Swimming in the South Pacific Islands in september 2025 Sea temperature by city in september
Do you want to go to the beach in the South Pacific Islands in september 2025? Is it the right month to go for pleasant temperatures and staying in the water for a long time? The answer is on this page with the sea temperatures in september in the South Pacific Islands by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in the South Pacific Islands in september 2025
Here, find the average sea temperature in the South Pacific Islands in september in several coastal cities.
Samoan Islands in september
83°F
min: 81°F / max: 85°F
83°F
min: 81°F / max: 85°F
83°F
min: 81°F / max: 85°F
83°F
min: 81°F / max: 84°F
Apolima island
83°F
min: 81°F / max: 85°F
Lalomanu Beach
83°F
min: 81°F / max: 85°F
Cook islands in september
77°F
min: 74°F / max: 80°F
76°F
min: 74°F / max: 80°F
Tonga in september
76°F
min: 73°F / max: 78°F
77°F
min: 74°F / max: 80°F
75°F
min: 73°F / max: 78°F
79°F
min: 77°F / max: 81°F
Tuvalu in september
85°F
min: 83°F / max: 87°F
85°F
min: 83°F / max: 87°F
85°F
min: 83°F / max: 87°F
Solomon islands in september
84°F
min: 82°F / max: 87°F
84°F
min: 82°F / max: 86°F
85°F
min: 83°F / max: 87°F
84°F
min: 81°F / max: 86°F
Kiribati in september
85°F
min: 82°F / max: 87°F
82°F
min: 79°F / max: 85°F
Vanuatu in september
Lenakel
77°F
min: 75°F / max: 79°F
Luganville
81°F
min: 79°F / max: 83°F
Norsup
80°F
min: 79°F / max: 82°F
Sola
82°F
min: 80°F / max: 84°F
Where should you go swimming in the South Pacific Islands in the month of september?
Swimming in the South Pacific Islands in september is ideal (in the best case scenario)
In september in the South Pacific Islands swimming conditions vary by city. Details below:
In september in Apia, Vaiaku (Fongafale), Honiara, Kiribati, Samoan Islands, Savai'i island, Tarawa, Upolu island, Christmas Island, Funafuti, Guadalcanal Island, Malaita Island, New Georgia Islands, Nukufetau, Pago Pago (American Samoa), Apolima island, Lalomanu Beach, Lotofaga, Luganville, Manase, Manono island, Norsup, O Le Pupu-Pue National Park, Salelologa and Sola, swimming conditions are perfect! With water reaching a maximum of 85°F and an average of 83°F, going in the water (and staying there!) feels great.
As for Avarua, Nukuʻalofa, Rarotonga island, Haʻapai islands (Lifuka and Foa), Tongatapu Island, Vavaʻu island and Lenakel, swimming is pleasant in september. The sea water is 77°F on average (min: 74°F/max: 80°F) so you can easily spend time in the water.
Where to go swimming in the South Pacific Islands in september: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in september
Apia
| September | |||
| Average sea temperature | 83°F | ||
| Minimum sea temperature | 81°F | ||
| Maximum sea temperature | 85°F | ||
| Average outside temperature | 83°F | ||
| Maximum outside temperature | 83°F | ||
| Minimum outside temperature | 81°F | ||
| Precipitation | 5.5in | ||
| Number of days of precipitation | 7 jour(s) (25%) | ||
| Cloud cover | 47% | ||
| Our opinion | ideal swimming |
More information on swimming in Apia in september
Avarua
| September | |||
| Average sea temperature | 77°F | ||
| Minimum sea temperature | 74°F | ||
| Maximum sea temperature | 80°F | ||
| Average outside temperature | 76°F | ||
| Maximum outside temperature | 76°F | ||
| Minimum outside temperature | 74°F | ||
| Precipitation | 3.4in | ||
| Number of days of precipitation | 4 jour(s) (14%) | ||
| Cloud cover | 50% | ||
| Our opinion | pleasant swimming |
More information on swimming in Avarua in september
Nukuʻalofa
| September | |||
| Average sea temperature | 76°F | ||
| Minimum sea temperature | 73°F | ||
| Maximum sea temperature | 78°F | ||
| Average outside temperature | 74°F | ||
| Maximum outside temperature | 76°F | ||
| Minimum outside temperature | 74°F | ||
| Precipitation | 5.7in | ||
| Number of days of precipitation | 5 jour(s) (18%) | ||
| Cloud cover | 50% | ||
| Our opinion | pleasant swimming |
More information on swimming in Nukuʻalofa in september
Vaiaku (Fongafale)
| September | |||
| Average sea temperature | 85°F | ||
| Minimum sea temperature | 83°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 85°F | ||
| Minimum outside temperature | 83°F | ||
| Precipitation | 12.6in | ||
| Number of days of precipitation | 17 jour(s) (56%) | ||
| Cloud cover | 42% | ||
| Our opinion | ideal swimming |
More information on swimming in Vaiaku (Fongafale) in september
Honiara
| September | |||
| Average sea temperature | 84°F | ||
| Minimum sea temperature | 82°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 86°F | ||
| Minimum outside temperature | 81°F | ||
| Precipitation | 13.9in | ||
| Number of days of precipitation | 19 jour(s) (62%) | ||
| Cloud cover | 44% | ||
| Our opinion | ideal swimming |
More information on swimming in Honiara in september
List of coastal cities in the South Pacific Islands
| Apia in september | ideal swimming |
| Avarua in september | pleasant swimming |
| Nukuʻalofa in september | pleasant swimming |
| Vaiaku (Fongafale) in september | ideal swimming |
| Honiara in september | ideal swimming |
| Kiribati in september | ideal swimming |
| Samoan Islands in september | ideal swimming |
| Rarotonga island in september | pleasant swimming |
| Savai'i island in september | ideal swimming |
| Tarawa in september | ideal swimming |
| Upolu island in september | ideal swimming |
| Christmas Island in september | ideal swimming |
| Funafuti in september | ideal swimming |
| Guadalcanal Island in september | ideal swimming |
| Haʻapai islands (Lifuka and Foa) in september | pleasant swimming |
| Malaita Island in september | ideal swimming |
| New Georgia Islands in september | ideal swimming |
| Nukufetau in september | ideal swimming |
| Pago Pago (American Samoa) in september | ideal swimming |
| Tongatapu Island in september | pleasant swimming |
| Vavaʻu island in september | pleasant swimming |
| Apolima island in september | ideal swimming |
| Lalomanu Beach in september | ideal swimming |
| Lenakel in september | pleasant swimming |
| Lotofaga in september | ideal swimming |
| Luganville in september | ideal swimming |
| Manase in september | ideal swimming |
| Manono island in september | ideal swimming |
| Norsup in september | ideal swimming |
| O Le Pupu-Pue National Park in september | ideal swimming |
| Salelologa in september | ideal swimming |
| Sola in september | ideal swimming |