Koh Sdach

Island

Koh Sdach, a Cambodian island, functions as a fishing village and gateway to snorkeling and diving; travelers arrive by boat for basic guesthouses, seafood and local island life.

Koh Sdach BattambangChbar MonSihanoukvilleKhemarak PhouminKoh KongNorryPhnom AuralKoh RongKoh Sdach

Koh Sdach essentials

Address: Koh Sdach (Koh Sdach Archipelago), Koh Kong Province, Cambodia
Admission: Free (island)
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About Koh Sdach

Overview

A small inhabited island in the Koh Sdach archipelago off Cambodia’s southwest coast, known for a quiet fishing village atmosphere and local marine life. The island is part of a larger group of islands popular with low-key tourism.

What visitors find

A modest village community with simple guesthouses, local seafood and nearby snorkel sites over reefs and seagrass. Activities are typically limited to swimming, snorkeling, fishing and relaxation rather than large-scale tourism infrastructure.

History

Long used by local fishing communities; tourism development has been gradual and on a small scale compared with larger Cambodian islands.

Location

Sits offshore in the Gulf of Thailand within Koh Kong province maritime waters, accessible by boat from mainland departure points.

  • Marine activities: Forms part of a small archipelago off Cambodia’s west coast with shallow reefs and fringing habitats suitable for snorkeling and small-scale fishing.

Exploring Koh Sdach

Home to just a few hundred people of Cambodian, Thai and Vietnamese descent, Koh Sdach is a low-key getaway with good snorkelling, fishing and a handful of pleasant beaches. A waterfront resort, a fish market and a few restaurants cluster around the main town where the boats come in, and the whole island can be crossed on foot in under an hour.

The surrounding waters teem with fish, and boat trips run to the best snorkelling and fishing spots. Ferries connect the island with both Koh Kong town and Sihanoukville to the south; it lies just offshore from Botum Sakor National Park, in a remote corner of the province.

Tips for Visiting Koh Sdach

  • Reach the island by booking a boat from the nearest coastal piers (services commonly run from Sihanoukville or nearby mainland points); confirm return times with the boat operator before you go.
  • Plan snorkeling or swimming on calm mornings or early afternoons when winds are light and visibility is best; the island offers basic guesthouses and local eateries - book accommodation in advance on busy weekends.
  • Avoid travel during the southwest monsoon (roughly May-October) when sea conditions can be choppy and some boat services are suspended.
When to Go

Best Time to Visit Koh Sdach

For best snorkeling and calm seas, visit during the dry season (November-April) when weather and sea conditions are most favorable.

Dry season
November-April · 25-32°C
Calm seas and clearer weather make snorkeling, diving and boat transfers more reliable and enjoyable.
Rainy season
May-October · 24-30°C
More frequent rain and rougher seas can disrupt boat travel and reduce water clarity, though the landscape is greener and there are fewer visitors.

Weather & Climate near Koh Sdach

Climate

Koh Sdach's climate is classified as Tropical Monsoon - Tropical Monsoon climate with consistently warm temperatures year-round. Temperatures range from 22°C to 33°C. Heavy rainfall (3287 mm/year), wettest in July with a pronounced dry season.

Air Quality: AQI 57 Moderate
Best Time to Visit
JanuaryDecemberFebruary
Temperature & Rainfall
Temperature Range
34°
Warmest Month
20°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Ideal 22° - 30° 26° 11 mm partly cloudy 77% 2.8 m/s 2.0 very high 11.5h
February Excellent 23° - 31° 27° 27 mm some cloud 77% 2.7 m/s 2.2 extreme 11.7h
March Very Good 24° - 33° 32° 71 mm partly cloudy 78% 2.2 m/s 2.4 extreme 12.0h
April Good 25° - 33° 35° 103 mm partly cloudy 78% 2.2 m/s 2.4 extreme 12.3h
May Acceptable 25° - 32° 34° 342 mm overcast 82% 2.2 m/s 2.1 extreme 12.5h
June Acceptable 24° - 31° 32° 576 mm overcast 84% 2.8 m/s 2.0 very high 12.6h
July Acceptable 24° - 31° 32° 692 mm overcast 85% 2.4 m/s 1.9 very high 12.6h
August Good 24° - 30° 31° 579 mm overcast 85% 2.8 m/s 2.0 very high 12.3h
September Good 24° - 30° 30° 484 mm overcast 86% 2.2 m/s 1.9 very high 12.1h
October Good 24° - 30° 30° 278 mm overcast 84% 1.9 m/s 2.0 very high 11.8h
November Very Good 23° - 30° 27° 99 mm partly cloudy 81% 2.8 m/s 2.0 very high 11.5h
December Excellent 22° - 30° 26° 25 mm partly cloudy 78% 3.2 m/s 1.9 very high 11.4h