If one goes to Fiji or any other island group in the area (for example, Tahiti, Samoa or Cook Islands) for a beach vacation, then the best time to go is between April and early-October. The sun won't be directly overhead and blistering, heat and humidity won't be stifling. Also, it is not the rainy season during those months.

 June-August is the coolest time, which means very comfortable 70's-low 80's, and humidity is at a minimum. May and September are very nice, too. April and October can be quite hot but nothing like the trying conditions to be had from December to March.

Remember, weather in Fiji is a tricky animal. The time to go really depends on your reason for traveling. For those interested in diving or surfing, Fiji's winter months are the best time - for the biggest breaks and the best visibility.   For land activities such as hiking, biking or rainforest trekking, the cooler, drier winter months also make for a more pleasurable time.

Others who are looking for the best time to snorkel when the water is warm and the surf is not as big, the summer months would be preferable.

(Diving is excellent throughout the year I the Fiji Islands. Due to the oceanic influences present in the region, and not continental, we are lucky enough not to be affected by land run off or large scale weather shifts or monsoon seasons.

During our summer months, November to April, the water temperature rises to a very comfortable 27-30°C (75-80°F). We recommend 2mm short suits for this time of year. This time of year is known for calm seas which enables liveaboards and diveboats to get to more remote reefs and island locations. The higher temperature does increase the oceanic plankton growth however, reducing visibility to around 70-80ft (24-26m) but attracting the manta rays in large numbers at many dive spots, especially Koro and Kadavu.

Winter is May to October, when water temperatures are 24-27°C (70-75°F). 3 or 5 mm steamers would be recommended.  This time of year is known for fabulous visibility of more than 100ft (30m) on every dive.)

** Note:  The original information for this thread came from the following forum thread: http://www.tripadvisor.com/ShowTopic-...