Vietnam is roughly 1,650km north to south - further than Auckland to Cairns - which is the one thing most first-time itineraries get wrong. There is no single 'best time to visit Vietnam,' because Hanoi, Hoi An, and Ho Chi Minh City are effectively three different climates running on three different calendars. A trip planned around a single weather forecast for 'Vietnam' will get at least one region wrong.
The trade-off I talk clients through: cover the whole country in 12–14 days and you'll spend a lot of that time in transit or exhausted; pick two regions in 7–10 days and you'll actually rest. North plus central (Hanoi/Ha Long Bay/Sapa plus Hoi An/Hue) is the classic combination and pairs well with a first trip. Adding the south for the Mekong Delta and Ho Chi Minh City works better as a second visit, or if you've got two full weeks and don't mind a fuller pace.
Domestic flights between Hanoi, Da Nang, and Ho Chi Minh City are cheap and frequent - I'd rather see clients fly one leg and bank the saved day for Hoi An than grind out the full overland route just to say they did it. The exception is the overnight sleeper train from Hanoi to Sapa, which is worth doing for its own sake if you book a private cabin rather than a shared berth.
When to go, region by region
Typical monthly patterns based on long-run averages and how busy each season tends to get with visitors — treat it as a planning guide, not a forecast, and always check closer to your travel dates.
Northern Vietnam - Hanoi, Ha Long Bay, Sapa
Jan
20°/13°
18mm
Feb
21°/14°
27mm
Mar
24°/17°
44mm
Apr
28°/21°
90mm
May
32°/24°
188mm
Jun
33°/26°
240mm
Jul
33°/26°
288mm
Aug
32°/26°
318mm
Sep
31°/24°
254mm
Oct
28°/21°
137mm
Nov
25°/18°
43mm
Dec
21°/14°
20mm
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Central Vietnam - Hoi An, Da Nang, Hue
Jan
24°/19°
100mm
Feb
26°/20°
38mm
Mar
28°/21°
32mm
Apr
31°/23°
30mm
May
33°/25°
60mm
Jun
34°/26°
80mm
Jul
34°/26°
90mm
Aug
33°/26°
110mm
Sep
31°/24°
340mm
Oct
29°/23°
530mm
Nov
27°/21°
380mm
Dec
25°/20°
180mm
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Southern Vietnam - Ho Chi Minh City, Mekong Delta
Jan
32°/21°
14mm
Feb
33°/22°
4mm
Mar
34°/24°
12mm
Apr
35°/25°
42mm
May
34°/25°
218mm
Jun
32°/24°
311mm
Jul
32°/24°
293mm
Aug
31°/24°
269mm
Sep
31°/24°
327mm
Oct
31°/24°
266mm
Nov
31°/23°
116mm
Dec
31°/22°
48mm
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Things worth building a trip around
Ha Long Bay
Nearly 2,000 limestone karsts rising out of jade-green water, about 3.5 hours from Hanoi. Most people book a day trip, which mainly means a crowded tour boat and a couple of hours actually on the water.
Book a 2-night boat instead of a day trip - the overnight routes reach Lan Ha Bay and the quieter southern karsts that day-trippers never see.
Sapa rice terraces
Terraced rice paddies climbing the hills around Fansipan, Indochina's highest peak, and a base for trekking through Hmong and Dao villages. Best photographed just before the June rains or after the September harvest.
Hire a local guide from one of the surrounding villages rather than a Hanoi-based tour company - the walk is the same, but the money and the context land differently.
Hanoi Old Quarter
Thirty-six streets, each historically named for the trade sold on it, now a tangle of street food stalls, egg coffee shops, and motorbikes. It rewards wandering more than a checklist.
Eat at the plastic-stool places with one item on the menu and a queue of locals, not the ones with laminated multilingual menus.
Hoi An Ancient Town
A UNESCO-listed trading port frozen somewhere around the 18th century, lit by silk lanterns every evening. Also the country’s tailoring capital - a custom suit or dress can be fitted and finished in 48 hours.
Rent a bicycle and ride out to An Bang Beach or the rice paddies at Tra Que - the old town itself is a 20-minute walk end to end and gets crowded by mid-morning.
Hue Imperial City
The walled Citadel and royal tombs of the Nguyen Dynasty, Vietnam's last imperial court. Quieter and less polished than Hoi An, which is part of the appeal.
Combine it with the old DMZ sites further north if military history matters to your clients - Hue is the natural overnight stop between Hanoi and Hoi An either way.
Mekong Delta floating markets
A maze of rivers, canals, and floating markets south-west of Ho Chi Minh City, where boats trade produce hung from tall poles so buyers can spot the cargo from a distance.
Stay a night in a homestay rather than doing it as a day trip from Ho Chi Minh City - the markets are genuinely a dawn activity, and the day-trip buses arrive after the best of it is over.
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