We love the Gulf coast, but honesty first: November is its wettest month. Meanwhile the Andaman side and the north turn glorious — and Loy Krathong lights up the whole country.
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This site is unapologetically a Gulf coast site — Ban Krut, Hua Hin, Chumphon, the Samui archipelago. So take this as the honest advice it is: November is the one month of the year when we would point you to the other side of the peninsula. The north-east monsoon is now fully parked over the Gulf, and November is the wettest month of the year for Samui, Tao and Phangan, with day-long rain possible and ferries occasionally cancelled in the roughest spells. Ban Krut and the mainland coast catch the same system.
Meanwhile the rest of Thailand is turning glorious. The Andaman coast — Phuket, Khao Lak, Krabi, Lanta — is entering its finest stretch: dry, clear and not yet at peak-season crush. Chiang Mai and the north are cool, golden and at their absolute best. And wherever you are on the November full moon, Loy Krathong is one of Thailand's most magical nights: candlelit banana-leaf floats on every river, canal and beach in the country.
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The Gulf coast is in the thick of it. Samui, Tao and Phangan see their heaviest rain of the year — some years it is merely showery, others it pours for days and the seas turn properly rough. Diving visibility off Koh Tao drops, and boat schedules become weather-dependent. Ban Krut, Prachuap and Chumphon share the pattern in milder form: wet, moody, quiet, with the rain typically easing as the month closes.
Cross the peninsula and the picture inverts. The Andaman side is dry, the seas have settled, and island trips out of Phuket and Krabi are running at full tilt in near-perfect conditions. Bangkok is drying and cooling into its most pleasant weeks, and the north is spectacular — clear skies, cool mornings and green mountains. If November is your only window, that is where your beach days belong.

If you are set on the Gulf coast anyway — and there is a wet-season charm to it — come with the right expectations: storm-watching from a covered terrace, massage days, night markets between showers and dramatic skies over an empty beach. Rates are the lowest of the year and cancellations are usually easy. Just do not build a snorkelling itinerary around the Gulf islands this month.
Whatever else you plan, be somewhere good for Loy Krathong, the festival of lights on November's full moon. Locals float candlelit krathong on rivers and along beaches to let go of the old year's misfortunes; in Chiang Mai it merges with Yi Peng and thousands of lanterns rise over the old city. On the coast it is smaller and lovelier — a beach dinner, lanterns on the sand, and tiny flames drifting out over dark water.

If beach weather is the point of your trip, yes — November is the monsoon peak for Samui, Tao and Phangan, with the heaviest rain of the year and occasional cancelled ferries. The Andaman islands are the better bet this month.
The Andaman coast (Phuket, Khao Lak, Krabi, Koh Lanta) and northern Thailand (Chiang Mai, Chiang Rai, Pai). Both enter their finest, driest stretch in November, before the December crowds arrive.
On the full moon of the twelfth Thai lunar month, which almost always falls in November. Every river, canal and beach in the country fills with candlelit floats; Chiang Mai adds the famous Yi Peng sky lanterns.
Only if you enjoy the moody, quiet side of the coast — expect rain, big skies, empty beaches and rock-bottom rates. For classic beach weather, wait until mid-December, when Ban Krut's best months begin.
More guides for this stretch of the Gulf coast.