Thailand Krabi Weather in September — Climate Guide
September in Krabi is moderate
Krabi Weather in September — Quick Answer
As of 2026- Avg temp
- 31° / 24°
- Rainfall
- 320mm · 20 days
- Crowds
- Quiet
As of 2026, Krabi in September averages a high of 31°C and low of 24°C with 320mm of rain over about 20 days. Wettest month — fully waterproof gear. Quick-dry inner layer. Multiple changes of clothes.
September is moderate for Krabi.
September is statistically Krabi's wettest month (320mm, 20 rainy days) and lowest tourist arrival period. Hotel pricing back to year's lowest (Ao Nang 4-star $40-100/night). Phi Phi cancellation rate hits 40-50%. Many smaller longtail boat operators close September entirely.
This is the canonical 'risk it for value' month — if you accept that 30-50% of outdoor plans will get rained out and you'll spend more time at the hotel pool, you get luxury resorts at 50% of peak pricing and near-empty restaurants + spas. Honeymoon couples staying at all-inclusive Rayavadee / Phulay Bay mostly notice the rain only during sunset photography.
Travel score
Wettest month + year's lowest pricing — risk it for value
September Weather at a Glance
September averages 88°F / 31°C highs and 75°F / 24°C lows with 20 rainy days and 320mm rainfall — wettest month of the year. Humidity 84%. UV 9. Sunshine 5 hours. Sea 28°C but most dangerous of year (red flags persistent). Daily storms heavier + frequent 3-5 day rain stretches.
September Travel Advice
Travel insurance with cancellation coverage absolutely essential. Phi Phi reservation = expect 40-50% chance of cancellation. Krabi Hot Springs jungle tour better odds. Luxury resort all-inclusive booking = best strategy. Climbing on Railay generally not viable (wet rock + danger).
Flying In from Overseas
Year's lowest tourist arrivals = year's lowest international flight pricing. Direct flights to BKK from Seoul $250-400, Tokyo $250-400, Sydney $350-500. From BKK to KBV $40-80. Mid-Autumn Festival (varies mid-Sept) adds brief regional uptick from East Asian markets. Western shoulder before October recovery.
September Pricing Trends
Year's lowest pricing returns: Ao Nang 4-star $40-90/night, Klong Muang luxury $130-280, Rayavadee $400-900. Phulay Bay $300-650. Phi Phi day tour $30-50. Flights from BKK $40-80.
Krabi September Weather Stats
Avg High
31°C
Avg Low
24°C
Rainy Days
20
320mm total
Sunshine
5h
Daily avg
Humidity
84%
high
UV Index
9
Very high
Wind
14 km/h
Gusts 35
Sea Temp
28°C
dangerous
Crowds
Quiet
At attractions
September Sunrise & Sunset
Air Quality
PM2.5
9 μg/m³
PM10
18 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
35°C
Nighttime
26°C
Humidity and wind affect how the actual temperature feels.
Wind
14 km/h
Max gust 35 km/h
Activities Recommended for September
September Travel Pros & Cons
Pros
- Hotels 50% off peak
- Near-empty restaurants + spas
- Luxury resort bargains (Rayavadee + Phulay Bay)
- Jungle at peak monsoon green
Cons
- Wettest month of year
- Phi Phi 40-50% cancellations
- Many longtail operators close
- Sea most dangerous
September Events & Festivals
- Wettest month of year
- Lowest tourist arrivals
- Mid-Autumn Festival (varies, mid-Sept)
Krabi in September — Full Picture
September is statistically Krabi's wettest month (320mm, 20 rainy days) and lowest tourist arrival period. Hotel pricing back to year's lowest (Ao Nang 4-star $40-100/night). Phi Phi cancellation rate hits 40-50%. Many smaller longtail boat operators close September entirely.
This is the canonical 'risk it for value' month — if you accept that 30-50% of outdoor plans will get rained out and you'll spend more time at the hotel pool, you get luxury resorts at 50% of peak pricing and near-empty restaurants + spas. Honeymoon couples staying at all-inclusive Rayavadee / Phulay Bay mostly notice the rain only during sunset photography.
For day-trippers and active travelers: skip September. For pool + spa + dining + cultural Krabi: this is the bargain month.
What to Wear & What to Pack
Wettest month — fully waterproof gear. Quick-dry inner layer. Multiple changes of clothes.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
33.7°C
25°C
11.3/mo
Summer (Jun·Jul·Aug)
32°C
25°C
18/mo
Autumn (Sep·Oct·Nov)
Current31.3°C
24°C
17.7/mo
Winter (Dec·Jan·Feb)
32°C
23.3°C
4.3/mo
Krabi Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| January (Best) | 32° | 23° | 4d·35mm | 9h | 75% | 10 | Very busy | Peak |
| February (Best) | 33° | 24° | 3d·25mm | 10h | 72% | 11 | Very busy | Peak |
| March (Best) | 34° | 25° | 6d·70mm | 9h | 75% | 11 | Busy | Shoulder |
| 34° | 25° | 10d·130mm | 9h | 78% | 11 | Busy | Peak | |
| 33° | 25° | 18d·280mm | 7h | 82% | 11 | Moderate | Shoulder | |
| 32° | 25° | 17d·250mm | 7h | 80% | 10 | Moderate | Low season | |
| 32° | 25° | 18d·260mm | 6h | 80% | 10 | Busy | Shoulder | |
| 32° | 25° | 19d·290mm | 6h | 82% | 10 | Busy | Shoulder | |
| 31° | 24° | 20d·320mm | 5h | 84% | 9 | Quiet | Low season | |
| 31° | 24° | 18d·280mm | 6h | 82% | 9 | Moderate | Low season | |
| 32° | 24° | 15d·220mm | 7h | 78% | 9 | Busy | Shoulder | |
| December (Best) | 31° | 23° | 6d·60mm | 8h | 75% | 9 | Very busy | Peak |
View Other Months
Krabi September Hotel Picks
Frequently Asked Questions
Is September a good time to visit Krabi?
Krabi in September is moderate. Tourist crowds are quiet and flight/hotel prices are low season.
What's the average temperature in Krabi in September?
Krabi September averages a high of 31°C and a low of 24°C.
Does it rain much in Krabi in September?
Krabi September averages 320mm of rainfall over about 20 rainy days.
What should I wear in Krabi in September?
Wettest month — fully waterproof gear. Quick-dry inner layer. Multiple changes of clothes.
What time are sunrise and sunset in Krabi in September?
Krabi September sunrise is 06:20 and sunset is 18:05, with 11h 45min of daylight.
What's the air quality like in Krabi in September?
Krabi September air quality (AQI) averages 30, rated Good. PM2.5 averages 9μg/m³.
What activities are recommended in Krabi in September?
In September, Krabi is great for Luxury resort stays, Spa days, Krabi Town heritage indoor.
Is September peak season in Krabi?
Krabi September crowds are quiet and prices are low season. You can travel relatively comfortably without long queues.
Best Months to Visit Krabi
View Other Months
Planning a September trip to Krabi?
You've checked the weather — next come the budget and the route.
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.