Castle Rock

Olongapo, Luzon, Philippines

Explore more dive sites in Philippines

Conditions & tides

Castle RockOlongapo

Good · 5/5

conditions visualisation

Good5/5

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

Wind3 kn E

Current~0.1 kn SSW · model

Swell

0.1 m · 5s · SW

Water

30 °C

Conditions through the day

7 AM7 PM

Calmest current near slack — 04:00 PM & 12:30 AM local

Sunrise 05:47 AM · Sunset 05:53 PM local

Show details

Tide · local

Outlook — select a day for full conditions

On-face swell 0.0 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 lies in Subic Bay, near Olongapo on the west coast of Luzon in the Philippines. The bay is a former US naval base area now known for a mix of wreck and reef diving sites accessible from the town.

AI overview

Marine life here

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

Anna's ChromodorisChromodoris annaeReported here · unconfirmed
Coi's GoniobranchusGoniobranchus coiReported here · unconfirmed
Martin's cowrieRansoniella martiniReported here · unconfirmed

Diver notes

Durable tips from divers — access, hazards, marine life, facilities. For day-of conditions, use the report tool in the conditions card above.

No notes yet. Dived here? Be the first to leave a tip.

Contribute to this site

Share a write-up or a photo. Submissions are reviewed before they appear on the page.

0/4000 (min 40)

Nearby dive sites

Nabasan ReefOlongapo, Philippines0.9 km Lighthouse ReefOlongapo, Luzon, Philippines1.5 km Landing Craft UtilityOlongapo, Philippines1.5 km Marker Buoy 10Olongapo, Luzon, Philippines1.6 km Arizona MuckOlongapo, Luzon, Philippines1.7 km F4 Phantom WreckOlongapo, Philippines2.3 km

Shops that dive here

No shops have listed this site yet.