Wallis & Futuna Weather in September

September in Wallis and Futuna continues to feel warm and tropical, even as the islands move toward the more humid part of the year.

Daytime temperatures typically reach around 29°C (84.2°F), while evenings remain comfortably mild at about 24°C (75.2°F).

Humidity levels are high, creating that classic South Pacific warmth, though steady tradewinds often help make conditions feel more manageable.

Sea Temperature in September

The surrounding lagoon and ocean waters remain beautifully warm in September, averaging around 28°C (82.4°F). These inviting sea temperatures make swimming, snorkelling and other water activities enjoyable throughout the month, particularly in sheltered areas when conditions are calm.

Even in September, Wallis and Futuna enjoys long, bright tropical days. With around 12 hours of daylight, there’s plenty of time to explore beaches, lagoons and inland walking trails. While brief showers can occur, sunshine is still common, offering excellent conditions for outdoor sightseeing and relaxed coastal afternoons.

UV Levels During September

September brings extremely high UV levels, with the index often reaching 11 or above around midday. Sun protection is essential, apply high-factor, reef-safe sunscreen generously and regularly, and consider wearing protective clothing, a wide-brimmed hat and sunglasses when spending extended time outdoors.

For more, check out The Best Sunscreens for Wallis & Futuna + Sun Protection Tips.

Sunrise and Sunset During September

September has daylight hours lasting about 12 hours a day in Wallis and Futuna.

• Sunrise: 5:48 am at the beginning of September and 5:28 am at the end of September
• Sunset: 5:40 pm at the beginning of September and 5:41 pm at the end of September.

September in Wallis and Futuna brings a mix of warm, sunny periods and occasional short-lived tropical showers.

The islands receive roughly 186 mm (7.3 in) of rainfall during the month, typically spread across around five days. When rain does fall, it is often in brief bursts rather than prolonged downpours, meaning it's unlikely to disrupt plans for long.

A light rain jacket can be useful, but warm temperatures and steady breezes usually help conditions clear quickly.

Travellers seeking the driest possible conditions may prefer mid-winter months, but September remains a warm and rewarding time to visit with lush landscapes and vibrant greenery.

In Wallis and Futuna, the South Pacific cyclone season typically runs from November to April. As a result, September falls outside the main cyclone period and carries a very low risk of tropical storms developing.

Other months with similarly low cyclone risk include June, July and August, making the mid-year period one of the most stable times weather-wise to visit the islands. While brief tropical showers can still occur, significant storm systems are uncommon in September.

Find out more about tropical storms in our guide, Cyclone & Hurricane Safety in Wallis & Futuna.

September is a rewarding time to explore Wallis and Futuna, with warm temperatures, lush landscapes and relatively settled conditions that make outdoor adventures especially enjoyable.

Begin on Wallis (Uvea), the more accessible of the two main islands. The capital, Mata-Utu, offers a glimpse into daily island life, with its waterfront setting, cathedral and local markets.

Nature lovers should head to Lake Lalolalo, a striking volcanic crater lake surrounded by steep green cliffs, or visit Talietumu (Kolo Nui), an ancient Tongan fortification that provides sweeping coastal views and insight into the island’s pre-European history.

The vast Wallis lagoon is also ideal for swimming, snorkelling and boat trips to small offshore islets when sea conditions are calm.

For a more remote and rugged experience, travel to Futuna. The island’s dramatic cliffs, quiet beaches and forested interior offer a sense of raw natural beauty.

A visit to the Saint-Pierre-Chanel Basilica provides cultural and historical context, while hikes into the hills reveal panoramic views over the Pacific.

If time allows, exploring both Wallis and Futuna offers a well-rounded experience, from tranquil lagoons and archaeological sites to mountainous landscapes and deep-rooted Polynesian traditions.

Be prepared for Wallis and Futuna in September by packing these few seasonal essentials:

• Light clothing layers for the day (preferably linen, bamboo or merino preferably so it is super light - we like the sustainable bamboo clothing of Moso Morrow)
• Light long-sleeved tops (to cover from sun and mosquitoes)
• Light pants/trousers/skirt (to cover the knees when appropriate – villages or church services or to protect from mosquitoes when hiking, for example)
• Sunhat
• Sunglasses
• Swimwear
• Rash vest (we like the UV-protecting Sharkskin rashies)
• Closed walking shoes
• Flip-flops/jandals/sandals
• Insect repellent
• High-factor sunscreen (that’s reef-safe and water-resistant).

Get more ideas on what to pack with our guide, What to Pack for Wallis & Futuna: Full Wallis & Futuna Packing List.