12 months: calm sea and rain
This is reference statistics from past years, not a forecast or official data. For the coming days, see the “Nha Trang Now” page and the Vietnam national hydrometeorological service (nchmf.gov.vn).
My travel dates
Choose your arrival and departure - we show how many days of calm sea there usually are on those dates. If your dates are within the next 16 days, we add the real forecast.
Choose a month
Table by month
| Month | Calm sea, % of days | Rain ≥5 mm, % of days | Rain, mm/day | Sun, hours | Day / night, °C | Sea, °C |
|---|---|---|---|---|---|---|
| January | 34% | 8% | 2.1 | 5.8 | 27 / 22 | 24.6 |
| February | 50% | 4% | 0.6 | 7.5 | 28 / 22 | 25.2 |
| March | 72% | 6% | 1.5 | 8.3 | 30 / 24 | 26.1 |
| April | 93% | 8% | 2.0 | 8.6 | 31 / 25 | 27.6 |
| May | 99% | 16% | 3.3 | 8.4 | 32 / 26 | 30.0 |
| June | 99% | 8% | 1.5 | 7.8 | 33 / 26 | 29.7 |
| July | 100% | 10% | 1.8 | 7.9 | 33 / 26 | 28.8 |
| August | 99% | 12% | 2.2 | 7.6 | 33 / 26 | 28.8 |
| September | 99% | 23% | 6.1 | 6.8 | 32 / 26 | 29.8 |
| October | 88% | 31% | 10.6 | 5.9 | 30 / 25 | 29.4 |
| November | 51% | 33% | 14.9 | 4.7 | 29 / 24 | 27.8 |
| December | 19% | 24% | 8.2 | 4.4 | 28 / 23 | 26.2 |
Rain and air temperature: Nha Trang weather station (WMO 48877, NOAA GHCN-Daily), 2000-2025, 26 years. Waves and sea temperature: Open-Meteo Marine model, data since 10.2021, 5 years. Sunshine hours: Vietnam standard QCVN 02:2022/BXD. A ±7-day window around each date, all years pooled.
Frequently asked questions
What is the best time to visit Nha Trang for calm seas?
According to the Open-Meteo Marine model (5 years), the share of days with waves of 1 m or less reaches at least 95% in these months: May, June, July, August, September. These are statistics from past years, not a forecast.
When is the sea roughest in Nha Trang?
The sea is least often calm in December (19% calm days) and January (34%). Based on 5 years of data.
When is the rainy season in Nha Trang?
According to the Nha Trang weather station (26 years), rain of 5 mm or more is most common in these months: November (33% of days), October (31% of days), December (24% of days).
Rain and air temperature: Nha Trang weather station (WMO 48877, NOAA GHCN-Daily), 2000-2025, 26 years. Waves and sea temperature: Open-Meteo Marine model, data since 10.2021, 5 years. Sunshine hours: Vietnam standard QCVN 02:2022/BXD. A ±7-day window around each date, all years pooled.