City Of Portland
Protected Area
Harbor Island
Why dive here
With 35+ marine species recorded in the area - including nurse sharks - City Of Portland offers some of New England's richest wreck diving. Water ranges 4-19°C, warmest July, August, September.
Diving New England wrecks often means battling conditions, but the *City of Portland* makes the effort worthwhile. This isn’t a pretty reef dive, it’s a journey into history, cold and dark, but utterly captivating. We think it’s one of the region’s standout wrecks, a ghost ship frozen in time. The *City of Portland* rests deep, around 85 metres, so this is serious technical diving territory. You’ll need the training and the gear, but the rewards are immense. We’ve been down when the thermocline hits, and the world above disappears, leaving you in a ghostly blue twilight. Visibility can be decent, sometimes 15 metres, enough to appreciate the scale. The bow, draped in fishing nets like a shroud, is particularly haunting. You’ll see the massive propeller, the rudder, and parts of the engine room if you’re up for a penetration. It’s colonised by anemones, their tentacles waving in the slight current, and often we’ve seen cod lurking in the shadows, big, curious fish that seem to guard the wreck. It’s an advanced dive, no question, but for those with the skills, it offers an incredible, tangible connection to the past. Go on a slack tide, if you can, to really soak it in.
Safety Notes
Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.
Cold water this month (avg 15°C). Drysuit or thick wetsuit (7mm+) recommended.
Reviews for City Of Portland
Conditions
Ocean conditions, forecast and tides for City Of Portland
City Of Portland Ocean Conditions
Monthly averages for City Of Portland, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (42.6, -70.6) (0km away)
October Averages
Sea Temperature
15°C
59°F · Range: 12.8–18.1°C
Air Temperature
10°C
50°F
Wind Speed
3.78 m/s
7.3 knots
Atmospheric Pressure
1017 hPa
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data
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