Uljin faces the East Sea on South Korea's northeast coast and offers a compact set of reef and wreck sites suited to beginner and intermediate divers. The five sites in our database include natural reef, artificial reef structures, and two wrecks, the Buk-myeon Wreck and the Nagok Wreck, all lying within a moderate depth range. The Flower Garden site stands out for its notably high visibility compared to the other sites, alongside a sharp drop-off to deeper water. Temperate species found here include conger eel, common octopus, catshark, slipper lobster, and monkfish. Water temperatures are coolest in late winter and warmest in September.
Monthly water temperature across Uljin's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water temperatures in Uljin run cooler than further south, sitting in the low teens through winter and spring before climbing through summer and peaking in September. The July-to-October window offers the warmest conditions; outside this period a drysuit or thick wetsuit is advisable. Visibility varies considerably between sites, ranging from poor to very good depending on conditions.
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Water temperature around Uljin ranges from about 12°C in February to 21°C in September, based on satellite sea-temperature data for its dive sites.
In the warm season (about 21°C) a 5mm suit is comfortable in Uljin; in the coldest months (about 12°C) step up to a 7mm or semi-dry suit.
Fin maps 5 sites in Uljin (5 scuba diving sites).
Across Uljin's dive sites, May, June, July, August, September and October are most often reported as the best months to visit.
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