HM MGB 663
Why dive here
With 46+ marine species recorded in the area - including dolphins, sea turtles and cuttlefish - HM MGB 663 offers some of Istria Peninsula's richest wreck diving. Water ranges 12-26°C, warmest July, August, September.
The HM MGB 663 sits upright at 34 metres, a proper old gunboat that makes for a cracking dive. We love the way it’s settled on the seabed, almost as if it’s still on patrol, just a bit… sleepy. Dropping down, you’ll first notice the outline of the stern, remarkably intact, with the deck guns still pointing skyward, coated in thick layers of yellow and purple sponges. It’s not a huge wreck, but there’s plenty to explore. We always enjoy poking around the wheelhouse, now home to clouds of tiny glassfish, their silver scales flickering in your torch beam. Look closely for scorpionfish camouflaged on the hull plates, and we often spot conger eels peeking from beneath twisted metal. The bow section has seen better days, showing clear signs of the mine blast, but even here, anemones cling to every surface. We’d suggest saving this one for a calm day, as the visibility can drop with a swell, and aim for a morning dive before any boat traffic kicks up the particulates. It’s a dive that suits those who appreciate a bit of history with their marine life, a quiet exploration of a moment frozen in time.
Typical HM MGB 663 Dive Profile
Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.
Safety Notes
Deep dive (34m) - monitor air consumption closely. Advanced certification recommended.
Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.
Always perform a 3-minute safety stop at 5m before surfacing.
Nearest Dive Centres to HM MGB 663
Dive shops near HM MGB 663
View all dive centres in Istria PeninsulaReviews for HM MGB 663
Conditions
Ocean conditions, forecast and tides for HM MGB 663
HM MGB 663 Ocean Conditions
Monthly averages for HM MGB 663, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (45.08, 14.15) (21km away)
October Averages
Sea Temperature
20°C
68°F · Range: 18.4–22.3°C
Current Speed
3.16 cm/s
Direction: W (288.4°)
Salinity
37.74 PSU
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)
Plan & book
Ways to dive Istria Peninsula, from day trips to liveaboards.
Day trips & courses
via GetYourGuideGuided dives, courses and snorkel trips with instant booking.
Find dive trips in Istria PeninsulaPlaces to stay
via Booking.comHotels and dive resorts near Istria Peninsula.
Search stays in Istria PeninsulaDive insurance
Most travel insurance excludes or limits scuba. Check what you need before you go.
Dive insurance explainedPartner links: we may earn a commission if you book, at no extra cost to you. How we make money
Where to Stay near HM MGB 663
Prices from Booking.com. We may earn a commission at no extra cost to you.
