Isla Canela (Ayamonte) Anchorage Guide
Also known as: Ayamonte anchorage, Guadiana mouth, Isla Canela
Isla Canela and the mouth of the Río Guadiana mark the border between Spain and Portugal — one of the most remarkable anchorages in the Gulf of Cádiz, with the unique distinction of straddling two countries. The Guadiana river forms the border for much of its length, and at the mouth the towns of Ayamonte (Spain) and Vila Real de Santo António (Portugal) face each other across the water. The Isla Canela is a low-lying sandy island resort development on the Spanish side. The anchorage in the river mouth or offshore combines the Atlantic approaches with the shelter of the tidal estuary. The bar at the river mouth requires careful tidal timing (similar to Sancti Petri). Once inside, the river gives outstanding shelter and the mud holding is excellent. The border crossing by dinghy is unusual and charming — Portuguese fresh bread in Vila Real de Santo António for breakfast. A memorable final Spanish anchorage before heading to the Algarve.
Quick Reference
GPS Coordinates
37°11.3'N 007°23.5'W
Depth
3–8m (above chart datum)
Bottom
sand, mud
Holding
Good HoldingProtected From
N, NE, NW, E
Exposed To
S, SW, W
Best Months
April, May, June, July, August, September, October
Anchoring Fee
Free
Permit
Not required
Recommended Anchor Alarm Radius
85m for 3–8m on sand/mud. Good holding but strong tidal current (up to 2 kt ebb) means the boat lies to the stream not the wind — allow for this in swinging circle and alarm setting. Guadiana bar crossing: minimum 2.5m at LW springs — enter on flood tide.
⚠ Gulf of Cádiz has 3–4m Atlantic tidal range — your boat swings significantly as the tidal current reverses. Set your alarm to account for the full swinging circle and check periodically during tidal changes.
Guadiana river mouth anchorage (off Isla Canela beach): 85m — Anchor in 3–7m on sand and mud off the SE end of Isla Canela, at the mouth of the Río Guadiana (the border river between Spain and Portugal).
Upstream anchorage in Guadiana river: 70m — If bar depth allows entry, proceed upstream into the Guadiana river for completely sheltered anchoring in 4–8m on excellent mud.
Anchoring Zones
Isla Canela (Ayamonte) has 2 distinct anchoring zones.
Zone 1: Guadiana river mouth anchorage (off Isla Canela beach)
- Depth: 3–8m (apply Atlantic tidal correction)
- Bottom: sand, mud
- Holding: Good Holding
- Protected from: N, NE, NW, E
- Exposed to: S, SW, W
- Recommended alarm radius: 85m
Anchor in 3–7m on sand and mud off the SE end of Isla Canela, at the mouth of the Río Guadiana (the border river between Spain and Portugal). The river mouth creates a strong tidal current — up to 2 kt on the ebb — which runs through the anchorage. The holding is good in sand over mud but the current means the boat lies to the current rather than the wind, and scope must be generous. The approach from seaward crosses the Guadiana bar — approximately 2.5m at LW springs, 4m at HW — enter on the flood tide. The Vila Real de Santo António (Portugal) ferry crosses frequently to Ayamonte (Spain) — keep clear of the ferry lane.
Zone 2: Upstream anchorage in Guadiana river
- Depth: 4–9m (apply Atlantic tidal correction)
- Bottom: mud
- Holding: Excellent Holding
- Protected from: N, NE, NW, E, W, S, SW
- Recommended alarm radius: 70m
If bar depth allows entry, proceed upstream into the Guadiana river for completely sheltered anchoring in 4–8m on excellent mud. Both banks — Spanish (Ayamonte side) and Portuguese (Vila Real de Santo António side) — offer sheltered anchoring once above the bar. The river is navigable for several miles upstream in reasonable depths. Excellent holding in deep river mud. The border crossing by dinghy from Spain to Portugal here is unique — anchor on one bank, dinghy to the other country for provisions.
Setting Your Anchor
The bottom at Isla Canela (Ayamonte) is primarily sand and mud with reliable holding when properly set. All depths are above chart datum — always calculate the current tidal height before approach using Cádiz, Huelva, or Tarifa tidal predictions (Spanish IHM tide tables available free at puertos.es). Allow for the full Atlantic tidal range of 3–4m at springs. Check the Posidonia DONIA app for the approach area to confirm no protected seagrass is present.
- Approach in good visibility — confirm the tidal height gives adequate depth for your draft. If there is a bar or shoal on the approach, calculate precisely.
- Calculate scope for maximum depth — at 3–8m plus up to 3m tidal rise, your maximum depth at HW may be 12m. Deploy minimum 7:1 scope accounting for the full tidal range.
- Lie to the current, not the wind — in tidal waters the boat swings on the tidal stream. Drop the anchor into the current and pay out chain steadily. Allow for the swinging circle to change direction as the tide reverses.
- Set firmly in reverse — 30–60 seconds moderate throttle astern to bury the anchor.
- Take a GPS bearing — note the set position and verify your swinging circle is clear of other boats and the shore on both the flood and ebb tidal directions.
Recommended anchor types: SPADE, Rocna, CQR, Delta.
Overnight Anchoring & Anchor Alarm
Overnight stays at Isla Canela (Ayamonte) are feasible but require careful monitoring — exposed to S and SW and W winds and swell.
Set your GPS anchor alarm to 85m radius before going below. 85m for 3–8m on sand/mud. Good holding but strong tidal current (up to 2 kt ebb) means the boat lies to the stream not the wind — allow for this in swinging circle and alarm setting. Guadiana bar crossing: minimum 2.5m at LW springs — enter on flood tide.
Atlantic tidal note: In the Gulf of Cádiz with 3–4m tidal range, Atlantic swell, and the risk of the Levante developing overnight, your anchor watch must be reliable. The Levante (E wind) can strengthen to F7–8 within a few hours — if it is forecast, ensure you are in a W-facing anchorage (Bolonia, Bahía de Algeciras) rather than an E-facing position. Check the Tarifa MRCC forecast (VHF Ch 10) before settling for the night.
April–October. The last Spanish anchorage before the Portuguese Algarve — typically used as an overnight staging stop or a 2–3 day break before Portugal. Winter: viable in settled conditions but the bar crossing in Atlantic swell is not recommended.
Navigation Hazards
- Guadiana bar: 2.5m at LW springs — tidal timing critical; enter on flood tide only
- Strong tidal current in river mouth: up to 2 kt on ebb — anchor with generous scope
- Ayamonte–Vila Real de Santo António ferry crosses frequently — keep clear of ferry lane
- Atlantic swell in the outer anchorage area (Isla Canela beach) — enter river for shelter in swell
- International border — customs/immigration requirements if entering Portugal; carry passports
Rules & Regulations
- Anchoring fee: Free
- Key restrictions: International border river — both Spanish and Portuguese maritime authorities may be encountered. Passports required if going ashore in Portugal. Ayamonte–Vila Real de Santo António ferry has priority in the crossing lane. Speed limit 3 kt in the river. No anchoring directly in the main shipping channel (marked).
This is Atlantic water — Posidonia seagrass (protected Mediterranean species) is not present in Gulf of Cádiz anchorages. Standard good anchoring practice applies: avoid anchoring over rocky ground, use appropriate chain length, and set firmly before considering the anchor secure.
Facilities
- Fresh water: Not available on site — nearest: Ayamonte (2nm)
- Fuel: Not available — nearest: Ayamonte (2nm)
- Restaurant: Ayamonte town (2nm, dinghy to town quay) has excellent restaurants — try the bacalhau (salt cod, Portuguese influence). Vila Real de Santo António (Portugal, across the river by dinghy/ferry) has supermarkets and pastelerias.
- Provisions: Available
Skipper's Tips
- This is the classic last-stop-in-Spain anchorage before heading to Portugal. Stock up in Ayamonte (Spanish prices, good supermarkets).
- The ferry to Vila Real de Santo António (Portugal) runs every 30 minutes — take it for Portuguese pastéis de nata (custard tarts) and different groceries.
- Guadiana river upstream from Ayamonte: spectacular if you have time — the river carves through hills for 30nm with no towns, just cork oaks and cistus.
- Tidal calculation for the bar: use Huelva tide tables (nearest station). The bar depth at LW springs is approximately 2.5m — for 1.8m draft, enter when tidal height exceeds 1.0m above LW.
A note on this guide: Data researched from multiple sailing sources and provided in good faith. Gulf of Cádiz conditions change rapidly — always check current tide tables (puertos.es), NAVTEX bulletins, Tarifa MRCC traffic reports (VHF Ch 10), and bar conditions before entry into tidal estuaries. Use a GPS anchor alarm and never rely solely on a guide for navigational decisions. This guide is not a substitute for Admiralty charts or official pilot books.
Sleep peacefully at Isla Canela (Ayamonte)
Safety Anchor Alarm monitors your GPS position continuously — essential in the Gulf of Cádiz where Atlantic tides of 3–4m, strong tidal currents, and the Levante wind that can reach F8 overnight require a reliable anchor watch at all times.
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