Da Nang rainy season: September to December month by month, what closes in a storm and how Hoi An floods

Your flight to Da Nang (Đà Nẵng) lands in October, your nights in Hoi An (Hội An) are booked for early November, and the Da Nang rainy season is the one part of the plan you cannot control. Will it pour all day, and what happens to flights, boats and the old town if a typhoon or a flood arrives while you are there?

September to December, month by month

If you are deciding how much rain to plan for, start with the averages for your month. In the Da Nang rainy season, October is the wettest month, averaging 628 mm of rain on about 20 rainy days at the city's weather station. The city government says September to December together bring more than 70% of the year's rain.

The table gives the station's long-term averages from Vietnam's national climate data regulation (QCVN 02:2022/BXD), with average relative humidity.

December gets about half of November's rain but almost as many rainy days, the most humid air of the four months and the least sunshine: 94.8 hours in an average December, against 143.4 hours in October.

The averages are a guide, not a forecast. Rain measured at the same station from 2022 to 2025 came in above the long-term average in almost every month of the season:

• September: 419.4 mm in 2022, 456.5 mm in 2023, 370.0 mm in 2024 and 529.0 mm in 2025 (average 351 mm).
• October: 1,219.6 mm, 1,836.2 mm, 681.7 mm and 994.1 mm (average 628 mm).
• November: 156.6 mm, 742.0 mm, 608.9 mm and 530.0 mm (average 448 mm).
• December: 349.7 mm, 317.2 mm, 443.8 mm and 249.1 mm (average 218 mm).

Fifteen of those 16 months beat their average; the exception was November 2022. If you are choosing between November and December, December is drier on average, but in 2022 it got more than twice as much rain as November.

Does it rain all day, or in short bursts?

If you are planning beach mornings or long walks, how the rain falls matters as much as how much. The Da Nang rainy season brings both short downpours that clear within hours and spells of heavy rain that last for days, as 2025 showed.

On the evening of September 10, 2025, about 30 minutes of heavy rain flooded streets in the city center, in places nearly half a meter deep, and the water had drained by about 8 pm. In late October, one gauge, at Phuoc Thanh (Phước Thành), recorded 1,199 mm from the evening of October 25 to the morning of October 29. By October 30, 29 of the city's 94 communes and wards had been flooded for three to five days.

The station averages count rainy days, not hours of rain, so they cannot say which kind your trip will get. They do show rain on about two days in three in October and November, and sunshine in every month: about 4.6 hours a day in an average October and about 3 hours a day in December.

Ba Na Hills, the mountain resort run by Sun World, has its own pattern. Sun World describes October to February as its rainy and coldest period, often cloudy and humid, with fog and long spells of light rain.

What closes when a typhoon comes, and who orders it

If a storm is forecast while you are in Da Nang, expect closures from several bodies, each on its own timetable. The aviation authority decides on the airport, the city's border guard command on boats at sea, the Son Tra Peninsula (Sơn Trà) board on the peninsula, and the railway on trains.

The airport

The Civil Aviation Authority of Vietnam (Cục Hàng không Việt Nam) decides when an airport stops receiving aircraft. For Typhoon Trami, it ordered operations at Da Nang airport suspended from 6 am on October 27 to 4 am on October 28, 2024. During Typhoon Bualoi, the airport stopped receiving aircraft from 6 am to 11 am on September 28, 2025, and that afternoon more than 30 flights at the domestic terminal were announced as delayed between 4:30 pm and 6:30 pm.

Not every typhoon shuts it. During Typhoon Kalmaegi on November 6, 2025, the authority's notice suspended six airports, including Chu Lai, which is also in Da Nang city, but Da Nang airport was not among them. For terminals and getting into town once flights resume, see the Da Nang airport guide.

The sea, islands and rivers

Closing the sea is the job of the city's border guard command. The city's storm dispatches in September, October and November 2025 each told it to restrict boats or close the sea when needed, depending on how the storm developed. On September 27, 2025, for Typhoon Bualoi, it fired storm flares and closed the sea until the storm was over.

Boats to the Cham Islands (Cù Lao Chàm) can be stopped too. In September 2024, during a tropical depression, the then Hoi An city government stopped taking visitors to the islands and told the boats to suspend service. In April 2026 the head of Tan Hiep commune, which covers the islands, said rough seas sometimes send visitors back to the mainland a few hours after they go out.

Water sports stop as well. Big waves and strong wind halted swimming, paddleboarding, paragliding and all other water sports on the coast in late October 2025. Before Storm Fengshen that month, the city's inland waterway port authority and wharf operators moved all tourist boats on the Han River (sông Hàn) to a storm shelter.

Son Tra Peninsula and Ba Na Hills

The board that manages Son Tra Peninsula and the city's beaches closes the peninsula itself. It suspended sightseeing from 1:00 pm on September 27, 2025 for Typhoon Bualoi and reopened on September 30. It stopped receiving visitors again from November 3 ahead of Typhoon Kalmaegi; by November 5 heavy rain had caused at least four landslides on the road up, and two routes reopened at 7:30 am on November 8. Opening hours and routes are in the Son Tra Peninsula guide.

Safety note: the Son Tra board asks visitors not to enter the peninsula while visits are suspended. It also asks them to limit travel in heavy rain, strong wind or thick fog, especially on steep passes, by streams and where landslides may happen, and to stay away from rocks and the shore when waves are big.

Sun World's ticket terms for Ba Na Hills say the resort may close, postpone or suspend operations because of force majeure, which includes natural disasters and weather. Refunds, extensions or changes then follow Sun World's policy at the time. The Ba Na Hills tickets guide covers what a ticket includes.

Trains

The railway stops trains for storms and when the line floods. It announced that the Hue–Da Nang heritage trains would not run on October 23–24, 2025 because of Storm Fengshen, and again on October 28–29 because of flooding in Hue and Da Nang. Tickets for October 23–24 could be refunded free at stations within 30 days of the date on the ticket. The North–South line through Hue city was closed from 4 pm on October 27, when water rose over the rails, until 5 am on October 31, 2025. Timetables are in the Da Nang to Hue train guide.

How Hoi An's old town flooded in 2025

If you are booked into Hoi An's old town for October or November, the 2025 season shows what a bad year looks like. VnExpress reported in October 2025 that the old town floods three or four times a year, usually for only two or three days. In 2025 riverside Bach Dang Street (Bạch Đằng) was under water on October 22, from October 26 until November 8, and again from the night of November 15 to at least November 21. On October 30 the Thu Bon River (sông Thu Bồn) at Hoi An reached about 3.4 m, the level of its 1964 record.

How the season unfolded in the old town:

• October 21–22: parts of the old town flooded from the evening of October 21. On October 22, Bach Dang Street, along the Hoai River (sông Hoài), was under about 0.5 m at its deepest, and many Hoai River boat operators stopped taking guests on their own.
• October 26–27: the river spilled onto Bach Dang on the afternoon of October 26. By October 27 the riverside was under nearly 2 m of water, foreign visitors were taken out of flooded hotels and homestays by boat, and old town events were paused from noon.
• October 30: the flood peaked in the early hours. At Cau Lau (Câu Lâu) station the Thu Bon reached 5.62 m at 2 am, above its 1964 record of 5.48 m.
• November 1–3: shops in the center began reopening at noon on November 1, though the ticket booths were still shut and Bach Dang Street was still under about 0.5 m that afternoon. The water rose again on November 3.
• November 7–8: the ticket booths and the state and private heritage sites reopened on November 7, according to the Hoi An World Cultural Heritage Conservation Center, and Bach Dang Street was fully dry on November 8.
• November 15–18: the river came over Bach Dang from the night of November 15. On November 18, with riverside streets under 1.2–1.5 m, the old town stopped selling sightseeing tickets and many heritage sites closed.
• November 21–22: the water had mostly gone by the afternoon of November 21, but ticket sales had not restarted on November 22.

Flood warnings for Hoi An use the official alarm levels in the Prime Minister's Decision 05/2020/QĐ-TTg. At Hoi An station on the Thu Bon, alarm level 1 is 1.0 m, level 2 is 1.5 m and level 3 is 2.0 m; at Cau Lau station they are 2.0, 3.0 and 4.0 m. Hoi An's official flood-warning website explains what each level means: at a forecast of 1.5–2.0 m it warns that ferries only run when necessary.

Safety note: when the official Hoi An flood website forecasts 2.0 m or more at Hoi An station, its advice includes "Turn off power", "Streets in flood zones will be closed" and "Do not go out to avoid accidents, especially children and the elderly."

The city government says floods usually come from September to November. December can still be wet: the Da Nang station recorded 443.8 mm in December 2024, about twice the month's average. For tickets and opening hours on dry days, see the Hoi An Ancient Town guide.

Where to follow warnings, and which are in English

Before and during your trip, this guide suggests following an official source as well as your weather app. Only some are in English:

• Hoi An flood-warning site, canhbaolu.danang.gov.vn: has an English version, with a 24-hour flood status banner for Hoi An and an explanation of each warning level. As of October 6, 2026, though, its Flood Bulletins page listed nothing newer than December 7, 2023; flood warnings are posted on the civil defense command's site below.
• Da Nang civil defense command, pctt.danang.gov.vn: in Vietnamese. It posts the flood warnings and heavy-rain forecasts of the Central Region Hydro-Meteorological Station.
• National Center for Hydro-Meteorological Forecasting, nchmf.gov.vn: storm and flood bulletins in Vietnamese; on October 6, 2026 the tropical cyclone page of its English site read "Updating data".
• Danang Smart City app: its App Store listing names English as one of the app's languages. The app and its website, muangap.danang.gov.vn (in Vietnamese), show rain data and a flood map, take rescue requests and list evacuation shelters.
• Danang Fantasticity, the city's tourism portal: posted English rain and flood warnings and a visitor advisory during Typhoon Kalmaegi, but as of October 6, 2026 its "Weather update" section held three posts, all from November 5, 2025.

The civil defense command also lists the 1022 hotline among its disaster information channels. For help as a visitor, the Da Nang Visitor Support Center's November 2025 storm advisory gave the hotline *8899 and +84 911 153 443 on Zalo, Viber or WhatsApp. In an emergency, call 112 for search and rescue or natural disasters, 113 for police, 114 for fire and rescue and 115 for an ambulance.

Lifeguards and swimming from October

If a beach day is on your list, check when lifeguards are on duty. From October 1, 2026 to March 14, 2027 they work their low-season schedule, according to the board that manages the beaches; as reported in May 2025, that schedule ran from 5:00 am to 6:30 pm. The city government says big waves usually come from September to March. The My Khe Beach guide covers where to swim safely.

Safety note: the beach board's advice is to follow lifeguards, watch for flags and whistles, and swim only inside areas marked with safety buoys. Beach rules reported in 2023 also say not to swim on bad-weather days or where a danger sign is posted.

How to book and plan around the rain

If your trip falls in October or November, the averages show rain on about two days in three, so this guide suggests planning it so that a lost day costs little. In early November 2025, two Vietnamese tour companies told VnExpress that 30–40% and 15–20% of customers on their central Vietnam tours had cancelled or postponed. In practice:

• Book rooms and flights you can change or cancel, above all for Hoi An nights from late October to late November, the weeks the old town flooded in 2025.
• If you stay near the Hoai River, ask the hotel before booking how it handled the 2025 floods, since guests in flooded hotels and homestays were moved out by boat.
• Keep beach, Ba Na Hills, Son Tra and Cham Islands days movable, and put them early in the trip so there is room to shift them.
• Check your transport the day before you travel. During the October 2025 floods, hotels in Hoi An reminded guests to confirm departure times with their transport operators.
• Have an indoor plan for wet days, such as the Museum of Cham Sculpture. The Da Nang Museum (Bảo tàng Đà Nẵng), at 31 Tran Phu Street, is another; its website lists it as open from 8:00 am to 5:00 pm daily.

If you are still choosing between months, the best time to visit Da Nang guide compares all twelve.

Sources and how we checked

We used the long-term averages for the Da Nang weather station in QCVN 02:2022/BXD, rain measured at the same station from Vietnam's statistical yearbooks, the city government's storm dispatches and notices, the aviation authority's notice, Decision 05/2020/QĐ-TTg for flood alarm levels, the official warning websites and dated news reports for each closure and flood, checked on October 1–6, 2026. The regulation states neither the period of its data nor the minimum rain that counts as a rainy day; a 2026 draft amendment note says its data run to 2017. Sunshine per day is the monthly total divided by the days in the month. Reports differ on whether Hoi An station passed its 1964 record of 3.4 m on October 30, 2025. Tuoi Tre gave 3.39 m at 2 am, 1 cm below the record, and then 3.4 m, equal to it, in a 3:30 am bulletin; Dan Tri, citing data from the Central Region Hydro-Meteorological Station, wrote that the river at both Cau Lau and Hoi An went above the 1964 level that morning, and gave 3.32 m at Hoi An at 7 am as the river fell. The guide therefore gives about 3.4 m. We found no dated notice of the Ba Na Hills cable car stopping for a storm in 2024–2025, no 2025 order stopping Cham Islands boats, no date when Hoi An's ticket sales resumed after the November 2025 flood, no report of the old town flooding in December 2023–2025, no statement on whether the 1022 hotline answers in English, and no lifeguard hours for the 2026–2027 low season.

• Ministry of Construction, QCVN 02:2022/BXD (archived copy, in Vietnamese), issued with Circular 02/2022/TT-BXD of September 26, 2022, Appendix A, Da Nang station: rain, rainy days, highs and lows, humidity and sunshine; Vietnam Institute for Building Science and Technology, 2026 draft amendment note (in Vietnamese).
• Vietnam's statistics office (Cục Thống kê, Ministry of Finance), Statistical Yearbooks 2025, 2024, 2023 and 2022: monthly rain at Da Nang station.
• Da Nang City Government (in Vietnamese): climate characteristics and impacts of natural disasters (May 4, 2026); storm dispatches for Typhoon Bualoi (September 27, 2025), Storm Fengshen (October 21, 2025) and Storm No. 15 (November 28, 2025); sea closure for Bualoi (September 27, 2025); airport closure on September 28 (September 29, 2025); Son Tra reopening (November 8, 2025); Cham Islands boats (April 19, 2026); disaster information channels (September 11, 2026); lifeguard low season (October 3, 2026).
• Civil Aviation Authority of Vietnam, six airports suspended for Typhoon Kalmaegi (November 6, 2025, in Vietnamese).
• Prime Minister's Decision 05/2020/QĐ-TTg on flood alarm levels (January 31, 2020, in Vietnamese); Da Nang civil defense command, hydrology data (in Vietnamese); National Center for Hydro-Meteorological Forecasting, emergency flood bulletin of 3:30 am, October 30, 2025 (in Vietnamese).
• Official warning sites: Hoi An flood forecasting and warning system, its explanation of warning levels and its Flood Bulletins page; Da Nang civil defense command weather and disaster news (in Vietnamese); National Center for Hydro-Meteorological Forecasting, Vietnamese site and English site; Danang Smart City on the App Store.
• Danang Fantasticity: Advisory for visitors in Da Nang (November 6, 2025); Weather update section.
• Sun World Ba Na Hills (in Vietnamese): ticket terms and conditions; Ba Na Hills weather by season (September 21, 2026).
• VnExpress (in Vietnamese): city streets flooded on September 10, 2025; Thu Bon above its 1964 record (October 30, 2025); rain at Phuoc Thanh (October 29, 2025); Hoi An on October 22, October 26, October 27, November 1, November 3, November 16, November 18 and November 22, 2025; old town floods three or four times a year (October 31, 2025); hotels reminding guests to check transport (October 27, 2025); Chu Lai airport in Da Nang (September 27, 2025); Storm Fengshen and tourism (October 22, 2025); tour cancellations (November 5, 2025); Son Tra landslides (November 5, 2025); heritage trains suspended (October 23, 2025); railway through Hue reopened (October 31, 2025).
• Tuoi Tre (in Vietnamese): airports closed for Typhoon Trami (October 26, 2024); delays at Da Nang airport (September 28, 2025); Thu Bon at Cau Lau and Hoi An at 2 am (October 30, 2025); Hoi An at 3.4 m in the 3:30 am bulletin (October 30, 2025); shops reopening (November 1, 2025); ticket booths reopened (November 7, 2025); emergency numbers (April 17, 2026). Dan Tri, Hoi An on October 30, 2025 (in Vietnamese).
• Van Hoa newspaper (in Vietnamese): Cham Islands boats suspended (September 20, 2024); water sports halted (October 31, 2025); Son Tra closed for Bualoi (September 27, 2025) and reopened (September 30, 2025); lifeguard schedules (May 18, 2025). Bao Lao Cai, heritage trains stopped by floods (October 27, 2025). Nhan Dan, beach safety rules (April 12, 2023). Tuoi Tre News, beach board advice (April 28, 2026, in English).
• Da Nang Museum, visitor information (December 30, 2025, in Vietnamese).
• Photos: Da Nang city portal, rain, floods and landslides on the morning of October 28 (October 28, 2025) and exploring Son Tra responsibly (September 20, 2026), both in Vietnamese; Da Nang Museum, second-floor galleries (January 26, 2026, in Vietnamese).

Updated: October 8, 2026