20m
    Cornwall & Devon, United Kingdom

    HMS SESAME (PROBABLY)

    Best months: Jul–Sep

    Why dive here

    With 176+ marine species recorded in the area - including blue sharks, dolphins, dwarf minke whales, humpback whales and ocean sunfish (mola mola) - HMS SESAME (PROBABLY) offers some of Cornwall & Devon's richest wreck diving. Water ranges 10-18°C, warmest July, August, September.

    Best timeJul–Sep
    WetsuitA 5mm wetsuit
    Marine lifeBlue Sharks, Dolphins, Dwarf Minke Whales, Humpback Whales and Ocean Sunfish (Mola Mola) · 176+ species recorded
    Water10-18°C · warmest July, August, September
    CharacterWreck dive · max 20m
    StandoutExceptional marine biodiversity

    The HMS Sesame, or what we strongly suspect is the Sesame, rests upright in about 20 metres of water off the coast of Cornwall. It’s a proper dive, feeling its history as you descend into the often-murky green. We love the way the wreck has settled, largely intact, offering easy penetration for those with the right training and a good guide. You'll find schools of pollack hanging in the superstructure, darting into the shadows as you approach. Keep an eye out for conger eels too, peering from the deeper recesses. While the visibility can be challenging, typically around 5-10 metres on an average day, we think that only adds to the atmosphere, making those moments when a feature emerges from the gloom all the more dramatic. Our favourite part is exploring the bridge area, though we’d suggest going at slack water, as currents here can pick up. It's a dive for those who appreciate a good wreck with a story, not just perfect visibility.

    Typical HMS SESAME (PROBABLY) Dive Profile

    10m20mSafety Stop0m20m max~30 min estimated bottom time

    Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.

    Safety Notes

    Depth of 20m - Advanced Open Water 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.

    Today06:1917:2311h 5m daylightGolden hour 16:40

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    Conditions

    Ocean conditions, forecast and tides for HMS SESAME (PROBABLY)

    HMS SESAME (PROBABLY) Ocean Conditions

    Monthly averages for HMS SESAME (PROBABLY), sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (50.44, -2.73) (3km away)

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    October Averages

    Sea Temperature

    17°C

    62°F · Range: 15.1–17.5°C

    Air Temperature

    13°C

    56°F

    Wind Speed

    8.14 m/s

    15.8 knots

    Atmospheric Pressure

    1011 hPa

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data

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