Andaman Sea forecast at a glance
This Phuket and Andaman Sea forecast covers the period from 26 August to 31 August, 2025, and is intended to help travellers plan crossings and transfers around the region's weather and sea state.
Weather Forecast for the Andaman Sea Region, Thailand. 26 August to 31 August, 2025.
Daily outlook, 26–31 August 2025
- Tuesday, August 26 — Temperature: 32–25 °C. Weather: Heavy rain, 60% of area. Sailing Conditions: Rough, waves 1.5–2 m. Tide: Low tide morning, rising afternoon.
- Wednesday, August 27 — Temperature: 32–25 °C. Weather: Heavy rain, 60% of area. Sailing Conditions: Rough, waves 1.5–2 m. Tide: High tide morning, falling evening.
- Thursday, August 28 — Temperature: 33–25 °C. Weather: Heavy rain, 60% of area. Sailing Conditions: Rough, waves 1.5–2 m. Tide: Low tide midday, rising later.
- Friday, August 29 — Temperature: 34–26 °C. Weather: Heavy rain, 40% of area. Sailing Conditions: Moderate to rough, waves 1.2–1.8 m. Tide: High tide midday, falling night.
- Saturday, August 30 — Temperature: 34–26 °C. Weather: Heavy rain, 40% of area. Sailing Conditions: Moderate, waves 1.2–1.5 m. Tide: Low tide morning, rising evening.
- Sunday, August 31 — Temperature: 33–25 °C. Weather: Heavy rain, 60% of area. Sailing Conditions: Rough, waves 1.5–2 m. Tide: High tide early morning, falling afternoon.
What changes across the week
Rain coverage eases from 60% of the area early in the week to 40% on Friday and Saturday, before returning to 60% on Sunday. Daytime highs climb from 32 °C to a peak of 34 °C on Friday and Saturday.
Sea state follows the same curve. Waves of 1.5–2 m and rough conditions on Tuesday, Wednesday and Thursday soften to 1.2–1.8 m on Friday and 1.2–1.5 m on Saturday — the calmest day in this window — then build back to 1.5–2 m on Sunday.
Who this affects
Rough seas mainly affect open-sea ferry and speedboat crossings, which are the services most likely to be delayed, rescheduled or cancelled by the operator when conditions deteriorate. Travellers prone to seasickness, families with small children and anyone carrying fragile luggage will feel the difference most on the 1.5–2 m days.
Road-based services such as buses, minivans and private transfers are far less exposed to wave height, though heavy rain can still slow journeys.
Practical tips for travellers
- Where your dates are flexible, favour Saturday 30 August, when waves are forecast at 1.2–1.5 m.
- Book earlier departures where possible and keep a buffer before onward flights or connections.
- Tide times shift daily and can affect pier access at smaller jetties — check the tide line for your travel date above.
- Confirm your operator's cancellation and rebooking terms at checkout before you pay.
Plan your crossing
Live departure times, operators, journey durations and prices are shown on each route page. Compare options for ferries and transfers from Phuket, or browse other destinations across Thailand to find an alternative connection if your sailing is affected.
Disclaimer: Weather, sea conditions, and tide information are subject to change. Always check local updates and forecasts before planning activities. This forecast covers the Andaman Sea region as a whole and is not a substitute for an operator's own sailing decision.
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