Discover the best time of year, based on historical climate, temperature, and precipitation.
The best weather in Rayong is from January, February, December. — consistent weather climate
⛈Hot & rainy
| Score | 86 | 79 | 68 | 59 | 44 | 45 | 36 | 42 | 32 | 35 | 68 | 90 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Climate | Hot & dry | Hot & dry | Hot & dry | Hot & dry | Hot & rainy | Hot & rainy | Hot & rainy | Hot & rainy | Hot & rainy | Hot & rainy | Hot & rainy | Hot & dry |
| Temperature | 23–31°C | 24–31°C | 26–31°C | 27–32°C | 27–31°C | 27–30°C | 26–30°C | 26–30°C | 26–29°C | 24–30°C | 24–31°C | 23–31°C |
| Feels like | 25–34°C | 27–35°C | 31–37°C | 32–38°C | 32–38°C | 32–36°C | 31–35°C | 31–36°C | 30–35°C | 29–36°C | 27–36°C | 24–34°C |
| Precipitation | 21mm 5 days | 47mm 7 days | 62mm 10 days | 89mm 11 days | 174mm 19 days | 180mm 21 days | 264mm 27 days | 221mm 25 days | 317mm 30 days | 296mm 23 days | 103mm 10 days | 21mm 3 days |
| Sunshine | 10.7h ☀︎ 94% | 10.7h ☀︎ 91% | 10.8h ☀︎ 89% | 10.1h ☀︎ 81% | 6.6h ☀︎ 52% | 5.7h ☀︎ 44% | 4.6h ☀︎ 36% | 5.0h ☀︎ 40% | 4.0h ☀︎ 33% | 4.9h ☀︎ 41% | 8.2h ☀︎ 71% | 10.3h ☀︎ 91% |
| Wind | W · 16 km/h | S · 16 km/h | S · 15 km/h | S · 15 km/h | S · 15 km/h | SW · 17 km/h | SW · 17 km/h | SW · 17 km/h | SW · 15 km/h | N · 13 km/h | NE · 15 km/h | N · 17 km/h |
| Humidity (%) | 71% | 75% | 78% | 78% | 81% | 81% | 83% | 83% | 86% | 86% | 77% | 66% |
| Day length | 11.5h | 11.7h | 12.1h | 12.4h | 12.7h | 12.9h | 12.8h | 12.5h | 12.2h | 11.8h | 11.5h | 11.4h |
Held during the peak of the eastern Thailand fruit harvest, this festival celebrates Rayong's famous durian, rambutan, a…
Rayong rewards those who embrace its gritty working-coast character in the dry winter, while midsummer domestic holidaymakers arrive right into the teeth of the monsoon.
Rayong is not built for the postcard circuit. Strung along the industrial and maritime edge of the Gulf of Thailand, it is a provincial capital that smells richly of simmering fish sauce, tidal mud, and diesel smoke from returning squid trawlers. The city center, centered on the tangled lanes of Tha Pradu and the working harbor of Pak Nam, functions as a bustling regional crossroads rather than an international resort. Travelers come here to slip past the chemical complexes and auto plants into a world of brackish estuary life, historic wooden shophouses, and coastal beaches where seafood is sold straight off the net. Getting the calendar right, however, means resisting the domestic summer surge and timing your arrival with the bright, trade-wind skies of winter.
December and January deliver Rayong at its absolute best. The northeast monsoon sweeps across the Gulf of Thailand as a steady, dry breeze, clearing out the lingering autumn humidity and pinning the clouds back beyond the coastal hills. The apparent heat drops to its most bearable point of the year, and the sun shines unimpeded for nearly eleven hours a day.
Down at Pak Nam, where the Rayong River empties into the sea, the fishing fleet unloads crab and mackerel under crisp blue horizons. The waterfront morning markets hum with energy, free from the oppressive swelter that bakes the pavement later in the year. In old Tha Pradu, walking along Yomjinda Road feels like stepping into a peaceful, faded port town: timber merchant houses stand open to the cool air, elderly residents converse on shady porches, and the Gulf breeze circulates freely through the narrow alleys.
February remains reliably sun-drenched, but local travel begins to pack the coast. Weekend escapes from Bangkok drive crowds to their annual peak. While the weather remains sparkling, the sense of low-key provincial quiet yields to rows of beach umbrellas and packed seafood stalls along Hat Saeng Chan. If you want the city at its sharpest and most relaxed, December is the undisputed jewel.
By late March, the sea breeze falters and the atmosphere thickens into an unrelenting, heavy blanket of humidity. April pushes the heat index toward suffocating heights, turning mid-day explorations of Choeng Noen or Noen Phra into an exhausting chore. Walking urban streets before sunset becomes an ordeal; the city effectively retreats into air-conditioned interiors until dusk.
Yet May brings the seasonal trade-off that redeems the swelter: the Rayong Fruit Festival. The province is the agricultural engine of eastern Thailand, celebrated for its orchards of durian, rambutan, and mangosteen. The festival marks the height of the harvest, drawing visitors from across the country to sample pungent, custard-smooth durian varieties and sweet, freshly picked fruit directly from orchard stalls and street markets.
The feast comes with a price in the sky. May sees the first violent thundershowers roll in off the water, cutting short afternoon outdoor plans and leaving the air thicker than before. Come for the harvest and the electric energy of the fruit vendors, but plan your movements around early morning orchard visits and midday retreats indoors.
June through August presents a baffling contradiction for the uninitiated traveler. As family summer breaks kick into gear, Thai domestic tourism swells in July, sending dense crowds streaming down the highway to fill the beachside seafood pavilions. They arrive just as the weather turns sodden and unruly.
The southwest monsoon now has a firm grip on the coast. Rain falls not as brief, poetic showers, but as relentless, gray downpours that waterlog coastal roads and turn the Gulf of Thailand choppy and brown. Sunshine is rationed to fewer than five hours a day, broken up by persistent cloud cover that traps the sea mist against the land. The breezy beach dining that draws weekenders to Hat Mae Ramphueng is often interrupted by driving rain and gusty winds that whip spray through the open-air shelters.
June retains a lingering echo of the fruit season, which keeps market stalls colorful, but by July and August the coast feels dampened and worn. Paying peak-season premiums for beachside logistics when the horizon is permanently gray is an easy mistake to make. Unless you are here purely to eat boiled shrimp in an open-sided shed while a storm pounds the tin roof, steer clear of the midsummer beach rush.
September and October bring the lowest point on the calendar. This is the peak of the rainy season, delivering Rayong's heaviest and most punishing rainstorms. Street drainage in low-lying sections of Pak Nam and riverside settlements is tested regularly as high tides collide with inland runoff. When it rains in October, it does not drizzle; it falls in sustained torrents that drown visibility, make highway driving hazardous, and shutter casual waterfront trade.
The upside is that the crowds completely vanish. Rayong belongs entirely to its fishermen, factory workers, and fruit farmers. The air is cleansed of salt haze and vehicle exhaust, but the constant threat of getting drenched makes spontaneous travel nearly impossible.
Then, in November, the weather snaps. The fierce squalls taper into occasional brief showers, the sun reasserts itself for eight hours a day, and the wind pivots back to the northeast. While the sea can still be slightly churned, the humidity plummets and the city breathes a collective sigh of relief. November is the smart traveler's quiet gateway, catching the clearing skies just before the winter high season gathers full steam.