When is the Monsoon / Wet Season in Thailand?
In the West (Andaman Coast): June, July, August, September, and into October
In the South & East (Thai Gulf Coast): September, October, November, December
The wet season dates do vary a bit year to year so just check the weather forecast before you go.
During these times you can expect heavy rains and rough water but this is also when a lot of cruises run as they know there will be enough water to get the boats through the rivers. Some parts of Thailand it will even rain super heavy but only for short periods of time but then there are also sometimes storms that will last for days. Flooding is common due to this, even in Bangkok. The temperatures range from 27°C to 32°C (80°F to 90°F) and the humidity makes it feel even worse.
Things you must pack:
- windproof umbrella
- waterproof rain jacket
- a couple pairs of shoes so one can dry while you wear the other, things like:
- waterproof shoes and / or hiking boots - a better option is ventilated, quick drying instead of waterproof
- shoes / closed toe sandals that tie or are strapped on snugly but also dry quickly
- make sure that they do not have a plastic bottom as you will just slide around
- Flashlight and power bank - just in case the power goes out
- tissues, antibacterial wipes, and hand sanitizer
- footpaths and coble stones can have you wobbling around and if you step on a loose one then you will splash yourself with murky, foul smelling, or questionable water