Island in Surat Thani, Thailand

Internet in Koh Samui: speed, SIM cards and coworking

Updated October 2026Sources

299 MbpsMedian download

Is the internet good in Koh Samui?

Median fixed broadband in Thailand is 299 Mbps and mobile is 134 Mbps (Speedtest Global Index, 2026-08). Café wifi is generally good in Bophut, Chaweng and Lamai; 5G covers the main beaches.

Getting online in Koh Samui

	Details
Home fibre	Fibre from AIS, True and 3BB in most villas and condos; about 600–1,000 THB a month.
Cafés and coworking	Café wifi is generally good in Bophut, Chaweng and Lamai; 5G covers the main beaches.
Outages	Power cuts in storms, mostly Oct–Dec
Tourist SIM	AIS, True and dtac airport counters sell tourist SIMs and eSIMs, roughly 300–600 THB for 8–15 days; passport required.
eSIM	Local carriers sell eSIMs to visitors.
Carriers	AIS, True, dtac
Monthly data plan	฿300–600 ($8.9–17.9)

Coworking in Koh Samui

There's no dedicated coworking scene here; people work from cafés and accommodation.

Internet speeds in Southeast Asia

National medians, Speedtest Global Index.

Country	Fixed	Mobile
Singapore	463 Mbps	164 Mbps
Vietnam	301 Mbps	220 Mbps
Thailand	299 Mbps	134 Mbps
Malaysia	179 Mbps	165 Mbps
Philippines	114 Mbps	66 Mbps
Brunei	86 Mbps	254 Mbps
Laos	60 Mbps	45 Mbps
Cambodia	55 Mbps	112 Mbps
Indonesia	51 Mbps	66 Mbps
Myanmar	25 Mbps	—

Quick answers

Is the internet fast in Koh Samui?

Median fixed broadband in Thailand is 299 Mbps and mobile is 134 Mbps (Speedtest Global Index, 2026-08). Café wifi is generally good in Bophut, Chaweng and Lamai; 5G covers the main beaches.

Which SIM card should I get in Koh Samui?

AIS, True and dtac airport counters sell tourist SIMs and eSIMs, roughly 300–600 THB for 8–15 days; passport required.

Can I use an eSIM in Thailand?

Yes. Local carriers sell eSIMs to visitors, and travel eSIMs work too.

More about Koh Samui

Going to Koh Samui solo?

SoloSquare is where travelers, nomads and locals in Koh Samui meet up for small plans: coffee, dinners, walks and day trips. Join one, or start your own in a minute.

See plans in Koh Samui

Sources

Speeds are medians from Ookla's Speedtest Global Index, cited for reference. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.