What is the Weather Like in American Samoa in December?
December in American Samoa marks the heart of the wet season, expect humid days, lush green landscapes and the occasional heavy tropical downpour. While rain is more frequent, it often comes in short bursts, leaving plenty of time for sunshine in between. Better yet, the tradewinds lay off, making December one of the best months for water activities in calmer conditions.
The weather pairs perfectly with the festive energy around the islands as the local communities gear up for Thanksgiving and Christmas. Just keep in mind that December also falls within hurricane season, so it's worth staying updated on weather alerts during your trip.
Want to know what else to expect? Read on for more about temperatures, rainfall and daylight hours in American Samoa in December.
Before we jump into this weather guide for December, be sure to bookmark American Samoa Weather, Seasons & Climate + American Samoa Weather by Month, as well as The Best Time to Visit American Samoa: A Month-by-Month Guide for more travel tips and insights.
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5 Tips for Visiting American Samoa in December
- Book your flights and accommodation early for this busy time of the year.
- Pack insect repellent, as mosquitoes are more active during the wet season.
- Don’t expect much activity to happen around the islands during Christmas Day and New Year’s Eve – it’s best to be fully independent, perhaps tackling some national park trails, or join the celebrations until services open again.
- The UV levels are high in December, so be sure to apply high-factor sunscreen regularly.
- December is one of the best months for water activities, thanks to calmer waters compared to the dry season.
Typical Temperatures in December
December brings full tropical summer to American Samoa, with daytime highs averaging around 86°F (30°C) and nighttime lows cooling to about 75°F (24°C).
Humidity remains high throughout the month, so it can feel even hotter, but there's nothing like a dip in the ocean to cool off!
Sea Temperature in December
The ocean around American Samoa remains wonderfully warm year-round, and December is no exception. Sea temperatures typically hover around 84°F (29°C), making it the perfect time for snorkelling, swimming or just floating under the palm trees.
Hours of Sun in December
December delivers plenty of sunshine in American Samoa, with long, warm days perfect for outdoor activities. Expect around 13 hours of daylight and approximately five hours of bright sun each day, making it an excellent time for early morning hikes or beach sessions before lunchtime.
UV Levels During December
UV levels peak in December, reaching around 11+, classified as extreme. Sunscreen is a non-negotiable; apply a high-SPF, reef-safe formula every couple of hours or after swimming. Lightweight, UV-protective clothing and a wide-brimmed hat are also smart for extra protection. See The Best Sunscreens for American Samoa + Sun Protection Tips.
Sunrise and Sunset During December
December in American Samoa offers balanced daylight hours:
- Sunrise: Around 5:39 am at the start of the month, shifting to about 5:52 am by month's end
- Sunset: Around 6:34 pm at the beginning, extending to roughly 6:49 pm by the end of December
Rainfall in December
December is the peak of the wet season in American Samoa.
Rain becomes more frequent, with about 11 days of rainfall throughout the month. While the showers are often intense, they tend to be short-lived, allowing plenty of time to enjoy sunny windows between downpours.
American Samoa receives around 13.4 in (341 mm) of rain in December. Despite being the wettest month of the year, the downpours are usually brief, often enough to refresh the air before the sunshine returns.
Tropical Storms in December
December falls within the official South Pacific cyclone/hurricane season, which runs from November to April. While cyclones in American Samoa are relatively infrequent, the risk still increases this time of year, especially with warming seas and humid air building up over the region.
Historically, American Samoa has been impacted by several major cyclones in December. Cyclone Val (1991) remains one of the most destructive, while Cyclone Heta (2004) caused serious infrastructure damage and power outages.
While direct hits are rare, it's wise to monitor local advisories and familiarise yourself with Cyclone & Hurricane Safety in American Samoa.
If you're visiting American Samoa in December, travel insurance and a flexible itinerary are highly recommended, just in case Mother Nature decides to stir things up.
The Best Places to Visit in American Samoa in December
December may be one of the busier seasons in American Samoa, but the weather, combined with festive events, makes all of the main islands well worth exploring.
Tutuila – As the hub of American Samoa, Tutuila is especially lively in December, with Christmas parades, church celebrations and community feasts. It's a great time to stay in the Pago Pago area or near the National Park, where you'll still find peaceful beaches and lush hikes. See what Tutuila has to offer in our 101 Best Things to Do in American Samoa: The Ultimate List.
Manu'a Islands – Looking to disconnect and unwind? The Manu'a Islands (Ta'ū, Ofu and Olosega) offer secluded beaches, untouched coral reefs and warm hospitality with far fewer visitors. They're ideal for a quiet retreat away from the festive bustle. For more information, check out The Complete Travel Guide to the Manu'a Islands.
Can't choose between them? Use our The Best Islands to Visit in American Samoa guide to help you decide.
December Packing List for American Samoa
Be prepared for American Samoa in December by packing these few seasonal essentials:
- High-factor reef-safe sunscreen
- Insect repellent
- Light bamboo, linen or merino layers (we like the sustainable bamboo clothing of Moso Morrow)
- Light long-sleeved tops (to cover from sun and mosquitoes)
- Light pants/trousers (to cover the knees when appropriate – villages or church services, for example)
- Sunhat
- Sunglasses
- Swimwear
- Rash vest (we like the UV-protecting Sharkskin rashies)
- Closed walking shoes
- Flip-flops/jandals/sandals
- A Christmas gift for the family you are staying with if doing a homestay, for example.
Get more ideas on what to pack with our guide, What to Pack for American Samoa: Full American Samoa Packing List.
More About the Weather in American Samoa in December
That's it for our complete guide to the weather and climate in American Samoa in December. Check out the following articles for more weather advice:
- American Samoa Weather, Seasons & Climate + American Samoa Weather by Month
- The Best Time to Visit American Samoa: A Month-by-Month Guide
- American Samoa Weather in October
- American Samoa Weather in November
- American Samoa Weather in January
Finally, enjoy a comprehensive guide to planning a trip to American Samoa in The Complete Travel Guide to American Samoa.
