Vietnam’s National Center for Hydro-Meteorological Forecasting (NCHMF) and the national civil-defence command flag moderate to heavy rain, locally torrential, with thunderstorms from evening 27 October through 29 October 2026 across Ha Tinh to Da Nang. Forecast totals are roughly 70–150 mm, locally over 300 mm, with short bursts that can exceed 100 mm in three hours. Disaster risk is listed at level 1, with the main concerns being urban flooding, flash floods and landslides.
What the forecast highlights
- Evening 27 Oct through night of 28 Oct: Ha Tinh–Da Nang commonly 50–100 mm, locally over 200 mm
- 29 Oct: still moderate to heavy rain in the same belt — commonly ~20–50 mm, locally over 100 mm
- Where travellers feel it: Hue, Hoi An and Da Nang; riverside low ground and hill roads are most exposed
- Thunderstorms may bring gusts, lightning and hail; authorities urge people not to cross flooded or fast-flowing stretches
Practical tips for Hong Kong travellers
- Hoi An Old Town: autumn river rises often wet low streets; skip night lantern boats and riverside walks if water is up, and don’t wade (sewage, debris, cables).
- Hue / countryside day trips: waterfalls and mountain roads can close; follow your operator if buses or private cars re-route.
- Da Nang: the city base usually stays usable, but beach time and outdoor spots such as Ba Na Hills may pause in strong wind/rain — keep malls and museums as backups.
- Flights & transfers: Hong Kong–Da Nang (DAD) may still operate with delays; pad airport–hotel transfers when roads slow.
- Stay flexible: prefer free-cancellation stays and activities; you needn’t cancel the whole trip, but don’t force peak outdoor hours in the heaviest rain.
- South has a separate tide watch: HCMC / Mekong also face higher flood risk around 28–29 Oct — see our related note.
Related pages
See Da Nang, Hoi An and Hue, plus transport & visas. For the southern tide watch, see HCMC high-tide alert.
This post is an original summary, not a full reprint of forecast or press copy. Rainfall figures are forecasts — treat local authorities and on-the-ground conditions as the source of truth.