Phuket Weather Forecast
17th - 23rd August 2026
Forecast data supplied by MET NorwayThai Meteorological Department
Does a rain symbol mean a washout?
NO. A rain icon often represents a short tropical shower rather than a full wet day. For scuba diving, wave height and the captain’s live sea assessment can matter more than the rain symbol alone.
Yearly forecast
Monthly rainfall
Average sunshine
Average temperature
Phuket diving weather month by month
These long-term Phuket averages help divers understand the usual pattern through the year. Always combine them with the live seven-day forecast and the dive team’s final sea assessment, because visibility, current and wave conditions vary by site and day.
What is Phuket diving weather like in January?
January is normally bright and comparatively dry, averaging 28.3°C, around 9 sunshine hours a day and about 50 mm of rain. Calmer Andaman Sea conditions often make this an excellent month for local Phuket dives and longer offshore trips.
What is Phuket diving weather like in February?
February is usually Phuket’s driest month, with a mean near 29°C, about 8.7 sunshine hours a day and roughly 24 mm of rain. Seas are often settled and this is one of the strongest periods for comfortable boat diving, subject to the day’s current and site conditions.
What is Phuket diving weather like in March?
March stays sunny and becomes hotter, averaging 29.4°C, 8.9 sunshine hours a day and around 81 mm of rain. Dive schedules usually run normally, with warm water and generally favourable sea conditions across Phuket and the wider Andaman region.
What is Phuket diving weather like in April?
April is typically the hottest month, averaging 29.6°C, around 8 sunshine hours a day and 135 mm of rain. Diving remains popular, although humidity rises and brief afternoon showers become more common toward the end of the month.
What is Phuket diving weather like in May?
May begins the green-season transition, averaging 29.1°C, about 5.1 sunshine hours a day and 237 mm of rain. Phuket dive trips continue, but west-coast seas can be wavier; the Similan and Surin marine parks normally close after 15 May.
What is Phuket diving weather like in June?
June is warm and changeable, averaging 28.7°C, 3.9 sunshine hours a day and about 249 mm of rain. Local diving continues at suitable sites, while the southwest monsoon can produce rougher crossings and occasional schedule changes.
What is Phuket diving weather like in July?
July stays warm at around 28.4°C, with approximately 3.9 sunshine hours a day and 240 mm of rain. There are often bright periods between showers, and dive teams select sites according to wind, waves and shelter on the day.
What is Phuket diving weather like in August?
August averages about 28.3°C, 3.8 sunshine hours a day and 309 mm of rain. Diving is still possible around Phuket, but sea conditions can change quickly, so the captain’s morning assessment and suitable sheltered routes are important.
What is Phuket diving weather like in September?
September is usually Phuket’s wettest month, averaging 27.8°C, 3.6 sunshine hours a day and about 350 mm of rain. Warm water remains, but rougher seas and reduced visibility are more likely, making flexibility particularly valuable.
What is Phuket diving weather like in October?
October is a transition month, averaging 27.6°C, 5.8 sunshine hours a day and around 336 mm of rain. Phuket diving continues when conditions allow; the offshore parks normally reopen on 15 October, although early-season crossings can still be lively.
What is Phuket diving weather like in November?
November usually improves as the drier season settles in, averaging 28°C, 7.3 sunshine hours a day and about 178 mm of rain. More offshore schedules become practical, though the odd windy or wet day can still affect longer crossings.
What is Phuket diving weather like in December?
December is normally brighter and much drier, averaging 27.9°C, 8.4 sunshine hours a day and around 82 mm of rain. Sea conditions are often comfortable and the full Phuket, Similan and Surin diving season is busy, especially around Christmas and New Year.
Phuket Weather FAQ
How accurate is a seven-day Phuket diving forecast?
It is useful for overall planning, but recheck the final 24–48 hours. The captain and dive team will make the final decision using current wind, waves, site exposure and official warnings.
When is the best time to scuba dive in Phuket?
January to April often brings the calmest seas and driest weather. Good diving also occurs in November and December, while suitable local Phuket sites operate through much of the green season.
Do I need scuba-diving insurance?
Thailand Divers requires all certified divers joining scuba day trips, liveaboards or courses for certified divers to have their own suitable scuba-diving insurance before diving. This includes Refresher, Advanced Open Water, Nitrox and Deep Diver courses. Insurance is not included in these bookings.
Your existing travel insurance or personal dive insurance is acceptable if it covers your planned scuba diving in Thailand, including the activities, maximum depth and all dive dates, with cover for dive-accident medical treatment, emergency evacuation and recompression chamber treatment. Check eligibility, limits and exclusions with your insurer and bring confirmation of cover.
If you already have suitable cover, you do not need to buy another policy. If you need cover, see our scuba insurance guide and DAN short-term option. Check the policy before purchasing.
Scuba-diving accident cover is included for Discover Scuba Diving, Explore Scuba and Open Water students during their booked course, subject to eligibility and policy terms. These students do not need to arrange separate scuba cover for those course activities. This does not replace travel insurance or cover later certified fun dives.
Does rain stop scuba diving in Phuket?
Usually not. A short tropical shower rarely stops a dive by itself. Strong wind, large waves, poor visibility or an official warning are more important operational factors.
Can I dive in Phuket during the green season?
Yes. Local dive teams continue to run suitable Phuket routes when conditions allow. Sites and schedules may change, and rougher days can occasionally be delayed, rescheduled or cancelled.
When do the Similan and Surin diving seasons open?
The national marine parks normally open from 15 October to 15 May. Exact operating dates and crossings still depend on park announcements, boat schedules and sea conditions.
Which forecast detail matters most for a dive boat?
Rain probability is only one part of the picture. Wave height, wind direction, swell, visibility and the route’s exposure all help the captain decide whether a trip is comfortable and safe.
Will a Phuket dive trip be cancelled in bad weather?
Most trips operate as planned. In the green season, unsafe sea conditions can occasionally cause a change or cancellation; if that happens, Thailand Divers will offer the available rescheduling or refund options.
Is the sea warm enough to dive all year?
Yes. Phuket’s sea remains tropical throughout the year. Most divers use a lightweight exposure suit, with individual comfort and dive duration affecting the final choice.
Can different Phuket dive sites have different conditions?
Yes. One site can be sheltered while another is exposed to wind or swell. The captain may adjust the route to give the best practical conditions available that day.
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