong and Macau.
There's more information about the temple on the Chinese Temples Committee website.
Ken Raby's book, Hong Kong Temples, says "The main temple complex in Sai Kung built around 1872 is dedicated to Tin Hau and Kwan Kung."
The Ancient Temple of Shang-ti (Shang-ti Ku-miao) was situated on the western side of the present Lomond Road, behind the St. Theresa Hospital . The original temple was near the former Ma-tau-wei Village directly east of the present site. When the villagers were evacuated by the government and the whole village was levelled to construct new roads and buildings in 1927-28, the temple was destroyed and a new temple was constructed at the present site. Later on, the new temple was also demolished but the stone gate was preserved, the name of the temple remaining.
Tin Hau Temple in Repulse Bay with Tin Hau and Kwun Yum statues.