Sydøstrev
Protected Area
Sejerø Bugt og Nekselø
Why dive here
With 95+ marine species recorded in the area - including seals & sea lions, sea turtles and jellyfish lake - Sydøstrev offers some of North Sea Coast's richest reef diving. Water ranges 3-19°C, warmest July, August, September.
Sydøstrev often gets overlooked, nestled as it is off Denmark's North Sea coast, but for those willing to brave the chill, it’s a truly rewarding dive. We’ve found the best days are when the sea has been calm for a few days, letting the visibility stretch out past 10 meters, painting the place in shades of green and blue. What makes it special for us is the sheer resilience of life here. You’ll weave through low-lying rocky structures, not towering coral gardens, but every surface is a tapestry of Hairy Sea-mats and Blue Mussels, swaying gently with the surge. Keep an eye out for the unusual residents. We’ve had some fantastic encounters with Starry Rays gliding past, and the Common Pipefish blend so well into the scenery you have to really look. It’s also a surprisingly good spot for macro, with tiny anemones clinging to the rocks and the occasional Sand Mason poking its head out. Our favourite time to dive here is late summer; the water is at its warmest, which means "less bracing," and there’s a noticeable uptick in juvenile fish, including tiny anchovies darting about. This isn’t a dive for beginners; the conditions can be temperamental, but for experienced cold-water divers, it offers a raw, wild beauty that’s hard to beat.
Safety Notes
Cold water this month (avg 13°C). Drysuit or thick wetsuit (7mm+) recommended.
Reviews for Sydøstrev
Conditions
Ocean conditions, forecast and tides for Sydøstrev
Sydøstrev Ocean Conditions
Monthly averages for Sydøstrev, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (55.31, 9.86) (1km away)
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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