Best Time to Visit Thailand 2026: Weather by Month

Thailand weather by month

Colour shows the month rating for the best region. Tap a month for details.

Excellent Good Mixed Off-season

Thailand air and sea temperature by month

Bangkok & Pattaya: air
Bangkok & Pattaya: sea
Andaman coast: air
Andaman coast: sea
Gulf islands: air
Gulf islands: sea

Thailand temperature by month, °F
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Bangkok & Pattaya: air	88	90	92	94	93	91	89	89	88	87	88	88
Bangkok & Pattaya: sea	82	83	85	87	88	87	86	86	86	86	85	83
Andaman coast: air	88	91	93	91	88	86	86	85	85	85	85	86
Andaman coast: sea	84	85	86	88	89	87	87	87	85	86	85	85
Gulf islands: air	82	83	86	88	88	88	87	87	85	84	83	82
Gulf islands: sea	83	84	85	88	89	88	87	87	87	87	85	83

When to visit each region of Thailand

Bangkok & Pattaya central, eastern Gulf

Best months: June, November to March. Rainiest: September to October. Highs range from 87°F (31°C) to 94°F (34°C), sea 82–88°F (28–31°C).

Andaman coast Krabi, Khao Lak

Best months: January to April. Rainiest: May, July to November. Highs range from 85°F (29°C) to 93°F (34°C), sea 84–88°F (29–31°C).

Phuket month by month →

Gulf islands Koh Samui, Koh Phangan

Best months: January to September. Rainiest: October to December. Highs range from 82°F (28°C) to 88°F (31°C), sea 82–90°F (28–32°C).

Best time to visit Thailand: FAQ

When is the best time to visit Thailand?

The best time to visit Thailand: in Bangkok and Pattaya, June, November to March; on the Andaman coast, January to April; on the Gulf islands, January to September. The wettest stretch on the Andaman coast is September, October, November. It is hottest in Bangkok and Pattaya in April, with highs of 94°F (34°C).

What is Thailand's rainy season?

Months with more than 200 mm (7.9 in) of rain: in Bangkok and Pattaya, September to October; on the Andaman coast, May, July to November; on the Gulf islands, October to December. The wettest month on the Andaman coast is October, with about 11.9 in (301 mm).

Is Thailand hot all year?

Day highs in Bangkok and Pattaya range from 87°F (31°C) to 94°F (34°C). The hottest month is April in Bangkok and Pattaya, at 94°F (34°C).

Should I visit Phuket or Bangkok?

Bangkok is best June, November to March; the Andaman coast, where Phuket is, is best January to April. Check the month pages for the details.

Where the data comes from

Air temperature, rainfall, humidity — ERA5 reanalysis (Copernicus / ECMWF) via Open-Meteo, averaged over 2015–2024. Each region uses one point: the resort or city in its caption.
Sea temperature — Open-Meteo Marine, average sea surface temperature for 2023–2026 (the source has no longer record yet).
Rainy days — days with at least 1 mm (0.04 in) of rain. Reanalysis picks up light rain more often than weather stations, so treat this as an upper bound.
Month rating — one rule for every destination, based on three factors: day highs (ideal 75–91°F / 24–33°C), monthly rainfall (ideal under 80 mm / 3.1 in) and, for beach regions, sea temperature (ideal 77°F / 25°C or warmer). All ideal means Excellent; one slightly weaker factor means Good. Mixed means heavy rain (150 mm / 5.9 in or more), highs above 97°F (36°C) or a sea below 70°F (21°C). Off-season means highs of 100°F (38°C) or more, cold below 54°F (12°C), over 350 mm (13.8 in) of rain, or several problems at once. A country's rating follows its best region, so check the regional table.

Checked September 29, 2026. Climate normals are refreshed yearly and the notes every 90 days. These are long-term averages, not a forecast: any given year can differ.

Best Time to Visit Thailand