Bali is a coastal area of Indonesia on the Indian Ocean, with 37 tracked beaches. The sea here ranges from about 27°C in the coolest month to 29°C at the summer peak, with roughly 12 months a year sitting above 20°C — the level most swimmers describe as pleasant without a wetsuit. Use the beach list below to check the current sea temperature at each spot before you head out.
Bali
37 tracked beaches in Bali, Indonesia, with live Indian Ocean temperatures.
Sea
Indian Ocean
Avg sea temp now
27.0°C
Best months
Year-round
Best time to swim in Bali
The sea in Bali 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 July at around 27°C, when cold-water swimmers dominate the coast.
Bali sits in the Southern Hemisphere, so the warmest sea coincides with the December–February summer and the coolest with July–August.
Bali sea temperature history
Long-term climatology for Bali shows an annual mean sea temperature of 28°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 Bali, 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.
Jan
29°C
Feb
29°C
Mar
29°C
Apr
29°C
May
29°C
Jun
28°C
Jul
27°C
Aug
27°C
Sep
27°C
Oct
28°C
Nov
29°C
Dec
29°C
Values are area averages; individual beaches vary by exposure and depth.
Bali sea temperature: frequently asked questions
What is the warmest month to swim in Bali?
January is the warmest month in Bali, when the sea averages about 29°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Bali?
The coldest month in Bali is typically July, when the water averages around 27°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Bali without a wetsuit?
The main swimming season in Bali 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 Bali?
Bali 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 Bali?
The long-term annual mean sea temperature in Bali is about 28°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Bali?
The live reading at the top of this page shows the current sea temperature in Bali, updated hourly from marine buoy and satellite data. The 7-day forecast covers water, air, waves, wind and UV for the week ahead.
Beaches in the Bali
Ranked by current live sea temperature.
- 1Nyanyi BeachCanggu, Indonesia27.7°C
- 2Jimbaran BayJimbaran, Indonesia27.6°C
- 3Padang PadangUluwatu, Indonesia27.6°C
- 4Jemeluk BeachAmed & East Bali, Indonesia27.5°C
- 5Green Bowl BeachUluwatu, Indonesia27.4°C
- 6Tanjung Benoa BeachNusa Dua, Indonesia27.4°C
- 7Menjangan Island BeachNorth Bali, Indonesia27.4°C
- 8Canggu BeachCanggu, Indonesia27.3°C
- 9Dreamland BeachPecatu, Indonesia27.3°C
- 10Batu Bolong BeachCanggu, Indonesia27.3°C
- 11Pererenan BeachCanggu, Indonesia27.3°C
- 12Virgin Beach BaliAmed & East Bali, Indonesia27.3°C
- 13Lovina BeachNorth Bali, Indonesia27.3°C
- 14Suluban Beach UluwatuUluwatu, Indonesia27.2°C
- 15Sanur BeachSanur, Indonesia27.1°C
- 16Legian BeachKuta, Indonesia27.1°C
- 17Kuta BeachKuta, Indonesia27.0°C
- 18Geger BeachNusa Dua, Indonesia27.0°C
- 19Melasti Beach BaliUngasan, Indonesia27.0°C
- 20Kelingking BeachNusa Penida, Indonesia27.0°C
- 21Diamond BeachNusa Penida, Indonesia26.9°C
- 22Amed BeachAmed & East Bali, Indonesia26.9°C
- 23Nyang Nyang BeachPecatu, Indonesia26.8°C
- 24Double Six BeachKuta, Indonesia26.7°C
- 25Batu Belig BeachKuta, Indonesia26.7°C
- 26Blue Lagoon Padang BaiAmed & East Bali, Indonesia26.7°C
- 27Pandawa BeachKutuh, Indonesia26.6°C
- 28Diamond Beach PenidaNusa Penida, Indonesia26.6°C
- 29Seminyak BeachKuta, Indonesia26.6°C
- 30Berawa BeachCanggu, Indonesia26.6°C
- 31Echo BeachCanggu, Indonesia26.6°C
- 32Crystal BayNusa Penida, Indonesia26.5°C
- 33Nusa Dua BeachNusa Dua, Indonesia26.5°C
- 34Balangan BeachJimbaran, Indonesia26.4°C
- 35Atuh BeachNusa Penida, Indonesia26.4°C
- 36Bingin BeachPecatu, Indonesia26.3°C
- 37Mertasari BeachSanur, Indonesia26.3°C
Swimming in the Bali — FAQ
How warm is the sea in the Bali in September?
The Indian Ocean off the Bali averages about 27.0°C in September, based on long-term monthly averages for this coast.
When is the best time to swim in the Bali?
The Bali is warmest in January (around 29.0°C) and coldest in July (around 27.0°C). There are typically 12 months a year when the water sits above 22°C.
What is the average yearly sea temperature in the Bali?
Across all twelve months, the sea in the Bali averages about 28.3°C.
Do you need a wetsuit to swim in the Bali?
In peak season (around January, ~29.0°C) most swimmers are comfortable without a wetsuit. Outside summer, when the water drops toward 27.0°C, a 3/2mm to 5/4mm wetsuit is recommended.