Koh Tao Dive Site Report Mar 2 – Mar 8
From the team at Master Divers
Location: Koh Tao, Gulf of Thailand
Early March in Koh Tao marks a noticeable transition toward calmer seas and more consistent diving conditions. The northeast monsoon influence continues to ease, creating longer windows of smooth surface conditions and improving underwater visibility.
At Master Divers, we monitor forecasts daily using data from Windy, Windguru and the Thai Meteorological Department (TMD), combining regional weather modelling with real-time local observations to plan the safest and most enjoyable dive schedule.
Whether you’re fun diving or completing a PADI course, this week offers promising conditions.
Weather Overview
Forecast models indicate predominantly dry days with partial sunshine and passing cloud cover. Short tropical showers remain possible, most likely in late afternoon or overnight periods rather than peak dive hours.
Humidity remains typical for the season, but sustained rainfall is not expected.
Wind Conditions
Wind direction remains primarily northeasterly, though at reduced intensity compared to January. Wind speeds are forecast to range from light to moderate (approximately 5–14 knots), contributing to generally comfortable boat crossings.
Stronger gusts may occasionally develop midday, but extended periods of high wind are unlikely.
Swell & Sea State
Residual NE swell continues to taper, averaging around 0.5–1 metre. Exposed eastern sites may experience light surface movement during breezier periods, while western and southern bays should remain calm and protected.
Overall, sea state conditions are favourable for training dives, deeper excursions and multi-dive days.
Underwater Visibility
Visibility across Koh Tao is expected to remain stable to improving. Reduced wind intensity and calmer seas contribute to clearer surface conditions, particularly at sheltered sites.
Plankton levels may fluctuate slightly, but these nutrient-rich waters continue to support strong marine life activity.
Marine Life Activity
Marine life around Koh Tao remains dynamic as we move further into March.
Whale shark potential continues, with divers scanning deeper pinnacles and offshore sites. While sightings are never guaranteed, conditions remain supportive and anticipation remains high. Schools of trevally and barracuda remain active, adding energy to mid-water scenes.
Macro life continues to thrive. Patient divers focusing on slower exploration are being well rewarded.
Water Temperature & Exposure
Water temperatures remain warm at approximately 28–29°C. A 3mm wetsuit or shorty provides comfortable protection for most divers, while experienced tropical divers may opt for lighter exposure suits.
Weekly Diving Outlook
Overall, March 2–8 offers balanced and improving dive conditions. Morning departures continue to provide the calmest surface windows, with broad site accessibility expected throughout the week.
At Master Divers, dive planning remains flexible and responsive to real-time conditions, ensuring safe, comfortable and high-quality diving experiences for all levels — from beginner PADI students to experienced divers.
