Gili Trawangan Main Beach — Sea temperature now
Palm-fringed east-coast beach with boat drop-offs.
Very warm water with a light chop and a light breeze — great swimming conditions.
Location
Gili Trawangan Main Beach on the map, with nearby beaches and live sea temperatures.
7-day forecast
Water, air, waves, wind and UV outlook for the week ahead.
Monthly sea temperature averages
Typical year-round water temperature, based on regional climatology.
Best time to swim in Gili Trawangan Main Beach
The sea in Gili Trawangan Main Beach peaks in January, when the water averages around 29°C.
The main swimming season runs from January – December, when surface temperatures stay comfortable for extended sessions.
On average, 12 months a year sit above 20°C — the threshold most swimmers describe as pleasant without a wetsuit.
The coldest month is typically August at around 27°C, when cold-water swimmers dominate the coast.
Gili Trawangan Main Beach sits in the Southern Hemisphere, so the warmest sea coincides with the December–February summer and the coolest with July–August.
Gili Trawangan Main Beach sea temperature history
Long-term climatology for Gili Trawangan Main Beach shows an annual mean sea temperature of 29°C, ranging from 27°C in winter to 29°C at the summer peak.
The seasonal swing is roughly 2°C between the coldest and warmest month — a useful yardstick when comparing years or checking whether the current sea is running above or below average.
Recent decades have trended slightly warmer at Gili Trawangan Main Beach, in line with regional sea-surface temperature records for the wider basin.
Monthly averages below are drawn from multi-decadal climatology and are updated as new observations arrive.
Gili Trawangan Main Beach sea temperature: frequently asked questions
What is the warmest month to swim in Gili Trawangan Main Beach?
January is the warmest month in Gili Trawangan Main Beach, when the sea averages about 29°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Gili Trawangan Main Beach?
The coldest month in Gili Trawangan Main Beach is typically August, when the water averages around 27°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Gili Trawangan Main Beach without a wetsuit?
The main swimming season in Gili Trawangan Main Beach runs from January – December — about 12 months a year when the sea sits above 20°C, the level most swimmers describe as pleasant without a wetsuit.
Do I need a wetsuit in Gili Trawangan Main Beach?
Gili Trawangan Main Beach stays warm year-round, so most swimmers never need a wetsuit — a rash guard is usually enough for sun and wildlife protection.
What is the average sea temperature in Gili Trawangan Main Beach?
The long-term annual mean sea temperature in Gili Trawangan Main Beach is about 29°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Gili Trawangan Main Beach?
The live reading at the top of this page shows the current sea temperature in Gili Trawangan Main Beach, updated hourly from marine buoy and satellite data. The 7-day forecast covers water, air, waves, wind and UV for the week ahead.
Year-round sea temperature
Best swim months: Jan – Feb – Mar – Apr – May – Jun – Jul – Aug – Sep – Oct – Nov – Dec
| Month | Sea | Comfort |
|---|---|---|
| Jan ⭐ | 29°C | Hot |
| Feb | 29°C | Hot |
| Mar | 29°C | Hot |
| Apr | 29°C | Hot |
| May | 29°C | Hot |
| Jun | 28°C | Hot |
| Jul | 28°C | Hot |
| Aug | 27°C | Hot |
| Sep | 28°C | Hot |
| Oct | 28°C | Hot |
| Nov | 29°C | Hot |
| Dec | 29°C | Hot |