In brief
In May in Nha Trang the sea is mostly calm: on 99% of days the highest wave of the day is 1 m or less. Rain of 5 mm or more falls on about 16% of days (3.3 mm a day on average), with about 8.4 hours of sun a day. Daytime 32.4°C, night 26.2°C, sea temperature about 30.0°C. Ranked by share of calm days, May is number 5 of 12.
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).
Calm sea
daily wave ≤1 m; ranked 5 of 12 · 5 years
Waves (daily maximum)
0.5 m
average · 5 years
Rainy days
16 %
days with 5 mm or more of rain · average 3.3 mm/day · 26 years
Temperature
32° by day
night 26°C · sea 30.0°C · sun 8.4 h/day
Early, mid and late May
early May (1-10): calm sea 97% of days, rain of 5 mm+ 13%; mid May (11-20): calm sea 100% of days, rain of 5 mm+ 17%; late May (21-31): calm sea 100% of days, rain of 5 mm+ 16%.
This month compared with the others
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.
Frequently asked questions
What is the sea like in Nha Trang in May?
According to the Open-Meteo Marine model (5 years), in May the highest wave of the day is 1 m or less on 99% of days; the average daily maximum wave height is 0.47 m. Summary of the statistics: the sea is mostly calm. Ranked by share of calm days, May is number 5 of 12. These are statistics from past years, not a forecast.
Does it rain in Nha Trang in May?
According to the Nha Trang weather station (26 years), rain of 5 mm or more falls on about 16% of days in May, with 3.3 mm of rain a day on average. These are statistics from past years, not a forecast.
How warm is the sea in Nha Trang in May?
Sea surface temperature from the Open-Meteo Marine model (5 years) averages about 30.0°C.
How hot is Nha Trang in May?
According to the Nha Trang weather station (26 years), daytime highs average 32.4°C and nights 26.2°C, with about 8.4 hours of sun a day.
What is the weather like in late May in Nha Trang?
By part of the month: early May (1-10): calm sea 97% of days, rain of 5 mm+ 13%; mid May (11-20): calm sea 100% of days, rain of 5 mm+ 17%; late May (21-31): calm sea 100% of days, rain of 5 mm+ 16%. Statistics for 5 years (sea) and 26 years (rain), not a forecast.
Is May a good time to go to Nha Trang?
It depends on what you plan. For the beach: calm sea on 99% of days (number 5 of 12 months for calm seas, 1 = calmest). Rain of 5 mm+ on 16% of days (number 5 of 12 for rainy days, 1 = rainiest), water 30.0°C. These are statistics from past years, not a forecast.
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.