Vietnam Weather in September 2025: Travel Smart in Rain

September is a rainy month across Vietnam, but rainfall patterns vary by region.

In Northern Vietnam, it's the tail end of the hot and humid rainy season, with drier and cooler weather gradually setting in.

Central Vietnam sees increasing rainfall as it heads into the storm season. Meanwhile, Southern Vietnam is at its peak in its rainy season.

The good news? The rain brings relief from the summer heat. Across most regions, average daytime highs drop to a more comfortable 31°C (88°F).

So… is September still worth visiting?

Yes — if you go north, especially in late September.
No — if you're hoping for sunny beach days.

September may be underrated, but it's highly rewarding for travelers who don't mind a bit of rain in exchange for fewer crowds, golden harvest views, and vibrant local festivals.

Is Vietnam in September Right for You?

Hanoi & Northern Vietnam in September: Your Best Pick

• Hanoi, Halong Bay, Ninh Binh, Sapa, Ha Giang

In Northern Vietnam, the rain starts to ease up in September, especially later in the month. You'll get around 16 to 18 dry days, and the temperature stays warm at around 30°C (86°F). It's the start of autumn, with fresher air and clearer skies, especially in the Northern Highlands.

Hanoi feels festive and peaceful. On September 2nd, Vietnam's National Day brings parades and patriotic celebrations to Ba Dinh Square. Later in the month, the Mid-Autumn Festival lights up the Old Quarter with glowing lanterns, lion dances, and a magical atmosphere for evening strolls.

Halong Bay can be a hit-or-miss due to occasional typhoons, so it's wise to keep a Plan B. A great alternative? Ninh Binh. You can cruise through golden rice fields and dramatic karst peaks with far fewer tourists.

If you're up for a soft adventure, head to Sapa or Mu Cang Chai. Beyond the cooler and drier weather, the golden rice terraces in harvest season create views you'll never forget — especially if it's your first time in Asia.

Da Nang & Central Vietnam in September: Monsoon Starts

• Da Nang, Hoi An, Nha Trang, Hue, Quy Nhon

September marks the start of the rainy season in Central Vietnam, with 14–16 wet days and an increased chance of typhoons. Rainfall nearly doubles compared to August, and stormy seas and rain showers are common, so beach time may be limited.

Da Nang and nearby beaches face more weather-related interruptions, with rougher seas and less sun. Further south, Nha Trang still offers decent diving, especially with fewer tourists. But for clear skies and calm beaches, it's best to consider Bali or Koh Samui instead.

But if you're not chasing the sun, this region still shines in its own way. Hoi An, in particular, is perfect for a slower-paced trip. You can explore ancient sites like My Son Sanctuary, take a cooking class, shop at local markets, or get something tailored — all great even on rainy afternoons.

The town's signature Mid-Autumn Festival adds a festive glow with lantern-lit streets, lion dances, and riverside candle boats.

Ho Chi Minh & Southern Vietnam in September: Peak Rainfall Continues

• Ho Chi Minh City, Mekong Delta, Phu Quoc, Con Dao

September is one of the wettest months in Southern Vietnam, with almost daily afternoon downpours and humidity over 83%. The heavy rain may flood streets and cause traffic jams, so afternoons are best for indoor activities.

But don't let that discourage you. In Ho Chi Minh City, you can visit iconic spots like the War Remnants Museum or the Saigon Notre-Dame Basilica. The Mid-Autumn Festival lights up Lantern Street with vibrant displays and lion dances.

The Mekong Delta remains lush and full of life despite the high water levels and frequent showers. However, boat trips may be affected, including Mekong River cruises to Cambodia, so plan accordingly.

If you're hoping for some beach time, Phu Quoc and Con Dao are a bit too stormy this month.

Crowds and Costs

September is in the low season, as Vietnamese students go back to school after their summer holidays, and beaches are less popular due to the increase in rainy days. Thus, you can enjoy more tranquility at the attractions, with no long queues.

Likewise, flights and hotels are at their lowest in September. You can visit Vietnam on a lower budget.

What to Wear in September

• Sun protection: sunscreen, hat, sunglasses
• Waterproofs: rain jacket or raincoat, umbrella, rubber boots… suiting the temperature
• Light, quick-drying wear for humid days
• Layers of clothing, maybe a hoodie, for the cooler evenings in Northern Vietnam
• Comfortable walking shoes
• Insect repellent if hiking activities are arranged.

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