South Pacific Islands in september: average Weather, Temperature and Climate, Where to go?
Weather in the South Pacific Islands in september 2025
In this section, find the the weather forecast for the month of september for most popular cities in Other South Pacific Islands. These datas are probabilities for september from weather reports for over 10 years. The percentage indicates the probability of having the weather mentioned.
Average weather in september in Cook islands
good weather UV index: 6
Weather at 6am
76°F
Moderate rain at times
34% of time
33%
14%
14%
Weather at 12pm
76°F
Partly Cloudy
34% of time
25%
21%
15%
Weather at 6pm
76°F
Partly Cloudy
36% of time
25%
18%
18%
Weather at 3am
76°F
34%
31%
19%
15%
More information about the weather in Cook islands in september
Where to go in the South Pacific Islands in september?
Where to go in the South Pacific Islands in september: destination map
perfect weather
good
tolerable
bad
very bad
Where to go in each region in september?
| Cook islands (Avarua, Palmerston island, Rarotonga island...) | 76°F to 85°F | 3 à 10 days | 77°F | good weather |
| Fiji (Nadi, Suva, Sigatoka...) | 77°F to 81°F | 5 à 10 days | tolerable weather* | |
| Kiribati (Tarawa, Christmas Island, Banaba Island...) | 81°F to 85°F | 2 à 8 days | 83°F to 85°F | good weather |
| Samoan Islands (Apia, Savai'i island, Upolu island...) | 83°F | 7 à 13 days | 83°F to 85°F | good weather* |
| Solomon islands (Honiara, Choiseul Island, Guadalcanal Island...) | 83°F to 86°F | 15 à 22 days | 85°F | tolerable weather* |
| Tonga (Nukuʻalofa, Tongatapu Island, Haʻapai islands (Lifuka and Foa)...) | 76°F to 81°F | 4 à 9 days | 76°F to 79°F | good weather |
| Tuvalu (Vaiaku (Fongafale), Funafuti, Nanumea...) | 85°F | 12 à 17 days | 85°F to 86°F | tolerable weather* |
| Vanuatu (Port-Vila, Luganville, Norsup...) | 77°F to 83°F | 3 à 10 days | 77°F to 83°F | good weather* |
Where should you go in the South Pacific Islands in september when it comes to the weather?
Remember:
The climate in the South Pacific Islands in september ranges from good to tolerable depending on the region and city.
Although it is not perfect the weather in Other South Pacific Islands that month is pretty good in Tonga, Kiribati, Samoan Islands and Cook islands. I allows to appreciate sightseeing in these places. And even why not take a little time to lazing in the sun!
If you do not go to spend your time in a lounger by the pool, but, for example for cultural tours or hiking, the cities of Gilbert islands and Solomon islands have a ok but correct weather for it in september.
Climate in the South Pacific Islands in september
Climate in Cook islands in september
In september, the mean temperature in Cook islands is 76°F (maximum temperature is 76°F and minimum temperature is 74°F). The climate quite enjoyable in this location in september. With 3.4in over 4 days, you will experience some showers throughout your journey. But this is moderate and you will not be too bothered by it.
With good weather conditions, the month of september is a good time to go there.
| September | |||
| Average temperature | 76°F | ||
| Highest temperature | 76°F | ||
| Lowest temperature | 74°F | ||
| Rainfall | 3.4in | ||
| Number of days with rainfall | 4 day(s) (14%) | ||
| Humidity | 80% | ||
| Daily sunshine hours | 10 | ||
| Cloud cover | 50% | ||
| Length of day | 11:58 | ||
| Our opinion at whereandwhen.net | good |
Climate in Kiribati in september
In the month of september, the mean temperature in Kiribati is 81°F (maximum temperature is 81°F and minimum temperature is 81°F). The climate is burning here in september. With barely 1.7in over 2 days, rain may be scarce for your stay.
With a good climate, the month of september is a good time to go in this locality in Other South Pacific Islands.
| September | |||
| Average temperature | 81°F | ||
| Highest temperature | 81°F | ||
| Lowest temperature | 81°F | ||
| Sea temperature | 82°F | ||
| Rainfall | 1.7in | ||
| Number of days with rainfall | 2 day(s) (6%) | ||
| Humidity | 80% | ||
| Daily sunshine hours | 10 | ||
| Cloud cover | 43% | ||
| Length of day | 12:07 | ||
| Our opinion at whereandwhen.net | good |
Climate in Solomon islands in september
In the month of september, maximum temperature is 86°F and minimum temperature is 81°F (for an average temperature of 85°F). The climate is very warm around this city in the month of september. With 13.9in over 19 days, you may find yourself often in the rain during your journey. So remember to pack rain clothes.
With proper weather, september is okay (but not the best month) for traveling in this locality.
| September | |||
| Average temperature | 85°F | ||
| Highest temperature | 86°F | ||
| Lowest temperature | 81°F | ||
| Rainfall | 13.9in | ||
| Number of days with rainfall | 19 day(s) (62%) | ||
| Humidity | 85% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 44% | ||
| Length of day | 12:03 | ||
| Our opinion at whereandwhen.net | tolerable |
Climate in Samoan Islands in september
In the month of september, maximum temperature is 83°F and minimum temperature is 81°F (for an average temperature of 83°F). The climate is very warm in that area in september. With 5.5in over 7 days, you will experience some showers throughout your vacations. 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 locality.
| September | |||
| Average temperature | 83°F | ||
| Highest temperature | 83°F | ||
| Lowest temperature | 81°F | ||
| Sea temperature | 83°F | ||
| Rainfall | 5.5in | ||
| Number of days with rainfall | 7 day(s) (25%) | ||
| Humidity | 79% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 47% | ||
| Length of day | 12:00 | ||
| Our opinion at whereandwhen.net | good |
Climate in Tonga in september
In september, the mean temperature in Tonga is 74°F (maximum temperature is 76°F and minimum temperature is 74°F). The climate good there in the month of september. With 5.7in over 5 days, you will experience some showers throughout your stay. But this is rather reasonably and it will not be continuous.
With a good climate, september is an advisable month to go there in Other South Pacific Islands.
| September | |||
| Average temperature | 74°F | ||
| Highest temperature | 76°F | ||
| Lowest temperature | 74°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 |
All cities in the South Pacific Islands in september
| Cook islands in september | good weather |
| Kiribati in september | good weather |
| Solomon islands in september | tolerable weather |
| Samoan Islands in september | good weather |
| Tonga in september | good weather |
| Tuvalu in september | tolerable weather |
Weather data for South Pacific Islands in september:
Weather data for South Pacific Islands in september is derived from an average of the weather forecast since 2009 in the South Pacific Islands. There is a margin of error and these forecasts are to be considered as general information only. The weather in the South Pacific Islands 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 islands of the South Pacific.