Diving in Low Season


During the low season (May – October), we moor our boats in Lanta Old Town on the East side of the island. We operate a more flexible trip schedule and are able to offer trips to Ko Haa, Ko Rok and Hin Daeng & Hin Muang (weather permitting) but we do not usually make trips to Ko Phi Phi or King Cruiser Wreck.
We aim to offer trips every day, however there are some days when, due to the wind and waves, we are not able to take the boats out.

Koh Lanta’s tropical climate is governed by 2 distinct monsoons, the ‘Dry’ North-east monsoon which coincides roughly with high season (between November and April), and the ‘Rainy’ South-West monsoon falling roughly between May and October, or the tourist low season.

The South-West monsooon winds that control Lanta’s weather over this period do not switch direction at the exact same time each year.
These winds bring a mixture of dry and wet days, and it is far from unusual to experience gloriously sunny weather for weeks at a time even during the rainy season.
At the start of the monsoon season the rain tends to come in the late evening or night. The most rainfall seems to occur from around September to mid-October.
In general when it does rain, it tends to be heavy, quick and occur in short bursts. Occasionally it may rain for 3 or 4 days towards the end of the season.

If you are a fan of fish over divers then this is the ideal time to come and dive Koh Lanta!

From May through to around August the visibility actually increases, with distances in excess of 50 meters being reported from Ko Haa and Hin Daeng, Hin Muang. Crystal blue, aquarium-like conditions are frequently experienced by divers coming at this time of year. The visibility tends to start dropping slightly between the beginning of September to October, but even at this time rarely drops below 15m at Ko Haa. The water temperature hovers around 30-31 degrees through until the start of September, then drops slowly to around 28 degrees.

Scubafish use Lanta Old Town, a picturesque and historic fishing town on the South East of the island, as our departure point throughout these months. Enjoy plenty of room on our comfortable, spacious dive boats, and an even more personal service from divemasters and instructors, as you take in the sights of the National Park and lighthouse during your journey around the bottom of the island, passing several of the smaller Lanta archipelago islands on your trip out.
Approach dive sites where often you will be on the only boat. The reduction in dive and boat activity lends itself to some spectacular diving, with a natural increase in marine life activity, and the ability to offer longer dives. It’s like ‘spring’ underwater and is when the marine activity seems to peak. Many juvenile fish are born during this time and seek shelter near the reef alongside huge swarms of tiny glassfish and baitfish. This attracts the larger, hunting fish towards the reef who come in to look for a snack! You can often see large schools of Barracuda, Rainbow Runners and Travellie and there’s plenty of action to watch in the blue.


However do be aware that boats do not go out daily over this period since sea conditions can become unfavourable, although it is not rain that limits these activities, but the wind and resulting waves.


Our boat captains keep a keen eye on weather forecasts and reports, and make informed decisions on a daily basis as to whether boats go out, and to where….safety first!
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