Puducherry dive sites

Arikamedu was an ancient trading port that served as a key link in the Roman trade network with India during the first and second centuries CE. The site on land has yielded Roman pottery, glass beads, and coins that prove direct trade connections between the Roman Empire and the Chola dynasty coast. Parts of the ancient port infrastructure extend into the sea due to coastal erosion and sea level changes over two millennia. While the underwater archaeology is not as well-documented as the terrestrial excavations, divers can observe submerged stonework and harbour structures alongside the natural reef growth that has colonised these ancient foundations. The site is of interest to both archaeological and recreational divers.

Diving at Arikamedu is best from January to April when the northeast monsoon has passed and the Bay of Bengal settles into its calmest phase. Visibility ranges from five to twelve metres, modest by tropical standards but adequate for the shallow reef and archaeological exploration. Water temperatures are warm year-round, between twenty-five and twenty-nine degrees. The current can be moderate during tidal changes, requiring intermediate-level experience. The maximum depth is around sixteen metres on the outer reef slope. The monsoon season from October to December makes diving impractical due to rough seas and reduced visibility. Some dive centres close entirely during the monsoon months.

Two dive centres in Pondicherry offer regular trips to Arikamedu Reef and surrounding dive sites along the Coromandel coast. Booking in advance is recommended as boats and guides are limited compared to more established Indian dive destinations. The boat ride from Pondicherry's old harbour takes approximately thirty minutes. Certified divers can join guided dives, while beginners are usually directed to shallower sites closer to shore. The archaeological significance of the site means that touching or removing any objects from the seabed is strictly prohibited. Dive centres brief participants on responsible diving practices around archaeological features. Photography is permitted and encouraged.

Pondicherry's dive industry is small but growing. A handful of PADI and SSI centres operate from the town, offering trips to the Temple Reef and surrounding sites. The boat ride to the reef takes about 20 to 30 minutes from the harbour. Equipment standards are generally good at established centres, though the range of rental gear may be limited compared to major dive destinations. Most operators offer beginner courses and guided fun dives. The diving is seasonal, with the best conditions from January through April before the monsoon season begins.

Visibility at Pondicherry is variable and generally lower than Indian Ocean destinations like the Maldives or Andaman Islands. Expect between five and fifteen metres depending on season, tide, and recent weather. The best visibility occurs from February to April when seas are calmest and plankton levels are moderate. After heavy rain or during the monsoon season from October to December, visibility can drop below three metres and diving is often suspended entirely. The Bay of Bengal has higher sediment loads than the Arabian Sea side of India.