
Cambodia's Coastal Gateway to the Islands

Ream National Park (18km east of Sihanoukville; $5 national park entry; guided boat tour $15–20 per person; departs park entrance 8am) is the finest natural area in southern Cambodia — 150km² of mangrove estuaries, primary tropical forest, and undeveloped coastline. The guided boat tour through the Prek Toek Sap estuary passes dolphin pods, hornbill colonies, and a deserted beach on uninhabited Koh Thmei island.
💡 Arrange the Ream boat tour through your Otres Beach guesthouse or take a tuk-tuk directly to the park entrance (18km east of Sihanoukville; $10 return by tuk-tuk). The 8am morning departure has the best bird activity, flattest water, and clearest light. Combine Ream with your island check-in on the same afternoon for an efficient schedule.

Otres Beach (8km south of the city centre; Grab tuk-tuk $5 from the ferry port) has retained the character the northern city beaches lost after 2016: 2km of white sand, calm swimmable water, and a community of independent guesthouses, hammock bars, and village restaurants. Otres Village (2 minutes walk from the beach) is the best food and social hub in the Sihanoukville area for independent travellers.
💡 Stay at Otres rather than the city centre unless you have a ferry to catch the same afternoon. The guesthouses are significantly better value; the beach is swimmable; and the 20–25-minute journey to the ferry port by Grab ($5) is manageable for morning departures.

Koh Ta Kiev (1.5h by slow boat; $20–30 per person for a combined island day trip including boat, guide, lunch, and snorkel gear) is the most accessible undeveloped island near Sihanoukville — no casino infrastructure, limited electricity, and intact reef snorkelling in less than 3 metres of water. Departures daily from the Sihanoukville Marina. Combined multi-island snorkelling tours also visit the reefs between Koh Ta Kiev and the Koh Rong archipelago.
💡 Book island day trips through Otres Beach guesthouses rather than city centre operators. Otres-based operators use smaller boats, visit better reef spots, and spend more time in the water for the same price. Island conditions are best November–April when the sea is calm.

Serendipity Beach (15 minutes walk from the ferry port) retains a strip of functioning sunset terrace bars from the pre-casino era. The geographic position of Sihanoukville — elevated above a south-facing bay with the offshore islands on the horizon — produces genuinely spectacular silhouette sunsets. Koh Rong and its neighbours are visible 35km offshore, turning dark against the orange sky at 6pm.
💡 Arrive at Serendipity by 5:30pm. A $1.50 Beer Lao on the terrace watching the island silhouettes is the finest free experience in Sihanoukville and unchanged despite everything that has changed around it. The sunset here is as good as it always was.
Eat at Otres Village rather than the city centre. Otres has Cafe Loco (wood-fired pizza; $6–8), a string of guesthouse beach restaurants (fresh seafood grilled to order; $8–15 for a whole fish), and the Saturday Otres Market (local Cambodian food stalls, craft beer, and live music). Beer Lao ($1.50 at any Otres bar) is the standard drink. The city centre restaurant scene is primarily oriented toward Chinese casino visitors, with limited independent dining options for Western travellers. A single exception: Gelato Italiano (Italian-run; near the port; excellent gelato; $2) is worth a detour.
Arrive by bus from Phnom Penh or Kampot. Grab to Ream National Park (18km east; $7; 8am boat tour $15–20; 3h). Return to Sihanoukville by noon. Grab to Otres Beach ($5). Check in. Afternoon swim. Otres Village dinner (Cafe Loco pizza $6–8 or beach seafood grill $8–15).
9am Grab to ferry port ($5; 20 mins). 10am speedboat to Koh Rong ($10; 45 mins) for 1–3 nights. Or: book a combined island snorkelling day trip through your Otres guesthouse ($25–30 including boat, guide, lunch, and snorkel gear; departs 8am; returns 4pm; visits Koh Ta Kiev reef).
From the bus station, take a Grab directly to Otres Beach ($4–5; 8km south; 20 mins).
Speed Ferry Cambodia and GTVC sell Koh Rong tickets at the port for $10 one-way (speedboat; 45 mins) and $8 (slow boat; 2.5h).
Ream (18km east; $15–20 per person; 3h; 8am start) fits neatly into a Sihanoukville morning before checking in to Otres or boarding an afternoon ferry to the islands.
The construction north of the city has affected water quality on Ochheuteal and Independence beaches. Otres (south of the development zone) maintains clean, swimmable water.
Virak Buntham, Capitol, and Giant Ibis run Phnom Penh–Sihanoukville services from 6am ($7–12; 4h).
The Kampot Express shared taxi ($7; 1.5h; door-to-door) is faster and more comfortable than the local bus for the Sihanoukville–Kampot journey.
Fixed-price tuk-tuks in Sihanoukville. Essential for port–Otres transfers and Ream NP.
Free
Download Cambodia offline. GPS works on the islands without data.
Free
Khmer offline pack. English is common at tourist venues but rare elsewhere.
Free
From Angkor’s temples to Koh Rong’s islands.