A clear, month-by-month guide to Chonburi's Gulf-coast climate - the cool dry season, the hot season and the southwest monsoon - covering Sriracha, Laem Chabang, Amata Nakorn and Bang Saen, plus what to pack.
Chonburi is warm to hot and humid year-round, with three broad seasons: a cool, dry, sunny stretch from November to February (the best time to visit or move), a hot season from March to May that peaks at Songkran in April, and a southwest-monsoon rainy season from roughly May to October. Whether you're weighing a corporate posting near Amata Nakorn and Laem Chabang or a weekend at Bang Saen beach, the cool season offers the calmest sea and the easiest conditions for a move.
The most comfortable and busiest stretch of the year across Chonburi, from Sriracha's industrial estates to Bang Saen's beaches. Northeast-monsoon air brings low humidity, reliable sunshine, a calmer Gulf sea and pleasantly cooler evenings. It's the easiest season for settling into a new corporate posting or relocation, and for weekend trips to the coast.
Heat and humidity build toward an April peak, coinciding with Songkran. The EEC industrial zones around Amata Nakorn and Laem Chabang can feel especially warm with less natural shade and airflow than the coast, while a sea breeze takes some of the edge off Bang Saen and Sriracha's waterfront. Expect mostly dry, bright days early on, with the first showers building toward May.
Chonburi's wettest stretch, driven by the southwest monsoon off the Gulf of Thailand, with September and October typically the heaviest months. Rain generally falls as short, intense afternoon or evening downpours rather than all-day grey. Low-lying parts of Sriracha and central Chonburi city can see localised street flooding after the heaviest storms, particularly around high tide.
Approximate daytime highs and overnight lows, typical rainfall and sea conditions for each month. Figures are climate averages - individual years vary.
| Month | High | Low | Rain | Sea | Verdict |
|---|---|---|---|---|---|
| January | 32° | 22° | Very low | Calm & clear | Peak season |
| February | 33° | 23° | Very low | Calm & clear | Peak season |
| March | 34° | 25° | Low | Warm, breezy | Hot but dry |
| April | 35° | 26° | Low-moderate | Warm | Hottest · Songkran |
| May | 34° | 26° | Moderate | Warm, choppier | Monsoon onset |
| June | 33° | 26° | Moderate | Variable | Regular storms |
| July | 32° | 25° | Moderate | Variable | Regular storms |
| August | 32° | 25° | Moderate-high | Choppier | Showery |
| September | 31° | 25° | Highest | Murkier, choppy | Wettest month |
| October | 31° | 24° | High, easing | Murkier, easing | Wet, drying late |
| November | 31° | 23° | Low | Calming, clearer | Excellent |
| December | 31° | 22° | Very low | Calm & clear | Peak — ideal |
Temperatures in °C. Inland industrial zones (Amata Nakorn, parts of Sriracha) run slightly warmer than the immediate coastline.
For the most reliable weather, come between November and February: dry, sunny days, low humidity and a calm, clear Gulf sea at Bang Saen. March to May is hot and increasingly humid, with April the hottest month and the EEC industrial zones feeling the heat most. The May-October monsoon brings lower rents and hotel rates and a quieter coast, in exchange for regular afternoon downpours peaking in September and October. Corporate relocations to Amata Nakorn, Laem Chabang or Sriracha often schedule the move for the cool season to ease the settling-in period.
| Season | What to bring |
|---|---|
| Cool dry season (Nov-Feb) | Light clothing for the day plus a light layer for breezy evenings and strong air-conditioning in offices and malls. Sunscreen, hat and sunglasses year-round. |
| Hot season (Mar-May) | The lightest, most breathable fabrics, high-SPF sunscreen and a refillable water bottle. Corporate and industrial-zone commutes are more comfortable in loose, breathable office wear given the heat around Amata Nakorn and Laem Chabang. |
| Rainy season (May-Oct) | A compact umbrella or packable rain jacket, quick-dry footwear and a dry bag for electronics. Showers are usually brief but can be intense, so keep rain gear handy during any commute. |
November to February is the best time. This cool, dry season brings low humidity, reliable sunshine, a calm clear Gulf sea and the most comfortable conditions for settling into a corporate relocation or exploring Bang Saen, Sriracha and the wider province.
Chonburi's rainy season runs roughly May to October, peaking in September and October. Rain typically falls as short, heavy afternoon or evening downpours rather than sustained all-day rain, though the heaviest storms can cause localised street flooding in low-lying central Chonburi and parts of Sriracha.
Chonburi is warm to hot and humid year-round, with daytime highs around 31-33°C in the cool season and up to roughly 34-35°C at the April peak. The industrial EEC zones around Amata Nakorn and Laem Chabang can feel a touch warmer than the immediate coastline due to less airflow, while a sea breeze keeps Bang Saen and the Sriracha waterfront more comfortable.
The calmest, clearest sea is from November to February. During the May-October monsoon, especially September and October, the water off Bang Saen and Sriracha can be choppier and murkier after storms, so cool-season visits are best for swimming and beach time.
Breathable, professional clothing suited to heat and humidity for daily commutes to Amata Nakorn, Laem Chabang or Sriracha offices, plus a compact umbrella for the May-October monsoon and a light layer for cool-season evenings and heavily air-conditioned offices.
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Whether you're relocating for work near Amata Nakorn and Laem Chabang or want a coastal base near Bang Saen, match the right area to how you want to live, then browse residences there.
General climate information based on long-term averages; actual weather varies year to year - check a current forecast before you travel. Hero photo by Quang Nguyen Vinh on Pexels.