Batu Mandi
Conditions & tides
Scored by DiveConnect's site-physics model
Marine forecast via Copernicus Marine. Score is a rule-based guide from swell/wind vs. the site's exposure — always dive your own assessment.
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About this site
Batu Mandi, which translates as Shower Rock, lies on the last corner of the North Sulawesi mainland before Lembeh becomes visible. The beach is deserted, with forest reaching the shoreline.
The dive follows a mini wall that drops to around 15 m and then turns into a white sandy slope with pinnacles rising from the seabed. Currents here can be strong and unpredictable, and the site is rated advanced.
It is all about critter hunting. The main quest is the giant frogfish, which turns up in several colour variations, and flatworms and nudibranchs are relatively common sightings alongside the usual reef fish.
Marine life here
Confirmed by our research team, reported by independent divers, or observed nearby via iNaturalist — each entry is labelled with its source.
Dusky NembrothaNembrotha kubaryanaReported here · unconfirmed
Pink Skunk AnemonefishAmphiprion perideraionReported here · unconfirmed
Clark's AnemonefishAmphiprion clarkiiReported here · unconfirmed
Varicose Wart SlugPhyllidia varicosaReported here · unconfirmed
Blue LinckiaLinckia laevigataReported here · unconfirmed
Vermiculate AngelfishChaetodontoplus mesoleucusReported here · unconfirmed
Yellow BoxfishOstracion cubicumReported here · unconfirmed
Mantis shrimpMantis shrimpConfirmed present · 2 independent sources
OctopusOctopusReported here · unconfirmed
FrogfishFrogfishReported here · unconfirmed
NudibranchNudibranchConfirmed present · 2 independent sources
Harlequin ShrimpHymenocera pictaReported here · unconfirmed
DugongDugongReported here · unconfirmed
ParrotfishParrotfishReported here · unconfirmed
GrouperGrouperReported here · unconfirmed
Napoleon (humphead) wrasseNapoleon (humphead) wrasseReported here · unconfirmed
BarracudaBarracudaReported here · unconfirmed
ClownfishClownfishReported here · unconfirmed
TriggerfishTriggerfishReported here · unconfirmed
Pygmy SeahorseHippocampus bargibantiObserved near here · iNaturalist
Banggai CardinalfishPterapogon kauderniObserved near here · iNaturalist
Barred ShrimpgobyCryptocentrus fasciatusObserved near here · iNaturalist
Durable tips from divers — access, hazards, marine life, facilities. For day-of conditions, use the report tool in the conditions card above.
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