Beppu tide times

The Beppu Jigoku (Hells) are nine natural hot spring pools with extreme temperatures (average 98°C) and distinctive appearances caused by their mineral composition. The most famous: Chinoike Jigoku (Blood Pond Hell, red from iron hydroxide), Umi Jigoku (Sea Hell, cobalt blue from minerals), and Tatsumaki Jigoku (Tornado Hell, a geyser erupting every 30 to 40 minutes). Seven of the nine are on a combined entry pass (approximately ¥2,200). They are for viewing only — not bathing. Allow 2 to 3 hours for the circuit.

The Beppu sunayu (sand bath) at Shoumonkai Beach on the harbour is a unique geothermal experience. Bathers wear a yukata (provided), lie in a shallow excavated sand bed, and have 40 to 45°C thermal sand shovelled over them by attendants. Immersion time is 15 to 20 minutes; the deep heat penetrates muscle tissue more effectively than hot spring water bathing. Entry is approximately ¥1,500 including yukata; open daily (check seasonal hours). The experience is best in cooler weather — summer visits are challenging.

Mean spring range at Beppu Bay is approximately 1.8 metres. The bay is relatively enclosed by the Kunisaki Peninsula to the north and the Tsurumi headland to the south, sheltering it from Pacific Ocean swell. The bay's warm water (partially from geothermal groundwater inputs along the coast) supports productive aquaculture and makes the coastal fishing more productive year-round than the open Pacific coast.

By train from Fukuoka (Hakata Station): Limited Express Sonic to Oita, then local train to Beppu — about 2 hours total (¥4,000–¥5,000). Direct Limited Express Sonic from Hakata to Beppu in 1 hour 50 minutes on some services. From Osaka/Kyoto/Tokyo, the night ferry (Sunflower Ferry) from Osaka Nanko to Beppu takes 12 hours and is a comfortable alternative to overnight rail. From Tokyo by shinkansen: Hakata-Oita-Beppu is the standard routing (6+ hours).

Beppu Bay is calm and sheltered — the designated swimming beach at the sand bath area and the harbour beaches are safe for swimming in summer (water temperature 22 to 26°C July through September). The bay has light boat traffic. The unique feature is the slightly elevated water temperature near the shore (from geothermal groundwater seeps along the coastline), which can make the shallows noticeably warmer than the main bay in summer. Jellyfish (primarily Aurelia aurita moon jellies) appear in late summer.