Beaches, lakes & rivers

Where to swim, paddle and cool off in Indonesia, and how clean the water is.

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BeachesThe best stretches near Bali (Canggu, Ubud, Sanur) and Jakarta, Blue Flag or equivalent ratings, lifeguard seasons and facilities.

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LakesSwimming lakes, water quality reports and lakeside towns.

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RiversSafe swimming spots, kayaking and rafting, and rivers to avoid.

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Water qualityOfficial bathing-water monitoring, seasonal algae and jellyfish, and whether tap water is drinkable.

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SeasonTropical; wet season Nov–Mar, dry season Apr–Oct. Bali's highlands are cooler and wetter.

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HazardsCurrents, rips, marine life and flags. Severe-weather risk rating 75/100.