Rota Bay Anchorage Guide

The Anchorage

Anchor in 4–8m on sand and mud on the E side of Rota, clear of the US Naval Base restricted zone to the W and NW. The Bay of Cádiz gives good protection from the Atlantic Poniente (W wind). The naval base boundary is marked with buoys and signs — do NOT enter the restricted zone. The civilian anchorage is in the open bay to the E of Rota town. Bottom is sand over mud — good holding once set. Exposed to E through SE — in easterly conditions, shelter in the inner Bay of Cádiz closer to Cádiz itself.

Setting Your Anchor

The bottom at Rota Bay 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.

1. 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.
2. Calculate scope for maximum depth — at 4–9m plus up to 3m tidal rise, your maximum depth at HW may be 13m. Deploy minimum 7:1 scope accounting for the full tidal range.
3. 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.
4. Set firmly in reverse — 30–60 seconds moderate throttle astern to bury the anchor.
5. 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, Delta, CQR.

Overnight Anchoring & Anchor Alarm

Overnight stays at Rota Bay are feasible but require careful monitoring — exposed to E and SE and S winds and swell.

Set your GPS anchor alarm to 90m radius before going below. 90m for 4–9m on sand/mud. Good holding. E/SE exposure — monitor in easterly conditions. CRITICAL: Naval Base restricted zone to W is strictly enforced — maintain 500m+ clearance from the zone boundary. Tidal range 3m.

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.

May–October. The Bay of Cádiz is one of the most sheltered Atlantic anchorages in southern Spain — viable year-round for experienced crews. The main limitation is the E exposure in Levante conditions.

Navigation Hazards

• US Naval Base restricted zone — strictly enforced; marked with yellow buoys and signs
• US Navy and Spanish Navy vessel traffic — military ships have absolute priority
• Bay of Cádiz commercial ferry traffic (Cádiz–El Puerto de Santa María route)
• Tidal range 3m — anchor with adequate scope
• Exposed to E/SE — uncomfortable in easterly conditions

Rules & Regulations

• Anchoring fee: Free
• Key restrictions: CRITICAL: US Naval Station Rota restricted zone — clearly marked with buoys. Do NOT enter restricted zone under any circumstances. Vessels approaching the zone will be warned off by US Navy patrol craft. Keep 500m+ clearance. VHF Ch 16 monitored by base security.

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: Rota (1nm)
• Fuel: Not available — nearest: Rota (1nm)
• Restaurant: Rota town (1nm by dinghy or short walk from beach) has good restaurants, supermarkets, and fresh fish.
• Provisions: Available

Skipper's Tips

1. The Bay of Cádiz has a long tidal delta extending S — the approach from outside requires careful attention to the marked channels in shallow water.
2. Cádiz city (8nm S across the bay) is one of the oldest cities in Europe — founded by the Phoenicians. Excellent day trip by ferry from the nearby ferry terminal.
3. US Navy personnel from the base use Rota's beaches and restaurants — the town has an unusual American-Spanish mix that results in surprisingly good US-style provisioning.
4. In summer, the Bay of Cádiz is well-protected from Atlantic swell — a comfortable anchorage for crews who have been battling the Gulf of Cádiz swell.