Samoa in September: Weather, Crowds & What to Expect
Climate Map for September
Average temperature across Samoa in September.
City Weather in September
| City | High | Low | Rain | UV | Feels |
|---|---|---|---|---|---|
| Apia | extreme | ||||
| Asau, Samoa | 28° | 22° | 180 mm | extreme | Warm |
| Mulifanua | extreme | ||||
| Faleula | 29° | 23° | 169 mm | extreme | Warm |
| Vaimoso | 29° | 23° | 189 mm | extreme | Warm |
| Siusega | 29° | 22° | 202 mm | extreme | Warm |
| Malie | 29° | 23° | 163 mm | extreme | Warm |
High / low are average daily temperatures (°C). “Feels” reflects how hot or cold it feels, allowing for humidity.
Upolu - Apia & North Coast
September sees more festival activity in Apia with the Teuila Festival bringing cultural performances and craft markets; weather is warm and usually dry, ideal for outdoor events. Light evening breezes keep humidity manageable, and day trips to coastal villages or short hikes around Mt Vaea are comfortable. Expect crowds around festival dates, so plan bookings early; sunscreen and a portable umbrella for surprise cloud-bursts are wise.
Upolu - South Coast & Aleipata (Lalomanu, To-Sua)
September is festival season in Apia but the Aleipata coast itself stays in fine dry weather, with steady days good for beach weddings, diving, and village visits. Crowds increase a little with festival overflow, but the beaches keep their relaxed feel; To-Sua is photogenic and busy, so arrive early. Nights are mild with a breeze; include insect repellent if you plan to be outdoors after dusk.
Upolu - Interior Highlands and River Valleys
September is a fine month for interior exploration, with steady daytime warmth and diminishing rainfall making long trail routes inviting; birdlife and flowering plants are active. The Teuila Festival in Apia can be combined with quieter inland treks for a cultural-nature mix. Expect moderate tourist numbers and stable road conditions, but still carry a light rain layer for unexpected squalls.
Savai’i - Islandwide (Salelologa, Afu Aau, Alofaaga Blowholes)
September is warm and dry with steady sea conditions that suit snorkeling and coastal exploration; cultural events on the island are modest compared with Apia but villages are welcoming. Trails remain firm and river levels low, so independent day trips are more dependable. Expect moderate tourist numbers from regional travelers and pack sunscreen and reef footwear for visits to tide pools and snorkel sites.
Manono & Apolima - Small Outer Islets
September sees warming and a slight increase in humidity, but conditions remain largely favorable for visits to Manono and Apolima with good sea clarity for snorkeling. Village events and church services are accessible and peaceful, and ferry runs remain regular. Travel with minimal luggage as island facilities are basic and bring a small first-aid kit for longer stays.