Hydra Town Anchorage Guide

Anchoring Zones

Hydra Town has 2 distinct anchoring zones, each with different depth, holding, and exposure characteristics. Choose the zone that matches your boat size and the expected overnight conditions.

Setting Your Anchor

The bottom at Hydra Town is primarily sand and rock with variable holding that requires extra attention. Use the following approach:

1. Approach slowly and check your depth sounder on the way in. At 3–6m, deploy at minimum 7:1 scope (42m chain at 6m depth).
2. Drop into the wind or current and pay out chain steadily as the boat drifts back — do not allow chain to pile on the anchor.
3. Set firmly in reverse. Apply moderate throttle astern for 30–60 seconds. The chain should tighten without the boat moving backwards.
4. Snorkel to verify. Given the fair holding here, it is strongly recommended to snorkel down and visually confirm the anchor is buried in sand, not resting on rock.

Recommended anchor types for this bottom: Rocna, Mantus, Spade. See our guide to anchor types by bottom for detailed comparisons.

Overnight Anchoring & Anchor Alarm

Overnight stays at Hydra Town are feasible but require monitoring. The anchorage is exposed to S and SE and SW winds.

Set your GPS anchor alarm to 40m radius before going below for the night.40m alarm radius for the town quay position — primarily a position-drift alarm given the stern-to berth limits movement. The mixed sand/rock bottom gives only fair holding, so the alarm is important: anchor movement under ferry wash or sudden S wind is a real risk. If a S swell develops overnight, expect the alarm to trigger as the boat surges — this is a warning sign to tighten lines or depart. Note that Mandraki Bay (1nm W) is the preferred free-swinging anchorage near Hydra — the town quay is a convenience stop, not an overnight anchorage in poor conditions.

Hydra is a year-round destination for visitors but sailing-wise, May–June and September are ideal: the town is lively but not overwhelmed, and the anchorage is less stressed. July–August sees the harbour completely full by early afternoon every day — reserve berths or use Mandraki. Hydra hosts the Miaoulia Festival (June) commemorating Admiral Miaoulis — spectacular fireworks but the harbour is very crowded that weekend.

Navigation Hazards

• Open S and SE: southerly swell causes heavy surge on the town quay — boats bang against the wall and lines can snap; depart for Mandraki if any S swell develops
• Ferry and hydrofoil wash: multiple daily Flying Dolphin departures create sudden, large wash that can drag anchors on the rock bottom or snap stern lines
• Rock patches in the harbour bottom: holding is only fair; re-anchoring may be necessary if anchor skates on rock on the first drop
• Very busy in July–August: harbour fills completely by afternoon; arrive before 11:00 for any chance of a quay berth
• No fuel available on Hydra island — fuel at Poros (14nm) or Spetses (9nm) before or after visit
• Harbour master may redirect late arrivals to Mandraki if town quay is full

Rules & Regulations

• Permit: Not required beyond standard Greek DEKPA transit log
• Anchoring fee: Port dues apply for town quay berth — harbour master collects (~€15–25/night depending on LOA)
• Mooring buoys: Available — Some mooring buoys available (harbour authority) — fee varies; inquire on VHF Ch 12
• Restrictions: DEKPA and TEPAI required. Harbour master allocates berths — call VHF Ch 12 on approach. Ferries and hydrofoils have absolute priority. No motor vehicles on the island — all goods, fuel, and water by donkey or hand. Water available from the quay (metered). Anchor must be set properly — rock patches make re-anchoring sometimes necessary.

For a full overview of Greek anchoring rules, see our overnight anchoring rules by region guide.

Facilities

• Fresh water: Available
• Fuel: Not available — nearest: Hydra Town waterfront (0nm)
• Restaurant: Excellent restaurants lining the harbour front and in the backstreets — seafood, Greek cuisine, and international options. Hydra Town is a gastronome's destination. Fuel by jerry can only (fuel barge does not operate at Hydra — fuel at Poros or Spetses).
• Provisions: Available

Skipper's Tips

1. Hydra is a must-visit on the Saronic circuit — but the smart approach is to anchor at Mandraki Bay (1nm W) and dinghy into town: you get the best of the island with a secure, free anchorage
2. Call the harbour master on VHF Ch 12 at least 30 minutes before arrival for a berth allocation — walk-in arrivals get the worst spots
3. The town quay is a social experience: the waterfront is buzzing from 09:00–23:00 with cafes, galleries, and a constant stream of famous visitors (Hydra attracts artists, film directors, and international visitors year-round)
4. Water is metered on the quay and expensive — take on water at Poros or Spetses if possible
5. If overnighting, position fenders carefully and use spring lines — ferry wash can be violent and arrives without warning