Tonga weather in September 2025
Tonga weather in September 2025
Day
25 °C
Night
19 °C
Sea
24 °C
Precipitation
110 mm
in month
Rainy days
4 days
in month
Daylight
12 hours
average
Day
25 °C
Night
19 °C
Sea
24 °C
Precipitation
110 mm
in month
Rainy days
4 days
in month
Daylight
12 hours
average
Overview: Tonga
Travel information
Weather charts for Tonga
We make the most from 40 years of historical weather data to predict the best weather conditions.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.
Find more destinations like this
Activities in Tonga
Flights to Tonga
Destinations in Tonga
Destinations with similar weather to Tonga
Weather overview and FAQs
Weather overview
In Tonga in September, the average air temperature ranges from 25 °C (77 °F) during the day to 19 °C (66 °F) at night. There are 4 days of rain on average, where the rainfall is 110 mm (4.34 in).
Is September a good month to visit Tonga?
In September in Tonga, there are ideal conditions for a vacation. The daily temperatures in this month reach pleasant 25 °C (77 °F). The seawater temperature reaches ideal 24 °C (74 °F). At night, temperatures hover around a pleasant 19 °C (66 °F). You can expect just 4 days of rain during the month, taking an umbrella is not necessary.
What temperature can I expect during the day in September in Tonga?
In Tonga in September, the average daily temperatures will be 25 °C (77 °F). The ideal temperature for enjoying sunbathing by the water and a good temperature for other activities. For some people, it will be too hot in the direct sunlight and the stay may not be so pleasant. Don't forget to pack flip-flops, sunscreen, and a hand fan if necessary - it may come in handy.
How many rainy days can I expect in September in Tonga?
In September in Tonga, we can expect 4 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 1.0 days of the week, or in general - 14 % days.
What is the sea temperature in Tonga in September?
In Tonga in September expect the sea to be warm at 24 °C (74 °F). This warm sea is nice for swimming, maybe cold for some, but most people can spend a long time in it.
How long is the day (from dawn till dusk) in Tonga in September?
The length of daylight in Tonga in September is 12 hours.
What is the air temperature in September in Tonga at night?
The average night temperature in Tonga in September is 19 °C (66 °F). This temperature is pleasant for a wide range of evening, night, and morning activities from sports to sitting outside in restaurants or evening walks.
Is September part of the dry season in Tonga?
Yes, there is a dry season in Tonga in September with just 4 days during the month being rainy.
How windy is it in September in Tonga?
An average wind scale that can be expected in Tonga in September is 5.
Is the sea in Tonga warmer in September than in October?
No, the sea is not warmer in September in Tonga than in October.
Is the weather in Tonga warmer in September than in August?
Yes, September in Tonga is warmer than August by 1 °C (34 °F).
Is Tonga rainier in September than in August?
Yes, in Tonga in September it rains more than in August.
What is the temperature trend in Tonga in September?
Over the course of September in Tonga, the temperatures are rising from 25 °C (77 °F) at the beginning of the month to 26 °C (78 °F) at the end of the month.