Ko Yao Yai

Island Large Phang Nga island with traditional villages and mangroves

Large island in Phang Nga Bay between Phuket and Krabi, Ko Yao Yai offers rubber-plantation landscapes, fishing villages, low-key beaches and sea kayaking; visitors use it as a quieter base for island-hopping, snorkeling and watching limestone karsts across the bay.

Ko Yao Yai is the larger of the two main islands in the Ko Yao archipelago in Phang Nga Bay, southern Thailand. It is known for a rural landscape of small villages, rubber and rice farming, and stretches of shoreline with mangroves and beaches.

The island attracts visitors seeking a quieter experience than Phuket or Krabi - activities focus on beach walking, kayaking through mangroves, cycling between villages, and community-based tourism. There are small resorts and guesthouses rather than large-scale hotels, and local seafood and village markets are common attractions.

Local communities on Ko Yao Yai have long relied on fishing and agriculture; tourism development has been gradual and community-oriented. The island offers a low-density alternative for visitors to the Andaman coast who prefer less commercialized settings.

Geographically, Ko Yao Yai sits in Phang Nga Bay between Phuket and Krabi in Phang Nga Province and is reachable by short ferry or longtail-boat services from both provinces.

  • Access: Most visitors travel by regular longtail boat or scheduled ferry from Phuket, Krabi or the nearby mainland piers in Phang Nga province.
  • Character: The island is quieter than nearby Phuket and Krabi, making it suitable for low‑impact tourism such as kayaking, cycling and village homestays.
Ko Yao Yai
Ko Yao Yai, Phang Nga Province, Thailand
8.0020, 98.5690
Open 24 hours
Free (public island)

How to Get to Ko Yao Yai #

Ko Yao Yai (Phang Nga/Phuket area) is served by regular ferries and longtail boats from Phuket and Krabi. Common departure points on the Phuket side include Bang Rong or Ao Po piers; from Krabi departures are available from Ao Nang/nearby piers. Reach the chosen pier by taxi or local transfer from Phuket Town or Phuket International Airport, then take the scheduled ferry/longtail to Ko Yao Yai - landings are at small jetties with only a short walk to accommodations.

Tips for Visiting Ko Yao Yai #

  • Take a scheduled ferry from Phuket's Bang Rong or from the Phang Nga side early in the morning to secure scooter or bike rentals before they sell out and to avoid the late afternoon return rush.
  • Head inland to the island's small markets and coastal villages rather than staying only on the main resort strip - travelers often miss the local markets selling fresh seafood and the panoramic views from the east coast.
  • If you want quieter beaches, stay on the north or eastern shores overnight; most day trips concentrate on the western side, so an overnight gives you long stretches of beach largely to yourself.

Best Time to Visit Ko Yao Yai #

The best time to visit Ko Yao Yai is in the dry season (November-April) for the most pleasant weather and smoother sea travel.

Dry season (best time)
Nov-Apr · 24-33°C
Sunny, warm conditions and calmer seas - ideal for beaches, kayaking and reliable boat transfers.
Monsoon / wet season
May-Oct · 24-31°C
Increased rainfall and rougher sea conditions; some boats and water activities may be limited.

Weather & Climate near Ko Yao Yai #

Climate

Ko Yao Yai'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 (2190 mm/year), wettest in September with a pronounced dry season.

Air Quality: AQI 52 Moderate
Best Time to Visit
JanuaryFebruaryMarch
Temperature & Rainfall
Temperature Range
35°
Warmest Month
21°
Coldest Month
Monthly Conditions

January

January is hot, feeling like 30°C with oppressive humidity. Moderate rainfall (30 mm) and partly cloudy skies.

79 Very Good

Comfort

31°
Feels Like Hot
27°C
Temperature
22° 32°
85%
Humidity
Very Humid

Weather

30 mm
Rainfall
2.3 m/s
Wind
Calm
1.9
UV Index
Very High
11.6h daylight

February

February is hot, feeling like 32°C with oppressive humidity. Moderate rainfall (46 mm).

79 Very Good

Comfort

32°
Feels Like Hot
28°C
Temperature
23° 33°
81%
Humidity
Very Humid

Weather

46 mm
Rainfall
1.9 m/s
Wind
Calm
2.3
UV Index
Extreme
11.7h daylight

March

March is hot, feeling like 33°C due to high humidity. Moderate rainfall (59 mm) and partly cloudy skies.

77 Very Good

Comfort

33°
Feels Like Hot
28°C
Temperature
23° 33°
78%
Humidity
Very Humid

Weather

59 mm
Rainfall
1.6 m/s
Wind
Calm
2.4
UV Index
Extreme
12.0h daylight

April

April is the hottest month, feeling like 34°C due to high humidity. Significant rainfall (139 mm) and mostly overcast skies.

59 Acceptable

Comfort

34°
Feels Like Hot
29°C
Temperature
24° 33°
80%
Humidity
Very Humid

Weather

139 mm
Rainfall
1.8 m/s
Wind
Calm
2.4
UV Index
Extreme
12.2h daylight

May

May is hot, feeling like 33°C with oppressive humidity. Heavy rain (217 mm) and mostly overcast skies.

53 Acceptable

Comfort

33°
Feels Like Hot
28°C
Temperature
24° 32°
84%
Humidity
Very Humid

Weather

217 mm
Rainfall
2.3 m/s
Wind
Calm
2.0
UV Index
Extreme
12.4h daylight

June

June is hot, feeling like 33°C with oppressive humidity. Heavy rain (213 mm) and mostly overcast skies.

55 Acceptable

Comfort

33°
Feels Like Hot
28°C
Temperature
24° 31°
86%
Humidity
Very Humid

Weather

213 mm
Rainfall
2.7 m/s
Wind
Calm
1.9
UV Index
Very High
12.5h daylight

July

July is hot, feeling like 32°C with oppressive humidity. Heavy rain (241 mm) and mostly overcast skies.

55 Acceptable

Comfort

32°
Feels Like Hot
28°C
Temperature
24° 31°
86%
Humidity
Very Humid

Weather

241 mm
Rainfall
2.8 m/s
Wind
Calm
1.9
UV Index
Very High
12.4h daylight

August

August is hot, feeling like 32°C with oppressive humidity. Heavy rain (322 mm) and mostly overcast skies.

56 Acceptable

Comfort

32°
Feels Like Hot
27°C
Temperature
24° 31°
86%
Humidity
Very Humid

Weather

322 mm
Rainfall
3.0 m/s
Wind
Light Breeze
2.0
UV Index
Extreme
12.3h daylight

September

September is hot, feeling like 31°C with oppressive humidity. The wettest month with heavy rain (360 mm) and mostly overcast skies.

55 Acceptable

Comfort

31°
Feels Like Hot
27°C
Temperature
23° 31°
87%
Humidity
Very Humid

Weather

360 mm
Rainfall
2.4 m/s
Wind
Calm
2.0
UV Index
Very High
12.1h daylight

October

October is warm with stifling humidity (dew point 24°C). Heavy rain (315 mm) and mostly overcast skies.

55 Acceptable

Comfort

27°
Feels Like Warm
27°C
Temperature
23° 31°
87%
Humidity
Very Humid

Weather

315 mm
Rainfall
1.8 m/s
Wind
Calm
1.9
UV Index
Very High
11.8h daylight

November

November is warm with stifling humidity (dew point 24°C). Significant rainfall (192 mm) and mostly overcast skies.

67 Good

Comfort

27°
Feels Like Warm
27°C
Temperature
23° 30°
87%
Humidity
Very Humid

Weather

192 mm
Rainfall
1.8 m/s
Wind
Calm
1.8
UV Index
Very High
11.6h daylight

December

December is warm with muggy conditions (dew point 24°C). Moderate rainfall (56 mm) and mostly overcast skies.

69 Good

Comfort

27°
Feels Like Warm
27°C
Temperature
23° 31°
87%
Humidity
Very Humid

Weather

56 mm
Rainfall
2.3 m/s
Wind
Calm
1.7
UV Index
Very High
11.5h daylight

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