Roskilde Fjord — Frederikssund
Frederikssund anchorage · Roskilde Fjord south · Isefjord approach
55°50.0'N 12°01.9'E
Depth
2–5m
Bottom
mud
Alarm Radius
60m
Holding
Excellent
Recommended Anchor Alarm Radius
60m
60m for typical overnight on thick mud. The fjord is calm regardless of outside wind. Reduce to 45m in flat conditions. Keep clear of the central channel if commercial or recreational traffic is expected.
About This Anchorage
Roskilde Fjord is one of Scandinavia's most historically significant waterways — the 36km inland sea that leads to the ancient Viking capital of Roskilde, site of the UNESCO World Heritage Cathedral (burial place of Danish kings since 1086) and the remarkable Viking Ship Museum. The fjord is a closed system — no swell, minimal tidal range, and protection from all wind directions. The anchorage near Frederikssund (at the fjord's southern junction with Isefjord) is on thick mud with excellent holding. Maximum depths 6m in the main channel. Eelgrass is extensive — anchor only in the marked sandy/muddy channel. The Viking Ship Museum in Roskilde (25nm south) is accessible by dinghy or bus from Frederikssund.
Protected From
N · NE · E · S · SE · W · SW · NW
Exposed To
None (fully sheltered)
Anchoring Rules
- Anchoring fee
- Free (anchoring); marina fee approx DKK 160–200/night
- Permit required
- No
Restrictions: Eelgrass throughout fjord — anchor in central channel only; speed limit 5kt within 300m of shore; Frederikssund bridge air draught limit — check before transiting south; some nature protection zones in upper fjord.
Hazards
- !Eelgrass extensive throughout fjord — anchor in central channel only; DKK 10,000 fine
- !Frederikssund bridge air draught limit — check clearance before proceeding south toward Roskilde
- !Narrow channel in upper fjord (north of Frederikssund) — minimum depth 2.0m in places
- !Speed limit enforced by police in summer
- !Dinghy traffic and kayakers in summer — maintain speed limit and watch carefully
Skipper's Tips
- →Roskilde is accessible by bus from Frederikssund (25 minutes) — the Viking Ship Museum (Vikingeskibsmuseet) is world-class; allow a full day
- →The fjord offers excellent kayaking and dinghy sailing — rent from Frederikssund Sailing Club
- →The Viking spectacle outdoor theatre (June–July) is performed on the fjord bank — spectacular if you time your visit
- →Upper Roskilde Fjord (north of Frederikssund) is shallow and narrow — suitable only for bilge-keelers and centreboarders
- →Copenhagen is 35km by train from Frederikssund — leave the boat and spend a day in the capital
Facilities
Frederikssund town has supermarkets, restaurants, and all services. Viking spectacle (outdoor summer festival) runs June–July.
Nearest provisions: Frederikssund town (1nm)
Best Months & Season
May, June, July, August, September
May–September. The fjord is calm and navigable all summer. Historical sites make this a must-do for culture-minded sailors.
Recommended Anchor Types
Nearby Anchorages
Set Your Anchor Alarm to 60m
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