Ilha Berlenga (Main Anchorage)
Berlenga Grande · Berlenga SE Anchorage · Cova do Sonho E-side
39°24.5'N 09°30.1'W
Depth
5–15m
Bottom
sand
Alarm Radius
80m
Holding
Fair
Recommended Anchor Alarm Radius
80m
80m in 5–15m on mixed sand/rock. Use trip line — rocky patches near shore. July–August mooring buoys are mandatory under UNESCO Biosphere Reserve rules. In peak season, buoy lines are short — 50–60m radius sufficient on buoy. In other months, anchor on sandy patches (snorkel to verify) and set 80m alarm. Any SE/E deterioration is the departure trigger: 10nm back to Peniche is the only safe refuge.
About This Anchorage
Ilha Berlenga Grande is one of Portugal's most extraordinary sailing destinations — a granite rock island 10nm offshore from Peniche, part of the UNESCO Biosphere Reserve declared in 1984, the only overnight anchorage on the Atlantic coast between Cascais and Viana do Castelo. The island is dominated by the 17th-century Fort of São João Baptista (1644), connected to the island by a dramatic causeway bridge and now operating as a hostel (book months ahead). Crystal-clear Atlantic water, rock arches, and sea caves surround the island. The crossing from Peniche is exhilarating in the morning calm but can become violent when the Nortada builds by noon. Cory's Shearwaters nest in the rock crevices and circle overhead at dusk in their thousands — an unforgettable natural spectacle. The ICNF nature reserve rules are strictly enforced: no littering, no fires, no camping, no disturbing nesting seabirds.
Protected From
N · NW · W
Exposed To
S · SE · E
Anchoring Rules
- Anchoring fee
- Free anchoring (May–Jun, Sep) when not on mandatory buoy period. Buoy fee Jul–Aug.
- Maximum stay
- 2 days
- Permit required
- Yes
- Permit details
- Contact Peniche Port Authority (VHF Ch. 16 / +351 262 780 130) before departure for permit and current buoy availability. In July–August, mooring buoys are mandatory — free anchoring prohibited during peak season.
- Mooring buoy fee
- Mooring buoy fee applies in July–August. Confirm current rate with Peniche Port Authority.
Restrictions: UNESCO BIOSPHERE RESERVE / RESERVA NATURAL DAS BERLENGAS: Mandatory mooring buoys July–August. Maximum stay 48h. No camping, no fires, no littering. No disturbing nesting seabirds (Cory's Shearwaters) or marine mammals. ICNF ranger patrols. Tourist day-trip boats and the Peniche ferry (Viamar) operate 09:00–18:00 — do not obstruct ferry dock or day-boat buoys.
Setting Your Anchor
In Atlantic anchorages, use a minimum 7:1 scope — the combination of tidal range (up to 3.5m on spring tides) and overnight Atlantic swell requires generous chain deployment. Before settling, assess the swell period: long-period Atlantic swell (10–16 seconds) creates a slow roll that can walk the anchor across mixed sand/rock bottoms. At Ilha Berlenga (Main Anchorage), anchor in 5–15m on sand bottom and set the alarm to 80m. If mooring buoys are available (mandatory July–August at the Berlengas), take a buoy before anchoring — it provides better holding and keeps you compliant with the UNESCO Biosphere Reserve rules.
Hazards
- !CROSSING (10nm offshore): The Berlengas crossing is fully exposed to Atlantic swell and Nortada — depart Peniche 07:00–08:00 to arrive and anchor before the Nortada builds; return before 11:00–12:00; NEVER cross in F4+ Nortada
- !July–August mooring buoys are MANDATORY — do not anchor illegally; ICNF ranger will enforce and fine; arrive early for a buoy (first-come-first-served)
- !Mixed sand/rock bottom — trip line essential; rocky anchor ground near shore; anchor well outside 20m depth line for sandy patches
- !Any SE/E wind deterioration makes the anchorage untenable immediately — boats have been trapped here for days in NW swell; monitor the forecast obsessively
- !ORCA RISK on the crossing — check orcas.pt before departure from Peniche; slow to <3 knots if orcas approach
- !Nesting Cory's Shearwaters: do not shine lights at the birds at night (fatally disorienting to chicks); strict ICNF wildlife disturbance rules apply
Skipper's Tips
- →Call Peniche Port Authority (VHF Ch. 16) before departing — they confirm current buoy availability, anchoring rules, and any reserve closures
- →Depart Peniche at 07:00 maximum to complete the 10nm crossing in morning calm and secure a buoy or anchoring spot before day-trip boats arrive at 09:00
- →The Fort of São João Baptista hostel (book via pousadas.pt months ahead) is one of the most atmospheric overnight experiences in Portugal — if the budget allows, combine a hostel night with the boat anchorage
- →Snorkelling around the rock arches and Furado Grande tunnel (boat passage at HW in calm conditions) is spectacular — visibility routinely >20m
- →The Cory's Shearwater colony returns to the island at dusk — thousands of birds calling and wheeling overhead; stay on deck for this natural spectacle
Facilities
One small seasonal restaurant (O Bernardo) at the fort harbour — simple grilled fish, drinks. Book ahead in high season. Ferry brings day-trippers from Peniche (approximately 1 hour crossing).
Nearest provisions: Peniche town (10nm)
Best Months & Season
May, June, September
May–September. July–August is peak season with mandatory buoys, crowded conditions, and maximum day-tripper traffic. May–June and September are the best months — fewer boats, mooring buoys not mandatory, seabird colony active. The crossing is weather-dependent year-round — weather window planning is essential. Winter: not viable for overnight; Atlantic fronts make the crossing dangerous.
Recommended Anchor Types
Nearby Anchorages
Sleep Peacefully at Ilha Berlenga (Main Anchorage)
Atlantic overnight swell and the Nortada can change conditions fast — a boat secure at anchor in the evening can be dragging by midnight. Safety Anchor Alarm monitors your GPS position continuously, alerting you the moment your anchor moves beyond 80m. Essential for Atlantic overnight anchorages where conditions change without warning.
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