Pattaya Weather by Month: Rainy Season and Best Time to Visit

The driest stretch in Pattaya runs from November to February. December averages about 11.7 mm of rain and roughly 1.5 rainy days, while October is the wettest month with about 224 mm and up to 14 days of rain. April is the hottest, at around 33 °C by day and about 26 °C at night. These are long-term averages, not a forecast for your week, but they set realistic expectations for planning a trip or a longer stay.

Pattaya sits on the Gulf of Thailand, which is calmer than the Andaman side where Phuket lies. Rain usually arrives from about May to October and builds gradually: March brings about 69 mm, April about 68 mm, May already about 161 mm, and it climbs to 224 mm in October. September and October are the two wettest months of the year.

A typical rainy-season day looks like this: sun in the morning, then a heavy one or two hour downpour in the afternoon or overnight, then clear and humid again. All-day rain is rare. What suffers are plans tied to a specific hour. After a strong storm, low streets in the centre can flood, traffic stalls, scooters handle badly on oily wet asphalt, and boats to the islands do not sail if the swell is high. If your single day trip to Koh Larn falls on such a day, the rainfall statistics will be little comfort.

Month by month at a glance

• January: around 31-32 °C by day, 22-23 °C at night, very little rain. Dry and sunny, with high-season prices.
• February: around 33 °C by day, about 23 °C at night, very little rain. One of the driest months, with sun every day.
• March: around 32 °C, about 69 mm of rain. Heat builds and it gets muggy by midday.
• April: around 33 °C by day, about 26 °C at night, about 68 mm. The hottest month, and Songkran falls in mid-April.
• May: 33-35 °C, about 161 mm. The rains set in, but there is still plenty of sun.
• June to August: hot and humid with regular short downpours, lush greenery and moderate prices.
• September: warm and muggy with heavy rain, the second wettest month.
• October: about 224 mm and up to 14 rainy days, the wettest month of the year.
• November: 30-31 °C, about 56.6 mm and about 4 rainy days. The turn towards dry weather.
• December: 26-30 °C, about 11.7 mm and about 1.5 rainy days. The driest month, with humidity around 70.3%.

One quirk: different multi-year datasets name either December or February as the driest month. The gap is tiny and both are dry, so choose between them on price and crowds, not rainfall.

March to May and Songkran: the heat people underestimate

From March to May the temperature climbs to 33-35 °C, humidity rises and the sea stops offering relief. The water sits around 28-30 °C, so swimming feels like a warm bath. Sightseeing at midday in April is a poor idea, so shift it to after 4 pm. Songkran in mid-April is fun but never background noise: you and your camera will get soaked. Use a waterproof pouch for your phone and skip the scooter on those days. If you came to quietly see the city, April is the worst month of the year.

When to go: November over January

The best value window is the first three weeks of November. Rainfall drops from October's 224 mm to about 56.6 mm and four rainy days, humidity eases, daytime highs are 30-31 °C, and there are noticeably fewer tourists than in December. The peak season has not started and prices are not yet at their maximum. December is drier, but December to February is very high season with peak accommodation prices and busier beaches, so you pay a clear premium for roughly 45 mm less rain.

Skip this advice if you are tied to school holidays or travelling with children and want the calmest sea and the lowest chance of a downpour. Then take December or January and book 6-8 weeks ahead, because the best options go first.

Is September or October worth it?

If you are flexible, yes. Low season means cheaper stays, emptier beaches and greener scenery, and the rain is usually short. Travellers who winter in Thailand for years happily live in Pattaya in October. Just plan differently:

• Put sea trips (Koh Larn, fishing, boats) on your first days so you have room to reschedule.
• Keep a rain plan: covered markets, malls on Second Road, the aquarium.
• Do not expect laundry or sneakers to dry overnight, as September humidity is high.
• Renting a scooter in a downpour is a real risk. Taxis and bike taxis are cheaper than the stress.

If you have a single one-week trip a year, skip October. Fourteen rainy days out of thirty-one is close to even odds, and you will not get a second attempt.

A broader regional note: Thailand has no single best month, and weather differs from coast to coast. According to Visit Thailand, the country has three seasons: cool and dry (roughly November to February), hot (peaking in April) and rainy (May to October). Other sources put daytime air temperatures at 30-33 °C all year and sea temperatures at 27-31 °C, so the real differences between months are rainfall, humidity and prices, not temperature.

FAQ

Which months are the rainy season in Pattaya?

Roughly May to October. The peak is September and October, and October brings about 224 mm of rain and up to 14 rainy days.

What is the driest month in Pattaya?

December: about 11.7 mm of rain, about 1.5 rainy days and the lowest humidity of the year at around 70.3%. February is almost as dry.

Can you swim in Pattaya during the rainy season?

Yes, the water stays warm all year at about 28-30 °C. The issue is not temperature but swell and murky water after heavy storms, plus cancelled boats to the islands.

When is Pattaya hottest?

In April: around 33 °C by day and about 26 °C at night. From March to May it can reach 33-35 °C with high humidity, and it is hardest between 11 am and 4 pm.

Which month offers the best balance of weather and price?

November. The rains have retreated (about 56.6 mm and 4 rainy days), but the peak prices of December and January have not yet begun.

One last tip on forecasts: before your trip, check the hourly breakdown rather than the cloud icon. In Pattaya rain usually takes up an hour or two a day, and if you plan lunch or a siesta around it, the day is not lost.

Source: Visit Thailand

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