5-20m
    North Sea Coast, Denmark
    Lynæs

    Alholm Rev

    Best months: Jul–Aug

    Protected Area

    Lynæs

    Why dive here

    With 95+ marine species recorded in the area - including seals & sea lions, sea turtles and jellyfish lake - Alholm Rev offers some of North Sea Coast's richest reef diving. Water ranges 3-19°C, warmest July, August, September.

    Best timeJul–Aug
    WetsuitA 5mm wetsuit
    Marine lifeSeals & Sea Lions, Sea Turtles and Jellyfish Lake · 95+ species recorded
    Water3-19°C · warmest July, August, September
    CharacterReef dive · max 5-20m

    Alholm Rev, for us, is a real surprise package in the often-overlooked Danish North Sea. Forget your tropical blues; here it’s about a different kind of beauty, a rugged, resilient ecosystem thriving in cooler water. We love the sheer density of life clinging to every surface of the reef, like the Hairy Sea-mats creating intricate tapestries, often completely covering the rocks. You'll find yourself searching for the subtle movements of specked sea-louse or admiring the robust architecture of acorn barnacles. It’s an excellent spot for macro enthusiasts, or anyone who appreciates the smaller details. Keep an eye out for the bull rout, often tucked into crevices, and the energetic common shore crabs scuttling about. Conditions can be challenging, so pick your day carefully; calmer seas make all the difference for enjoying the intricate bottom. We’d suggest going at slack tide if you can time it right. You might even catch a glimpse of a harbour porpoise patrolling the deeper sections, a truly special bonus. It’s a site that rewards patience and a keen eye, perfect for divers who prefer quiet observation over big pelagics.

    Typical Alholm Rev Dive Profile

    5mSafety Stop0m5m max~60 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

    Cold water this month (avg 13°C). Drysuit or thick wetsuit (7mm+) recommended.

    Today06:3517:2410h 49m daylightGolden hour 16:34

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    Conditions

    Ocean conditions, forecast and tides for Alholm Rev

    Alholm Rev Ocean Conditions

    Monthly averages for Alholm Rev, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (55.31, 9.86) (1km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    13°C

    56°F · Range: 10.7–16.8°C

    Air Temperature

    11°C

    52°F

    Wind Speed

    7.69 m/s

    14.9 knots

    Atmospheric Pressure

    1010.5 hPa

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

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