What should I pack for 10day cruise to South Pacific?

Below is a pretty detailed list. Exactly how many different tops/bottoms/dresses you bring depends on how you feel about doing laundry onboard. Some ships (Tahitian Princess is one) have laundromats. All have a laundry service.

Have a great trip!

Travel Essentials
* Passport
* Cruise tickets (if you use online check-in, bring the confirmation print-out)
* Airplane tickets (or e-ticket info)
* Keys, wallet
* Mobile phone (must be activated for international roaming, if you want to use it onboard)
* Camera, film or digital card, batteries or charger

The Basics
* Tops: shirts, blouses, sweaters, etc.
* Bottoms: for a week we recommend two casual and comfortable items (e.g., jeans, khakis, shorts) for daytime excursions and two dressier options (trousers, skirt)
* Undergarments
* Pajamas
* Light jacket
* Comfortable walking shoes (Sneakers are great, but if you have comfortable shoes that look more formal they will be more versatile. Sneakers are not usually allowed in the dining room, even on informal nights)
* Swim suit (even in colder destinations, you may wish to use the whirlpool, sauna or indoor pool)
* Formal clothes (see below)

Health & Beauty: Put liquid items in a seal-able plastic bag in case anything breaks or leaks in transit
* Medications and vitamins. Anti-nausea medication, if desired.
* Vanity kit (makeup, skincare, razor, etc.)
* Sunscreen, at least SPF 15 (bring an adequate supply: the American Cancer Society recommends applying a shot-glass size amount for the body, a tablespoon for the face -- each time you apply)
* Eyewear (glasses, contacts, contact solution, etc.)
* Haircare (conditioner, brush, styling products, etc.)
* Note: virtually all cruises provide shampoo, soap and hair dryers. As at hotels, quality may vary

Luggage and Bags
* Suitcase (wheeled cases or backpacks are the most practical)
* Day bag or beach bag for excursions. Should be at least large enough for a bottle of water
* Money belt or secure money pouch. Highly recommended - being pick-pocketed in a foreign country could be a disaster
* Handbags are optional; when you are onboard you rarely need more than your key card as this also functions as your ID and charge card
* Plastic bag for dirty laundry

Eveningwear: These are only required if your cruise has formal nights and if you want to dine in the main restaurant on those nights (usually if you go to the casual restaurant you do not have to dress up)
* Dress / gown or suit / tuxedo. Some lines are more formal than others; see the Savvy Guide for your cruise line for details.
* Matching shoes
* Wrap, jacket or sweater for ladies (can be chilly in the restaurants)

Warm Weather Extras:
* Pool / beach shoes
* Snorkel and goggles: these can be rented, but it is cheaper to bring your own
* Sun hat
* Beach book / magazines
* Extra swim suit(s)
* You do not need to bring a towel; the ship will provide pool and beach towels

BTW, here's a pretty comprehensive checklist:
http://www.cruisesavvy.com/savvyguide/kn...
And I used the "minimalist packing guide" that's linked to in that article to carry just carry-on for a 10-day cruise in the Caribbean. But I'm a little nuts in my hatred of checking luggage. =)

And if you'd like to share your stories and pictures from your cruise, you can get an online cruise journal (it's free) here:
http://www.cruisesavvy.com/journals

It's always warm there, so I would pack your summer clothes. You don't need jackets or anything like that, perhaps 1 sweater, but I doubt it. It is also humid, so consider your hair products too. I pretty much let my hair go a la natural in that type of weather. Have a wonderful cruise.

The key is to not overpack. You will need a daytime outfit, and an evening, outfit. Does the ship have a laundry? Some do have. If you plan to spend alot of time at the pool, daytime outfit, can go a day or two. Have fun! Don't forget the suntan lotion!