Andaman Sea forecast: what changed this week
The Phuket and Andaman Sea forecast for May 12–18, 2025 shows a week of two halves: unsettled, stormy conditions early on, easing into calmer seas by the weekend. Temperatures stay warm throughout, between 29°C and 32°C, but wave heights swing from rough to near-flat, which is the figure that matters most if you are travelling by boat.
Weather Forecast for the Andaman Sea Region, Thailand. May 12-18, 2025.
- Monday, May 12 — Temperature: 30°C. Weather: Scattered thunderstorms. Wave Height: 1.5–2.0 meters. Tide: High tide at 04:20 AM, low tide at 10:45 AM.
- Tuesday, May 13 — Temperature: 31°C. Weather: Morning sun, afternoon showers. Wave Height: 1.0–1.5 meters. Tide: High tide at 05:00 AM, low tide at 11:30 AM.
- Wednesday, May 14 — Temperature: 29°C. Weather: Heavy rain and thunderstorms. Wave Height: 2.0–3.0 meters (rough seas). Tide: High tide at 05:45 AM, low tide at 12:15 PM.
- Thursday, May 15 — Temperature: 30°C. Weather: Cloudy with light showers. Wave Height: 1.5–2.0 meters. Tide: High tide at 06:30 AM, low tide at 01:00 PM.
- Friday, May 16 — Temperature: 31°C. Weather: Sunny spells, late rain. Wave Height: 1.0–1.5 meters. Tide: High tide at 07:15 AM, low tide at 01:50 PM.
- Saturday, May 17 — Temperature: 32°C. Weather: Mostly sunny. Wave Height: 0.5–1.0 meters (ideal for sailing). Tide: High tide at 08:00 AM, low tide at 02:45 PM.
- Sunday, May 18 — Temperature: 31°C. Weather: Light showers. Wave Height: 1.0 meter. Tide: High tide at 09:00 AM, low tide at 03:40 PM.
Who this affects
Anyone crossing the Andaman Sea this week should read the wave column first. Wednesday, May 14 is the day to watch: heavy rain and thunderstorms with rough seas of 2.0–3.0 meters. That is the kind of swell that leads operators to cancel or delay sailings, and it makes for an uncomfortable crossing even when boats do run.
Land services are affected differently. Buses, minivans and private transfers are not stopped by swell, so they often remain the more dependable option on stormy days — though heavy rain can still slow road journeys.
Practical impact for travellers
Plan the sensitive parts of your trip around the calm end of the week. Saturday, May 17 is the standout, with mostly sunny skies and 0.5–1.0 meter seas described as ideal for sailing; Sunday, May 18 stays gentle at around 1.0 meter despite light showers.
Tide times shift roughly 45 minutes later each day across the week, from a 04:20 AM high tide on Monday to 09:00 AM on Sunday. At smaller piers and beach landings, low tide can affect boarding, so check the day's timings against your departure.
If you have a flight to catch, leave a buffer after any sea crossing early in the week, and consider a land transfer as a backup.
Book around the weather
Compare departure times, operators and prices for your dates before you commit — live availability shows what is actually running. Browse ferries and transfers from Phuket or check connections to nearby Andaman Sea destinations to find a routing that suits the conditions.
Disclaimer: Weather, sea conditions, and tide information are subject to change. Always check local updates and forecasts before planning activities.
Search availability for your travel dates and book your Andaman Sea crossing or transfer now.
