Avoid Dec 1-20. Late month is a specialty NYE experience, not a typical visit.
December is the strangest month — wet-season weather (300mm rain across 20 days, 25-30% boat cancellation rate, visibility dropping to 10-14m) combined with NYE pricing surge in the last 10 days (rates double). Christmas to NYE week sees Bali-extension travelers despite poor conditions. Avoid unless dates are locked or NYE on a private island appeals.
# Gili Nanggu in December: Wet Season Plus NYE Surge
December at Gili Nanggu has a split personality. The first three weeks are wet-season weather at low-season-quiet, attracting almost no one. The last 10 days flip into a premium NYE escape that fills despite the weather, driven by Bali-extension travelers seeking near-private island NYE.
Both halves are unusual. Most travelers should avoid both.
The numbers confirm wet season fully established:
Rainfall: 300mm across 20 days. Long rain events, multi-day weather systems possible.
Visibility: 10-14m underwater. River runoff at peak. Coral colors muted to grey.
Sea state: Choppy with strong afternoon swells. Storm fronts roll through 2-4 times per month. Lombok Strait crossings get bumpy.
Temperature: 31°C daytime, 24°C overnight. Humidity at 84%.
Crowds: Very low Dec 1-20 (20-40/day) then spike during NYE week (60-100/day).
December boat crossings from Sekotong Tawun become unreliable. Cancellation rate climbs to 25-30%. Multi-day cancellations are possible during storm systems.
Pattern through month:
Morning crossings remain more reliable than afternoon. Day-trippers should commit to first morning boat (7-8am) and accept they may not make it back same day if afternoon weather deteriorates.
Overnight guests should build 1-2 day flex on each end of their stay.
December 27 through January 3 is Gili Nanggu's strangest period. Despite poor weather, the 15 rooms at Nanggu Cottages fill 2-3 months in advance for NYE.
The appeal:
The reality:
It's a specialty experience, not a quality experience. Travelers who book NYE at Gili Nanggu typically value the exclusivity and the story over conditions.
NYE week pricing is dramatic:
Two-person NYE overnight package (with NYE dinner): 4.5-6.0m IDR for the night of Dec 31.
Dec 1-20 sits in low-season pricing territory:
For travelers willing to accept the weather risk, early December offers similar value to early November but with somewhat worse conditions.
Christmas Day (Dec 25) on Gili Nanggu is unusual. The cottages serve a Christmas dinner (typically Indonesian-Western fusion). Most guests are Indonesian families or international travelers extending Bali Christmas trips.
It's not "Christmas atmosphere" in any traditional sense. The cottages don't decorate elaborately. There's no carol singing or Christmas market. It's a tropical island that happens to acknowledge Christmas with a special menu.
If you want a tropical Christmas escape, Bali offers more developed Christmas tourism. Gili Nanggu offers minimal Christmas-specific experience.
Day-tripping in December is genuinely risky. Recommendation:
Public boats run sporadically. Charters are available but often refuse afternoon returns.
Mainland supply deliveries to Nanggu Cottages restaurant become unreliable in December. Storm systems disrupt produce and protein deliveries.
Implications:
Plan to be flexible. Bring snack supplies for storm weather days.
December Gili Nanggu makes sense only for:
December is wrong for:
For most travelers, the answer is to skip December entirely. April or May offers the actual "best Gili Nanggu" experience for first-time visitors. September or October offers the smartest balance of conditions and crowds. December offers neither.
The only travelers who should specifically choose December: those for whom NYE on a near-private island with poor weather is itself the experience they want — typically those who've already done the standard Bali NYE tour and want something different.
If you're set on NYE at Gili Nanggu, book Nanggu Cottages by mid-September. The 15 rooms sell out 2-3 months ahead for NYE week despite poor weather, because it offers a near-private island NYE experience that feels exclusive. Expect rates around 2.0-2.5m IDR/night for Dec 30-Jan 2. Build a 2-day buffer on each side for boat weather risk.