Best Month for Island Hopping and Sea Conditions

The best months for island hopping in Phu Quoc are November to April, when the dry season brings calm seas and clear water. The dry season is also the peak tourist season, so book early. From May to October the rainy season brings heavy rain, peaking in August and September, and rough seas can stop boat trips. Check the forecast before you book.

Which months have the calmest sea?

The dry season, from November to April, is widely considered the best time to visit Phu Quoc. In that window the seas are calm and clear, which suits swimming, snorkelling and diving. February is the driest month, and rainfall is minimal across most of the dry season.

Average temperatures in the dry season range from 25 to 30 degrees, with April and May the hottest months. Because the dry season is the peak tourist season, flights, rooms and popular boat dates fill faster. Book early if your dates are fixed.

Do boat tours run in the rainy season?

Yes, tours can run in the rainy season, but they may be cancelled when the sea is rough. Rain often comes in short, heavy bursts in the afternoon or evening, which leaves dry hours during the day. Mornings and early afternoons are usually dry, so a morning departure gives your trip the best chance to go ahead.

The rainy season is the low season, with fewer crowds and lower prices on flights and accommodation. That makes it a practical time for travellers with flexible dates, as long as they accept that a boat trip can be changed or cancelled at short notice.

How does wind affect speedboat trips from An Thoi?

Wind and waves decide the route more than rain does. Occasional rough seas affect boat trips, particularly to smaller islands. The western side of the island is rougher in the rainy season, while the eastern beaches, such as Sao Beach, are more sheltered and calmer during the same months.

When wind is strong, operators may skip islands, adjust snorkelling spots or shorten the itinerary. If the weather is bad, some islands are replaced by other islands, so the boat may still leave with a different route. Speedboats can feel bumpy when the sea is not calm, which matters for people with back problems or strong seasickness.

The An Thoi archipelago in the south is a popular spot for exploring coral reefs. Water around the An Thoi Islands is often clearer than many mainland beaches, especially in the dry season, which is why the south is a favourite for snorkelling trips when the sea is calm.

What is the monsoon like, month by month?

The rainy season runs from May to October under the southwest monsoon. June to September brings unpredictable weather, rough seas and poor underwater visibility. August and September are the wettest months of the year, so these are the months with the most risk for a fixed boat date.

Conditions depend on the weather, the season, the waves and the visibility, and there is no single rule that holds for every day. Rainfall is minimal in the dry season, which is why most travellers plan their island days from November to April. If your trip falls in June to September, ask the operator for a fallback date in writing.

How do you check conditions before the day?

During the May to October rainy season, check the weather one to two days ahead. Travellers should also monitor weather forecasts, monsoon patterns and tide levels a few days before the trip. Provincial tourism authorities advised coastal areas to monitor the weather and warn tourism businesses early, so ask the operator how they will tell you about a change.

In July 2025 tropical storm Wipha brought heavy rain to coastal Phu Quoc and Kien Hai. Authorities urged operators to avoid taking tourists to areas with large waves during the storm, which is a good reminder to check the forecast before you book.

Checklist before the day:

• Check the forecast one to two days ahead in the rainy season.
• Ask whether the route will change if the sea is rough.
• Ask what happens to your payment if the trip is cancelled.
• Keep a second date or an indoor plan ready.

Use the rainy months for flexible plans rather than fixed ones. If your dates fall in May, June or October, book a trip that can move to another morning, and keep one spare day in your schedule. The usual pattern in the rainy season is showers in the afternoon and calmer mornings, so a morning departure is the normal choice. Wind matters more than rain for a boat, so a windy morning is a stronger reason to change plans than a light shower. Ask the operator in writing what they will do if the morning is cancelled, and whether a new date is offered.

What to do next

Read Clear Water Season for Snorkelling at Hon Mong Tay to plan the best months for the water. If a trip is cancelled at the pier, see If the Boat Is Cancelled at the Pier: Your Options. For a wet day, What to Do in Phu Quoc if It Rains: Boat Day Plan B has indoor ideas. Message us on WhatsApp with your dates, and we will confirm the sea outlook for your day in the chat before you pay.