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Laem Sui Lighthouse

Fl (3) W 12s🇹🇭Thailand, THOperational

Location & Light Range

About Laem Sui Lighthouse

This white metal framework tower stands 102 meters tall. Its focal height is 35 meters above sea level. The light emits three white flashes with a 12-second cycle. This lighthouse was temporarily extinguished in 2019. It has a geographic range of 9 nautical miles.

Light & Optic

Characteristic Signature
Fl (3) W 12s
Flash Type
Flashing
Light Color
White
Flash Count
3 flashes
Interval
12s
Raw Code
Fl.(3)W. period 12s
Focal Height
35m
Geographic Range
9NM

Location

City
Thailand
Country
🇹🇭TH
Latitude
9.3834°
Longitude
99.3141°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
102m
Tower Color
white
Material
metal

Structure: White metal framework tower; 102. Temporarily extinguished (2019)

References & Identifiers

Admiralty No.
F2918
NGA No.
20848
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Frequently Asked Questions

How do mariners identify Laem Sui Lighthouse at night?+
Laem Sui displays the characteristic Fl (3) W 12s — 3 white flashes every 12 seconds. Each lighthouse has a unique flash pattern published in the List of Lights, allowing mariners to positively identify it and distinguish it from other navigation aids in the area.
Which ports and harbors does Laem Sui Lighthouse guide vessels into?+
Laem Sui Lighthouse assists vessels approaching 5 nearby ports. The closest is Ban Don at 12.4 NM to the SSE. Other ports served include Surat Thani (13.5 NM S), Khanom (33.8 NM ESE), Nakhon Si Thammarat (34 NM ESE), Lang Suan (35.4 NM NNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Laem Sui Lighthouse still active and maintained?+
Yes, Laem Sui Lighthouse is currently operational. It is actively maintained and continues to emit its characteristic light signal for marine navigation. Most modern lighthouses are automated and monitored remotely by the national maritime authority.
How can I track vessels near Laem Sui Lighthouse?+
You can track vessels near Laem Sui Lighthouse in real time using MarineRadar. The platform shows live AIS positions of ships in the area, including vessel name, type, flag, speed, and course. Use the "Track Vessels Nearby" button on this page to open the live map centered on this lighthouse.