Swimming conditions at Teuri Beach vary by season. Summer months (July-August) offer the calmest waters, though Hokkaido's ocean temperatures remain quite cold even then. The beach is relatively sheltered, but currents can be unpredictable around island coastlines. There are no lifeguards on duty, so swim at your own risk. The beach is more popular for scenic walks and wildlife watching than swimming. Always check local weather conditions before entering the water, and be mindful that medical facilities on this small island are limited.

Late May through August offers the best weather for visiting Teuri Beach, with temperatures ranging from 15-20°C. Summer (July-August) provides the warmest conditions and calmest seas. However, Teuri Island is renowned for seabird watching, particularly puffins, making May to July peak season for wildlife enthusiasts. The island experiences harsh winters with heavy snow and rough seas from November to March, when ferry services may be limited. Spring and early autumn offer fewer crowds while still providing pleasant conditions for beach walks and photography.

Reaching Teuri Beach requires taking a ferry from Haboro Port on mainland Hokkaido. The Heartland Ferry operates daily (weather permitting), with the journey taking approximately 90 minutes. Ferries run 1-2 times daily depending on season. Once on Teuri Island, the beach is accessible by rental bicycle, local minibus, or on foot from the ferry terminal. Parking is available near Haboro Port on the mainland for those driving there. The island itself is small and mostly car-free, making bikes the preferred transportation method.

Teuri Island has limited but adequate facilities. Several minshuku (Japanese-style guesthouses) and small hotels offer accommodation, mostly concentrated near the ferry terminal. Many lodgings include meals featuring fresh local seafood, which is recommended since dining options are scarce. A few small restaurants and shops operate during tourist season, but choices are limited. It's advisable to book accommodation in advance, especially during seabird watching season (May-July). Some visitors prefer day trips from Haboro, though staying overnight allows you to experience the island's tranquil atmosphere fully.

While Teuri Beach itself isn't the primary seabird viewing location, the island is one of Japan's best spots for observing puffins and other seabirds. Rhinoceros auklets and spectacled guillemots nest in the coastal cliffs, best viewed from designated observation points rather than the beach itself. The main breeding colonies are along the island's western cliffs, accessible via walking trails. Peak viewing is dawn and dusk during May through July. Guided boat tours around the island offer closer views of nesting sites and are highly recommended for serious birdwatchers.