Where is the sea coldest in Thailand in September?

Kamala Beach in Thailand has the coldest sea in Thailand in September, averaging about 29.0 °C. Freedom Beach (29.0 °C) and Hua Hin Beach are the next coolest.

How many beaches in Thailand are warm enough to swim in September?

24 of the top 24 ranked beaches in Thailand average 22 °C or more in September, which most swimmers find comfortable without a wetsuit.

How are these September sea temperatures calculated?

Each figure is a long-term monthly average sea surface temperature for that location, so it reflects a typical September rather than today's reading. Open a beach page for the live water temperature and 7-day forecast.

Seasonal ranking

Coldest sea temperature in Thailand in September

Where the sea is coolest across Thailand during September, ranked by long-term monthly average water temperature. Kamala Beach (Phuket, Thailand) is the coolest at around 29°C. Open any spot for today's live water temperature and a 7-day swim forecast.

1
Kamala Beach
Phuket · Thailand · Andaman Sea
Warm — comfortable swimming
29°C
September average
2
Freedom Beach
Phuket · Thailand · Andaman Sea
Warm — comfortable swimming
29°C
September average
3
Hua Hin Beach
Prachuap Khiri Khan · Thailand · Gulf of Thailand
Warm — comfortable swimming
29°C
September average
4
Pattaya Beach
Chonburi · Thailand · Gulf of Thailand
Warm — comfortable swimming
29°C
September average
5
Long Beach Phi Phi
Krabi · Thailand · Andaman Sea
Warm — comfortable swimming
29°C
September average
6
Tonsai Beach
Krabi · Thailand · Andaman Sea
Warm — comfortable swimming
29°C
September average
7
Freedom Beach
Phuket · Thailand · Andaman Sea
Warm — comfortable swimming
29°C
September average
8
Klong Dao Beach
Krabi · Thailand · Andaman Sea
Warm — comfortable swimming
29°C
September average
9
Bottle Beach
Surat Thani · Thailand · Gulf of Thailand
Warm — comfortable swimming
29°C
September average
10
Sairee Beach
Surat Thani · Thailand · Gulf of Thailand
Warm — comfortable swimming
29°C
September average
11
Chaweng Beach
Surat Thani · Thailand · Gulf of Thailand
Warm — comfortable swimming
29°C
September average
12
Loh Dalum Bay
Phi Phi Islands · Thailand · Andaman Sea
Warm — comfortable swimming
29°C
September average
13
Long Beach Ko Lanta
Ko Lanta · Thailand · Andaman Sea
Warm — comfortable swimming
29°C
September average
14
Charlie Beach
Trang & Satun · Thailand · Andaman Sea
Warm — comfortable swimming
29°C
September average
15
Ko Kradan Beach
Trang & Satun · Thailand · Andaman Sea
Warm — comfortable swimming
29°C
September average
16
Pattaya Beach Lipe
Trang & Satun · Thailand · Andaman Sea
Warm — comfortable swimming
29°C
September average
17
Donald Duck Bay
Ko Similan · Thailand · Andaman Sea
Warm — comfortable swimming
29°C
September average
18
Nang Thong Beach
Khao Lak · Thailand · Andaman Sea
Warm — comfortable swimming
29°C
September average
19
Maenam Beach
Ko Samui · Thailand · Gulf of Thailand
Warm — comfortable swimming
29°C
September average
20
Haad Yuan
Ko Pha-ngan · Thailand · Gulf of Thailand
Warm — comfortable swimming
29°C
September average
21
Freedom Beach Ko Tao
Ko Tao · Thailand · Gulf of Thailand
Warm — comfortable swimming
29°C
September average
22
White Sand Beach Ko Chang
Ko Chang & Trat · Thailand · Gulf of Thailand
Warm — comfortable swimming
29°C
September average
23
Klong Chao Beach
Ko Chang & Trat · Thailand · Gulf of Thailand
Warm — comfortable swimming
29°C
September average
24
Sai Kaew Beach
Ko Samet · Thailand · Gulf of Thailand
Warm — comfortable swimming
29°C
September average

Coldest sea in September elsewhere

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Thailand in September — frequently asked questions

Where is the sea coldest in Thailand in September?: Kamala Beach in Thailand has the coldest sea in Thailand in September, averaging about 29.0 °C. Freedom Beach (29.0 °C) and Hua Hin Beach are the next coolest.
How many beaches in Thailand are warm enough to swim in September?: 24 of the top 24 ranked beaches in Thailand average 22 °C or more in September, which most swimmers find comfortable without a wetsuit.
How are these September sea temperatures calculated?: Each figure is a long-term monthly average sea surface temperature for that location, so it reflects a typical September rather than today's reading. Open a beach page for the live water temperature and 7-day forecast.

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