New England, United States
    Harbor Island

    City Of Portland

    Best months: Jul–Sep

    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.

    Best timeJul–Sep
    WetsuitA 5mm wetsuit
    Marine lifeNurse Sharks · 35+ species recorded
    Water4-19°C · warmest July, August, September
    CharacterWreck dive

    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.

    Today05:4517:0311h 18m daylightGolden hour 16:24

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    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)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    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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