Swimming in Papua New Guinea in september 2025 Sea temperature by city in september
Do you want to go to the beach in Papua New Guinea 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 Papua New Guinea by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in Papua New Guinea in september 2025
Here, find the average sea temperature in Papua New Guinea in september in several coastal cities.
South in september
79°F
min: 77°F / max: 81°F
Alotau
79°F
min: 77°F / max: 82°F
Daru
79°F
min: 76°F / max: 83°F
Kerema
80°F
min: 77°F / max: 83°F
Momase Region in september
84°F
min: 82°F / max: 86°F
83°F
min: 81°F / max: 86°F
Aitape
85°F
min: 84°F / max: 86°F
Vanimo
85°F
min: 84°F / max: 87°F
Wewak
85°F
min: 83°F / max: 86°F
Islands in september
Kavieng
86°F
min: 85°F / max: 87°F
Rabaul
85°F
min: 84°F / max: 87°F
Arawa
85°F
min: 84°F / max: 86°F
84°F
min: 83°F / max: 86°F
Lorengau
86°F
min: 85°F / max: 87°F
Where should you go swimming in Papua New Guinea in the month of september?
Swimming in Papua New Guinea in september is ideal (in the best case scenario)
In september in Papua New Guinea swimming conditions vary by city. Details below:
In september in Madang, Lae, Kavieng, Rabaul, Aitape, Alotau, Arawa, Daru, Kerema, Kimbe, Lorengau, Vanimo and Wewak, swimming conditions are perfect! With water reaching a maximum of 86°F and an average of 84°F, going in the water (and staying there!) feels great.
As for Port Moresby, swimming is pleasant in september. The sea water is 79°F on average (min: 77°F/max: 81°F) so you can easily spend time in the water.
Where to go swimming in Papua New Guinea in september: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in september
Port Moresby
| September | |||
| Average sea temperature | 79°F | ||
| Minimum sea temperature | 77°F | ||
| Maximum sea temperature | 81°F | ||
| Average outside temperature | 81°F | ||
| Maximum outside temperature | 85°F | ||
| Minimum outside temperature | 77°F | ||
| Precipitation | 7.6in | ||
| Number of days of precipitation | 11 jour(s) (37%) | ||
| Cloud cover | 36% | ||
| Our opinion | pleasant swimming |
More information on swimming in Port Moresby in september
Madang
| September | |||
| Average sea temperature | 84°F | ||
| Minimum sea temperature | 82°F | ||
| Maximum sea temperature | 86°F | ||
| Average outside temperature | 83°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 79°F | ||
| Precipitation | 8.4in | ||
| Number of days of precipitation | 14 jour(s) (46%) | ||
| Cloud cover | 34% | ||
| Our opinion | ideal swimming |
More information on swimming in Madang in september
Lae
| September | |||
| Average sea temperature | 83°F | ||
| Minimum sea temperature | 81°F | ||
| Maximum sea temperature | 86°F | ||
| Average outside temperature | 76°F | ||
| Maximum outside temperature | 79°F | ||
| Minimum outside temperature | 70°F | ||
| Precipitation | 12.8in | ||
| Number of days of precipitation | 16 jour(s) (53%) | ||
| Cloud cover | 44% | ||
| Our opinion | ideal swimming |
More information on swimming in Lae in september
Kavieng
| September | |||
| Average sea temperature | 86°F | ||
| Minimum sea temperature | 85°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 86°F | ||
| Minimum outside temperature | 83°F | ||
| Precipitation | 17.3in | ||
| Number of days of precipitation | 18 jour(s) (61%) | ||
| Cloud cover | 43% | ||
| Our opinion | ideal swimming |
Rabaul
| September | |||
| Average sea temperature | 85°F | ||
| Minimum sea temperature | 84°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 83°F | ||
| Maximum outside temperature | 85°F | ||
| Minimum outside temperature | 79°F | ||
| Precipitation | 10.4in | ||
| Number of days of precipitation | 16 jour(s) (54%) | ||
| Cloud cover | 35% | ||
| Our opinion | ideal swimming |
List of coastal cities in Papua New Guinea
| Port Moresby in september | pleasant swimming |
| Madang in september | ideal swimming |
| Lae in september | ideal swimming |
| Kavieng in september | ideal swimming |
| Rabaul in september | ideal swimming |
| Aitape in september | ideal swimming |
| Alotau in september | ideal swimming |
| Arawa in september | ideal swimming |
| Daru in september | ideal swimming |
| Kerema in september | ideal swimming |
| Kimbe in september | ideal swimming |
| Lorengau in september | ideal swimming |
| Vanimo in september | ideal swimming |
| Wewak in september | ideal swimming |