What is the weather like in Hoi An in September?

Expect temperatures between 25°C and 30°C with 61% average rain probability and about 8 hours of sunshine daily.

What is the weather like in Hoi An in September?

Hoi An in September scores 48/100 based on 30 years of climate data. Requires preparation but many visit successfully.

Who should visit Hoi An in September?

September in Hoi An is ideal for: Business travelers.

Hoi An Weather in September | 30-Year Forecast

Avg High

30°C

Hottest around day 1

Avg Low

25°C

Coolest around day 29

Rainy Days

30days

61% avg rain chance

Sunshine

8hrs/day

Autumn season

Sea Temperature in September

South China Sea(Biển Đông)

30.6°C

Monthly Average

Water Feel

🌴Tropical

Perfect for swimming and water sports

Swim Rating

✅Excellent for swimming

Based on average sea surface temperature

Body of Water

South China Sea

Biển Đông

Hoi An coastline

Essential Travel Info for Hoi An

🗓️ Best Time to Visit 📖 Travel Guide 🍴 Food Guide

Currency

VND

₫ Vietnamese đồng

Language

Vietnamese

Driving

Right side

Connect

Most hotels, restaurants and cafés have ...

Safety

High Safety

GPI: 1.786

Travel Intelligence

Exclusive flight analytics & health data for Hoi An

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Moderate

45/ 100

Traffic Index

Balanced traffic

Peak Daily Arrivals

slots per day

Peak

Jul

Low

Nov

Monthly Traffic Distribution

129

Jan

143

Feb

137

Mar

127

Apr

127

May

146

Jun

151

Jul

144

Aug

118

Sep

115

Oct

109

Nov

115

Dec

Traffic Level

Low Season

Key Connections

Ho Chi Minh City Tan Son Nhat (SGN)

Hanoi Noi Bai (HAN)

Seoul Incheon (ICN)

Busan-si Gimhae (PUS)

Kuala Lumpur (KUL)

Health & Safety Advisory

CDC travel health recommendations

10 Recommendations

COVID-19

All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.

Chikungunya

All travelers should take steps to prevent mosquito bites. Chikungunya vaccination is generally not recommended. Travelers who wish to consider vaccination can visit “What to consider before traveling” on thechikungunya vaccinespage to learn more.

Hepatitis A

Recommended for unvaccinated travelers one year old or older going to Vietnam.Infants 6 to 11 months old should also be vaccinated against Hepatitis A. The dose does not count toward the routine 2-dose series.Travelers allergic to a vaccine component should receive a single dose of immune globulin, which provides effective protection for up to 2 months depending on dosage given.Unvaccinated travelers who are over 40 years old, are immunocompromised, or have chronic medical conditions planning to depart to a risk area in less than 2 weeks should get the initial dose of vaccine and at the same appointment receive immune globulin.

Hepatitis B

Recommended for unvaccinated travelers of all ages traveling to Vietnam.

Japanese Encephalitis

Recommended for travelers whoAre moving to an area with Japanese encephalitis to liveSpend long periods of time, such as a month or more, in areas with Japanese encephalitisFrequently travel to areas with Japanese encephalitisConsider vaccination for travelersSpending less than a month in areas with Japanese encephalitis but will be doing activities that increase risk of infection, such as visiting rural areas, hiking or camping, or staying in places without air conditioning, screens, or bed netsGoing to areas with Japanese encephalitis who are uncertain of their activities or how long they will be thereNot recommended for travelers planning short-term travel to urban areas or travel to areas with no clear Japanese encephalitis season.

Malaria

CDC recommends that travelers going to certain areas of Vietnam take prescription medicine to prevent malaria. Depending on the medicine you take, you will need to start taking this medicine multiple days before your trip, as well as during and after your trip. Talk to your doctor about which malaria medication you should take.Transmission areasRural areas only; rare cases in the Mekong and Red River DeltasNone in the cities of Da Nang, Hai Phong, Hanoi, Ho Chi Minh City (Saigon), Nha Trang, and Quy NhonDrug resistanceChloroquine and mefloquineSpeciesP. vivax(55%)P. falciparum(44%)P. knowlesi,6P. malariae, andP. ovale(rare)Recommended chemoprophylaxisProvinces of Bình Dương, Bình Phước, Đắk Lắk, Đắk Nông, Gia Lai, Khánh Hòa, Kon Tum, Lâm Đồng, Ninh Thuận, Tây Ninh: Atovaquone-proguanil, doxycycline, tafenoquine2All other areas with malaria transmission (except Mekong and Red River Deltas): Atovaquone-proguanil, doxycycline, mefloquine, tafenoquine2Mekong and Red River Deltas: No chemoprophylaxis recommended (insect bite precautions and mosquito avoidance only)4Updated April 23, 2025See footnotes

+4 more

Source: CDC Travelers' Health

View Complete Health Guide

Is September a Good Time to Visit Hoi An?

🤔Requires preparation but many visit successfully(48/100)

Short Answer

Storm season alert for Hoi An in September: beyond the 31°C, 61% rain averages, hurricane risk requires travel insurance and schedule flexibility.

Decision Factors

Typhoon season active

Western Pacific zone - expect potential typhoon activity

Oppressive heat and humidity

30.5°C with 83% humidity - challenging conditions

High rainfall period

61% rain probability, 6.8mm average

Vaccinations required

Yellow Fever

Feels significantly hotter than 30.5°C

Heat index: 40°C due to 83% humidity

Warm tropical seas

30.6°C sea temperature - Hot Soup

Good For

💼
Business travelers
Climate-controlled meetings unaffected by weather

Who Should Avoid

👨‍👩‍👧‍👦
Families with children
40°C heat index dangerous for children
👴
Elderly travelers
Heat index of 40°C poses health risks
🥾
Outdoor enthusiasts
61% rain probability disrupts outdoor activities
📸
Photographers
78% cloud cover limits natural light opportunities

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Hoi An in September averages 30°C with 61% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Hoi An in September

What are the temperatures in Hoi An in September?

Daytime highs average 30°C, nights drop to 25°C. Temperatures remain fairly consistent.

How many rainy days in Hoi An in September?

Expect around 30 days with measurable rainfall. Definitely pack rain gear.

What to wear in Hoi An in September?

Light, breathable fabrics. Don't forget sunglasses and a hat.

Is September peak season in Hoi An?

This is off-peak season. Expect lower prices and fewer crowds.

Hoi An Weather in September