Tonga in september: average Weather, Temperature and Climate, Where to go?
Weather in Tonga in september 2025
In this section, you have access to the weather forecast for september for most popular cities in Tonga. These predictions are probabilities for september from weather reports for many years. The percentage indicates the probability of having the weather mentioned.
Average weather in september in Nukuʻalofa
good weather UV index: 6
Weather at 6am
74°F
Moderate rain at times
31% of time
28%
18%
17%
Weather at 12pm
74°F
Partly Cloudy
36% of time
28%
20%
12%
Weather at 6pm
74°F
Partly Cloudy
42% of time
19%
18%
17%
Weather at 3am
74°F
34%
25%
23%
15%
More information about the weather in Nukuʻalofa in september
Where to go in Tonga in september?
Where to go in Tonga in september: destination map
perfect weather
good
tolerable
bad
very bad
Where should you go in Tonga in september when it comes to the weather?
Remember:
The climate in Tonga in september is good across the board.
You are lucky: Although it is not perfect the weather in Tonga in september is, according to seasonal norms, pretty good in Haʻapai islands (Lifuka and Foa), Tongatapu Island, Nukuʻalofa and Vavaʻu island. I allows to enjoy tour in these areas. And even why not take a little time to take a nap at the pool under the sun!
If you do not go the sun and blue sky, but, for example for hiking, the city of Niuafoʻou (Niuas islands) have a just ok weather for this kind of activity in september.
Climate in Tonga in september
Climate in Nukuʻalofa in september
In september, the mean temperature in Nukuʻalofa is 74°F (maximum temperature is 76°F and minimum temperature is 74°F). The climate is quite comfortable there in september. With 5.7in over 5 days, rainfall can happen throughout your trip. But this is reasonably and it will not be continuous.
With good weather conditions, the month of september is a good time to go in this city.
| September | |||
| Average temperature | 74°F | ||
| Highest temperature | 76°F | ||
| Lowest temperature | 74°F | ||
| Sea temperature | 76°F | ||
| Rainfall | 5.7in | ||
| Number of days with rainfall | 5 day(s) (18%) | ||
| Humidity | 79% | ||
| Daily sunshine hours | 10 | ||
| Cloud cover | 50% | ||
| Length of day | 11:58 | ||
| Our opinion at whereandwhen.net | good |
Climate in Haʻapai islands (Lifuka / Foa) in september
In the month of september, maximum temperature is 77°F and minimum temperature is 76°F (for an average temperature of 76°F). The climate is quite pleasant here in the month of september. With 4.4in over 4 days, rainfall can happen for your journey. But this is moderate and it is only of temporary showers.
With a good climate, the month of september is a recommended month to go in this locality.
| September | |||
| Average temperature | 76°F | ||
| Highest temperature | 77°F | ||
| Lowest temperature | 76°F | ||
| Sea temperature | 77°F | ||
| Rainfall | 4.4in | ||
| Number of days with rainfall | 4 day(s) (14%) | ||
| Humidity | 80% | ||
| Daily sunshine hours | 10 | ||
| Cloud cover | 50% | ||
| Length of day | 11:59 | ||
| Our opinion at whereandwhen.net | good |
Climate in Niuafoʻou (Niuas islands) in september
In the month of september, maximum temperature is 81°F and minimum temperature is 79°F (for an average temperature of 81°F). The climate is good around this city in the month of september. With 7in over 9 days, you will experience some showers during your holidays. But this is pretty reasonably and you will not be too bothered by it.
With proper weather, september is okay (but not the best month) for traveling in that area in Tonga.
| September | |||
| Average temperature | 81°F | ||
| Highest temperature | 81°F | ||
| Lowest temperature | 79°F | ||
| Rainfall | 7in | ||
| Number of days with rainfall | 9 day(s) (30%) | ||
| Humidity | 81% | ||
| Daily sunshine hours | 10 | ||
| Cloud cover | 54% | ||
| Length of day | 12:00 | ||
| Our opinion at whereandwhen.net | good |
Climate in Tongatapu Island in september
In the month of september, the mean temperature in Tongatapu Island is 74°F (maximum temperature is 76°F and minimum temperature is 74°F). The climate is quite pleasant there in the month of september. With 5.7in over 5 days, you risk getting wet slightly during your trip. But this is moderate and it is only of temporary showers.
With a good climate, the month of september is a recommended month to go in that area.
| September | |||
| Average temperature | 74°F | ||
| Highest temperature | 76°F | ||
| Lowest temperature | 74°F | ||
| Sea temperature | 75°F | ||
| Rainfall | 5.7in | ||
| Number of days with rainfall | 5 day(s) (18%) | ||
| Humidity | 79% | ||
| Daily sunshine hours | 10 | ||
| Cloud cover | 50% | ||
| Length of day | 11:58 | ||
| Our opinion at whereandwhen.net | good |
Climate in Vavaʻu island in september
In the month of september, maximum temperature is 77°F and minimum temperature is 77°F (for an average temperature of 77°F). The climate is quite enjoyable in that area in september. With 4.5in over 6 days, you risk getting wet slightly throughout your journey. But this is reasonably and you will not be too bothered by it.
With a good weather, the month of september is a good time to go in this city.
| September | |||
| Average temperature | 77°F | ||
| Highest temperature | 77°F | ||
| Lowest temperature | 77°F | ||
| Sea temperature | 79°F | ||
| Rainfall | 4.5in | ||
| Number of days with rainfall | 6 day(s) (19%) | ||
| Humidity | 81% | ||
| Daily sunshine hours | 10 | ||
| Cloud cover | 53% | ||
| Length of day | 11:59 | ||
| Our opinion at whereandwhen.net | good |
All cities in Tonga in september
| Nukuʻalofa in september | good weather |
| Haʻapai islands (Lifuka and Foa) in september | good weather |
| Niuafoʻou (Niuas islands) in september | good weather |
| Tongatapu Island in september | good weather |
| Vavaʻu island in september | good weather |
Weather data for Tonga in september:
Weather data for Tonga in september is derived from an average of the weather forecast since 2009 in Tonga. There is a margin of error and these forecasts are to be considered as general information only. The weather in Tonga can vary slightly from year to year, but these predictions should limit surprises. So you can pack your bags and check when is the best time to go to Tonga.