Trat sits at the far southeastern edge of Thailand, a laid-back province where fruit orchards stretch toward the Cambodian border and over 50 islands dot the Gulf of Thailand just offshore. Most travelers know it as the gateway to Koh Chang, Koh Kood, and Koh Mak, three islands with white sand beaches, jungle waterfalls, and some of the clearest water in the country. But the province itself rewards a slower look: a charming old town with wooden shophouses, night markets overflowing with grilled cuttlefish and crab noodles, mangrove forests you can explore by kayak, and a food culture built on seafood so fresh it was swimming that morning.
Your best window for visiting Trat is early December through late January, when skies are driest, humidity drops to its lowest, and the islands' turquoise water is at its clearest for snorkeling and diving. Rain is nearly absent in December, with only about a 3% chance of a wet day, climbing slightly to 9% in January. This is also the coolest stretch of the year in relative terms, making island hopping and jungle hikes more comfortable. The main trade-off is that December draws higher visitor numbers, so booking ferries and island accommodation early is wise. If you'd rather time your trip around Trat's famous fruit season and the annual Fruit Fair in mid-May, spring offers a strong secondary window with thinner crowds and accommodation deals, though afternoon showers begin building by late April.
Spring in Trat, Thailand
Spring is when Trat's agricultural character takes center stage. The province is one of Thailand's top fruit-growing regions, and markets from March through May overflow with durian, rambutan, mangosteen, and the local star, salacca (rakam), a sweet-and-sour fruit that turns up in everything from soups to desserts. The annual Trat Fruit Fair, typically held in mid-May around Trat City Hall, celebrates this harvest with colorful parades, fruit contests, and farm visits. Highs average 90.6°F (32.6°C), and afternoons feel genuinely hot, so plan market visits and old-town walks for the morning hours.
Overnight lows of 75.9°F (24.4°C) offer little relief from the warmth, and humidity climbs steadily through the season. Rain is still manageable in March, with roughly a 21% chance of a wet day, but by May that jumps to over 50%. The Songkran water festival in mid-April is celebrated throughout Trat, a welcome excuse to get thoroughly soaked when temperatures are at their most intense. Late April brings the year's peak heat, with highs reaching 91.6°F (33.1°C) and lows of 76.4°F (24.7°C).
Tourism is fairly slow during spring, and accommodation deals are common, making it a smart window for budget travelers who don't mind the heat. Island ferries run regularly, and the water is still clear enough for decent snorkeling around Koh Chang and Koh Kood. Pack breathable clothing, strong sunscreen, and a light rain jacket for those late-afternoon showers that start rolling in by May.
Summer in Trat, Thailand
Summer brings the full force of Trat's monsoon season. Rain chances hover around 62% each month from June through August, and when it comes, it often arrives as heavy afternoon downpours rather than all-day drizzle. The upside is that mornings frequently start with sunshine, giving you windows for beach time or exploring the mangrove forests at Ban Tha Ranae, where you can kayak through ancient Xylocarpus tree root systems. Highs average 88.1°F (31.2°C), slightly lower than spring thanks to cloud cover, but the humidity is relentless, staying above 80% throughout the season.
Despite the rain, summer is paradoxically the busiest time in Trat, driven largely by Thai school holidays. July sees the highest visitor numbers of the year, and Koh Chang's west coast beaches fill up with domestic tourists. Accommodation prices rise accordingly. Expect occasional rough seas that can disrupt ferry schedules to the smaller islands like Koh Kood and Koh Mak, so build flexibility into your itinerary. Diving visibility drops compared to the dry months, though the reef life around Koh Rang remains active.
Lows average 76.3°F (24.6°C), so evenings stay warm and sticky. The fruit season continues through June and into early July, with durian still plentiful in the mainland markets. If you visit during this window, spend time exploring Trat town's night market, where vendors grill cuttlefish over charcoal and serve crab-egg chili paste with fresh herbs. Waterproof bags for your electronics and quick-dry clothing are essentials for summer travel here.
Fall in Trat, Thailand
Fall is Trat's wettest season, with September holding the highest rain probability of any month at 69%. Seas can be choppy, and some island accommodations on smaller islands like Koh Wai and Koh Kham scale back operations or close entirely. If you're set on visiting during these months, Koh Chang remains accessible year-round and its jungle trails, including the path to Khlong Phlu Waterfall, are at their most lush and dramatic when fed by monsoon rains. Highs average 89.2°F (31.8°C), and the air feels thick, with humidity peaking near 86% in September.
By late October, rain begins easing to around 53%, and November drops sharply to 20%, signaling the transition to dry season. Loi Krathong, Thailand's festival of lights, falls in November and is celebrated across Trat with floating lanterns and candle-lit krathongs released onto rivers and the sea. It's a beautiful cultural moment worth timing a visit around. Lows cool to 73.9°F (23.3°C), the lowest seasonal average outside of winter, and evenings by the water carry a welcome breeze.
Tourism remains the second busiest of the year, with accommodation prices slightly higher than average. The Bang Bao Fishing Village on Koh Chang's southern tip stays open through the season and offers boat trips and fresh seafood even on rainy days. Pack a sturdy rain jacket and reef-safe sandals that handle wet terrain well.
Winter in Trat, Thailand
Winter is Trat at its best. December brings an almost negligible 3% chance of rain, and January follows at just 9%, making this the window when the islands truly shine. The water around Koh Kood and Koh Mak reaches its clearest, ideal for snorkeling and scuba diving along the coral reefs of Mu Ko Chang National Park. Highs average 89.6°F (32°C), warm but paired with the year's lowest humidity levels, starting around 64% in January and December, which makes the heat far more bearable than the monsoon months.
One consideration for January and February is air quality: haze from agricultural burning across the region can push conditions into the Unhealthy for Sensitive Groups range, particularly in January. If you have respiratory sensitivities, check conditions before committing to strenuous jungle hikes on Koh Chang. That said, coastal breezes on the islands typically keep the air fresher than on the mainland. Lows dip to 70.2°F (21.2°C), the coolest nights you'll find in Trat, pleasant enough to sleep without air conditioning if your accommodation has good airflow.
December draws the year's second-highest visitor numbers, but February is actually Trat's quietest month, offering empty beaches and lower prices. The old town in Trat itself is worth a full day: wander the traditional wooden shophouse lanes, visit the Trat Museum to learn about the province's history of Chinese trade and French colonial occupation, then end at the night market with a plate of fried rice loaded with mantis shrimp and cuttlefish. For the islands, book ferry tickets and accommodation a few weeks ahead for the December holiday period, and bring a light layer for cooler evening boat rides.
At a Glance
Monthly weather, visitor crowds, air quality, holidays, and daylight hours to help you plan your trip.
Travel Tips & Safety for Trat, Thailand
Getting to Trat from Bangkok takes about five hours by bus from the Eastern Bus Terminal (Ekamai), or you can fly with Bangkok Airways to Trat Airport for a much quicker transfer. From Trat, ferries to Koh Chang depart from piers near Laem Ngop and take roughly 30 to 45 minutes. Koh Kood and Koh Mak require longer ferry or catamaran trips from Laem Sok Pier. Renting a motorbike is the most practical way to explore the islands, though roads on Koh Chang can be steep and winding, so ride cautiously if you're not experienced.
Trat is generally very safe for travelers. Use common sense with valuables at busy markets and ferry piers, and avoid raw seafood from street vendors unless you have a strong stomach. Stay hydrated in the tropical heat, wear reef-safe sunscreen on the islands, and take jellyfish warnings seriously during the monsoon months. If you plan to ride a motorbike, wear a helmet at all times, as enforcement is inconsistent but the winding coastal roads demand it.