The rainy season of Thailand is May to the end of October, it's a long time but don't be afraid that the rain comes and goes fast.
If it rains, we can also do sth interesting.
Here is 10 Things to do in Pattaya when it rains.
1. Central Festival Pattaya
2. Ripley’s Believe It or Not! Museum
3. Ladyboy Cabaret Shows
4. Art in Paradise Pattaya
5. Underwater World Pattaya
6. Teddy Bear Museum
7. Relax at a Spa
8. Pattaya Boxing World
9. Harbor Mall Pattaya
10. Bottle Art Museum
We can learn more via Top 10 Things to do in Bangkok When it Rains.