When is the best time for diving on Koh Tao?

Roughly March to September, when seas are calm and visibility at its best. Diving runs year-round, but October to December brings wind, rain and reduced visibility.

When is the rainy season on Koh Tao?

October to December, peaking in November. Like the rest of the Gulf, Koh Tao stays largely dry through the European summer months.

Can ferries to Koh Tao be cancelled?

Yes — in the November–December monsoon, rough seas occasionally halt crossings from Chumphon and Surat Thani for a day or two. Build slack into travel plans in those months.

When can you see whale sharks at Koh Tao?

Sightings happen year-round and are never guaranteed. Many divers report clusters of sightings in the settled months around March–May and again around September–October.

Best Time to Visit Koh Lipe: The Season That Closes

The island with a real closed season

Most Thai islands quieten down in the monsoon. Koh Lipe closes. From roughly mid-May to mid-October the majority of its resorts, restaurants and dive shops shut for the season, and the ferry service from the mainland is cut back sharply or stops altogether.

Clear shallow water over reef in the marine park

The reason is simple: Lipe is small, far south, and everything on it comes by boat across open water. When the south-west monsoon puts swell into that crossing, the supply line and the guests both stop. If you are planning a trip outside November to April, check that both your hotel and a boat actually exist on your dates.

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In short

Koh Lipe seasons

November–April: the season — everything open, calm clear sea
Mid-May–mid-October: most of the island closed, boats reduced
Best value: November and late April
Busiest and dearest: Christmas to mid-January
Day trips and snorkelling are at their best from December to March

The season, month by month

November is when the island wakes up: everything reopens, the sea flattens, and prices sit below the peak. December to February is the height of the season — the most reliable weather, the clearest water, and rooms that need booking well ahead over Christmas and New Year.

March and April stay dry and calm but get properly hot, with April the hottest month of the year. Late April is the last good window before the island starts winding down again, and it is often the best value of the whole season.

Good to know

Planning around the weather

Outside November to April, confirm both your hotel and the boat before you book flights.
Water visibility for snorkelling is best from December to March.
Songkran in mid-April is a country-wide water fight; expect to get soaked.
The crossing from Pak Bara is open water — take something for seasickness if you are prone.

What the season gives you

Koh Lipe's draw is the water. It sits inside a national marine park with reef close enough to swim to from the sand, and in the dry months the visibility is as good as anywhere in Thailand. Day trips to the surrounding islands run every morning and the sea is flat enough for the small boats.

That is exactly what the monsoon takes away. Even at the edges of the season, in May or October, the snorkelling trips become weather-dependent and the crossing from Pak Bara can be uncomfortable. The narrow season is the price of a small island in clear water.

Month by month

January	Dry, clear and calm — peak season
February	The best month for water clarity, busy and dear
March	Hot and dry, excellent snorkelling, still busy
April	Hottest month, Songkran mid-month, season ending
May	The island starts closing, boats reduced
June	Monsoon, most places shut
July	Closed season, very few boats
August	Closed season, rough crossing
September	The quietest month — almost nothing open
October	The island starts reopening late in the month
November	Everything open again, calm sea — best value
December	Dry and clear, prices climb towards Christmas

Frequently asked questions

When is the best time to visit Koh Lipe?

November to April. Within that, November and late April give the same calm sea as the peak at noticeably lower prices.

Does Koh Lipe close in low season?

Largely, yes. From about mid-May to mid-October most resorts and restaurants shut and the ferry service is cut right back — more completely than on any other Thai island.

How do you get to Koh Lipe?

By speedboat or ferry from Pak Bara pier in Satun province, about an hour and a half across open water. There are also seasonal boats from Langkawi in Malaysia.

Is the snorkelling good on Koh Lipe?

It is the main reason to come. The island sits inside a national marine park with reef close to shore, and visibility is at its best from December to March.

Best time to visit Koh Lipe