Castle Rock

St. Eustatius, Netherlands15 m maxadvanced

Conditions & tides

Castle RockSt. Eustatius

Fair · 4/5

conditions visualisation

Fair4/5

Some chop right now — best window today 8 AM–6 PM.

Wind10 kn SW

Current~0.3 kn SSW · model

Swell

0.5 m · 8s · NE

Water

30 °C

Max depth

15 m

Conditions through the day

7 AM7 PM

Calmest current near slack — 23:15 local

Sunrise 06:13 · Sunset 17:38 local

Show details

Tide · local

Outlook — select a day for full conditions

On-face swell 0.7 m — the component of the swell aimed at this site’s exposed face. 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

Castle Rock is a submerged seamount sitting in open water north of Komodo Island, exposed on all sides to the currents that sweep through the region. The rock itself is the attraction: a hard, rocky structure dived from around 15 m (50 ft) down to 40 m (130 ft), with the top of the seamount serving as the main gathering point for divers.

The site draws large pelagic species in numbers, with giant trevallies, barracuda, dogtooth tuna, white-tip reef sharks, and grey reef sharks all regularly encountered, along with dense schools of fusiliers moving through the blue water column above and around the rock.

Currents here run strong to very strong, and the site is rated advanced. The recommended technique is a negative entry to descend quickly, followed by deploying a reef hook at the top of the rock to hold position and watch the action. Slack tide is the right window to dive; the best season runs from April to November. Divers should stay alert to current changes throughout the dive.

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