Weather in Nha Trang in October

Shoulder season. October sits in between. You will get good days and you will lose some. You should expect rain on 25 days of the month, which is more days wet than dry.

October ranks 7 of 12 in Nha Trang: past the worst of the year but short of February, which is the month to book if the dates are open.

Rain on 25 of the month's 31 days, 8 of them heavy. At that frequency a wet-weather backup is not a contingency, it is the itinerary — book the indoor things first and treat the clear days as the bonus. Natural fibres and a second shirt for the day. At 83% nothing dries, including you.

What the averages hide

Averages flatten a month, and this one hides a few things: the day barely swings — 1.5 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest October day reached 30.7 °C and the coldest night fell to 24.8 °C, and the wettest single day dropped 210 mm — roughly 80% of the month's rain in one day.

October is moderately variable: 98 mm in the driest year against 646 mm in the wettest, around an average of 264 mm. Roughly two Octobers in three land near that average, and the third does something else entirely.

Wind is light at 15.3 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 83%, high enough to notice on the warm days without dominating them.

How October sits in the year

Temperatures hold steady either side: 29.4 °C in September, 28.4 here, 27.4 in November. Nothing about the timing within the month matters much.

Daylight in October

Nha Trang sits close enough to the equator that daylight barely moves all year — 11.9 hours in October, against a range of just 1.4 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

Sea temperature

The sea sits at about 28.4 °C in October — warm enough that the water offers no relief from the heat. The sea peaks at 29.3 °C in May and bottoms out at 25.3 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

October in Nha Trang versus nearby

If Nha Trang is one option among several, the nearby comparison is worth making. Qui Nhon is close enough to be a coin toss — within a degree on temperature, 1 day less rain. Vũng Tàu is close enough to be a coin toss — within a degree on temperature, 1 day more rain.

So: October is a compromise. February is 37 points better and is what Nha Trang is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Nha Trang

See all twelve months in Nha Trang, or where else to go in October.