Gamat Bay

Nusa Penida, Bali, Indonesiareef30 m maxbeginner

Conditions & tides

Channel site — tidal current funnels through here and can run fast, changing quickly with the tide. It is usually strongest around mid-tide and eases near the slack windows below. Dive with a local operator who knows the timing.

Gamat BayNusa Penida

Good · 5/5

conditions visualisation

Good5/5

Calm and diveable right now — best window today 8 AM–6 PM.

Wind5 kn SSW

Current~1.8 kn WNW · model

Swell

1.0 m · 8s · SSW

Water

30 °C

Max depth

30 m

Conditions through the day

7 AM7 PM

Calmest current near slack — 15:15 & 04:00 local

Sunrise 05:48 · Sunset 18:16 local

Show details

Tide · local

Outlook — select a day for full conditions

On-face swell 0.2 m — the component of the swell aimed at this site’s exposed face. Strong-current reef: plan a drift and enter near the slack windows above. Current is a regional model value (Copernicus, ~9 km grid) — a guide to the area, not a precise reef measurement. Imagery © Esri · not depth or visibility.

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.

Dived here today? How were conditions vs. what we showed?

About this site

Gamat Bay is a sheltered bay on the west coast of Nusa Penida, about 30 minutes by boat, with an impressive reef wall dropping away at the edge of the bay. It requires Open Water certification, and depths run from 5 to 30 metres or more.

The wall has cracks and crevices that shelter reef life, with the occasional turtle. Look out into the blue for sharks, rays and Mola mola in season. Coming back up the slope you pass table corals and coral bommies full of sheltering fish, and the shallow main part of the bay is a good place for a safety stop in some of the clearest water around Nusa Penida. In calm conditions the 10 to 20 metre range is good for macro life among table corals, bommies and slopes covered in sponges and whip corals, with frogfish, nudibranchs and mantis shrimp, and reef sharks sometimes seen.

Visibility is 15 to 30 metres. Currents are mild to moderate but can be tricky at certain points.

AI-written site guide

Marine life here

Confirmed by our research team, reported by independent divers, or observed nearby via iNaturalist — each entry is labelled with its source.

Sea turtleSea turtleReported here · unconfirmed
Mantis shrimpMantis shrimpReported here · unconfirmed
Mola mola (ocean sunfish)Mola mola (ocean sunfish)Confirmed present · 5 independent sources
Moorish IdolZanclus cornutusReported here · unconfirmed
Blacklip ButterflyfishChaetodon kleiniiReported here · unconfirmed
Pacific TrumpetfishAulostomus chinensisReported here · unconfirmed
Magnificent ChromodorisChromodoris magnificaReported here · unconfirmed
Whitecheek SurgeonfishAcanthurus nigricansReported here · unconfirmed
Clark's AnemonefishAmphiprion clarkiiReported here · unconfirmed
Reef Manta RayMobula alfrediReported here · unconfirmed
Blackback ButterflyfishChaetodon melannotusReported here · unconfirmed
Blue LinckiaLinckia laevigataReported here · unconfirmed
FrogfishFrogfishReported here · unconfirmed
NudibranchNudibranchConfirmed present · 4 independent sources
TrevallyTrevallyReported here · unconfirmed
TunaTunaReported here · unconfirmed
ClownfishClownfishReported here · unconfirmed
AngelfishAngelfishReported here · unconfirmed
Manta rayManta rayReported here · unconfirmed
BarracudaBarracudaReported here · unconfirmed
LionfishLionfishConfirmed present · 2 independent sources