The harbour from the water.

A harbour five kilometres long

Maó harbour runs inland for about five kilometres, one of the largest natural harbours in the Mediterranean. From the water its shape becomes clear: a long inlet with side branches, sheltered from most weather, with the town of Maó at the inner end and the open sea beyond the mouth. Ships have used it for centuries for exactly that shelter. A short boat trip is the simplest way to see why the harbour mattered, and how much of the island's history sits along its shores.

Maó is still a working port. Ferries leave for Palma and Barcelona, naval and commercial vessels come and go, and the waterfront keeps the marks of the 18th century, when the island was under British rule for most of the period. Georgian windows, the barracks town of Es Castell and a taste for gin all come from those decades. Look for the layers as you pass: stone quays, old storehouses and small boats that belong to people who live here all year.

The harbour is the reason Maó exists, and the water is the best place to understand it.

How to get to the water

Menorca Airport (MAH) sits about four to five kilometres south-west of Maó, with buses into the town; check the island bus operator for times, which thin out in winter. From the centre, the port is a steep walk downhill, and the climb back is the part people remember. Allow time for it, or plan to return by bus or taxi. The harbour front is long, so the quay you want may be further along than you expect. Wear shoes you can walk in.

Boats leave from the port area in Maó, and some trips start closer to the mouth, at Es Castell or Cala Sant Esteve. Confirm the departure point when you book, because it changes the walk to the quay rather than the trip itself. The town is compact: the old centre, the market and the port are within walking distance of each other, though the streets between them are steep and stepped. In summer the quays are busy with ferries, so arrive early and ask where your boat is.

When to go out

The harbour is sheltered, so trips run in most conditions, but the north wind known as the tramuntana can make the water beyond the mouth uncomfortable. Mornings are usually calmer and the light is better for looking at the forts on the headlands. Late afternoon brings low sun onto the town side, which photographs well and is cooler than midday. In July and August, an open boat at noon is hot even with a breeze. Thin cloud gives flat light and a cooler ride.

Departures are many in summer and few in winter, when much of the tourism business on Menorca closes roughly from November to April. Some years the boats stop entirely outside the season. If you are here in spring or autumn, ask at the port or the tourist office in Maó before building a day around a trip, and keep a plan on land in reserve: the forts, the old town and the coastal path all work in any weather.

Forts and islets from the water

From the water the harbour reads as a series of layers: the town and its quays at the inner end, the wooded slopes behind, then the islets, and finally the two headlands at the mouth. Forts sit above the entrance on both sides. Boats pass close enough to see the stonework of the walls and the shapes of the buildings without landing, which suits a short trip and keeps the day simple. Look up as well as across: the forts are easier to read from below.

Illa del Rei, in the middle of the harbour, holds a former naval hospital from the British period, now restored and used for cultural events. Near the mouth, the Lazaretto island was used in the past to hold arrivals in quarantine, a reminder that the harbour was once a gate to the island in the most literal sense. Both are seen best from the water, and neither needs a landing to make sense. The trip is as much about the shape of the harbour as about any single building.

• Illa del ReiA small island in the middle of the harbour with a former naval hospital from the British period.
• La MolaThe fortress on the southern headland above the harbour mouth, reached by road from Maó.
• Es CastellThe small town close to the harbour mouth, laid out in the years of British rule.
• Fort MarlboroughA low stone fort beside Cala Sant Esteve, built in the 18th century to guard the entrance.
• Harbour mouthThe narrow entrance where the sheltered water meets the open sea, with headlands on both sides.

Boats, kayaks and a working port

Trips range from short loops inside the harbour to longer runs toward the mouth and back. Some are in small open boats with a handful of passengers; others use larger vessels with a covered deck and room to move about. None of it is complicated: you turn up at the quay, listen to the briefing, sit down, and the harbour does the rest. In July and August, book ahead if you want a particular time of day. Ask how long the boat is out before you commit.

The harbour is a working port, so keep clear of the ferry berths and the commercial quays, and do as the crew say. Kayaks can be hired in the harbour area in season, which gives a slower and quieter version of the same view, though the distance to the mouth is real and the wind can turn against you on the way back. Check conditions before setting out in a kayak, and stay inside the harbour. A kayak is not the craft for the open water beyond the headlands.

• Short tripsLoops inside the harbour, with the town, the quays and the islets in view.
• Longer runsOut toward the mouth, past the forts, with the open sea beyond the headlands.
• KayakHire in season from the harbour area, for a slower look at the same water.
• BookingTurn up at the quay, or book ahead for a set time in high summer.

Keep the harbour clean

Posidonia oceanica, the seagrass that gives Balearic water its clarity, grows from the shallows to about 30 to 40 metres deep. Anchoring over the meadows is regulated by a Balearic decree, and mooring buoys are installed in some bays in summer. Inside a harbour the rules are tighter still. A trip with a crew removes the question of where to drop an anchor, which is one quiet reason to go with a boat rather than your own.

On board, take everything back to land: wrappers, bottles, sun cream packaging, the lot. Do not feed the fish, and do not swim from the boat in the fairway where ferries and other traffic pass. Keep voices low near the islets, where birds nest on the rocks and the noise carries over water. The harbour is a place people live and work in all year, not only a view for the summer.

What to bring on board

Even in summer the wind on the water is cooler than the town, and a boat without shade gets hot. Bring sun cover that stays on in the breeze, a hat with a strap, and more water than you think you need. Soft shoes with grip are better than sandals on a wet deck. Binoculars help if you want to look properly at the forts, the islets and the birds on the rocks. A thin jumper earns its place on an evening trip, even in August.

A light waterproof layer earns its place in spring and autumn, when showers cross quickly and the harbour turns grey. Bring a small bag that closes, so nothing blows overboard, and something soft to sit on if the boat has hard benches. Cameras and phones work better with a strap around the wrist. Sunglasses with a cord are worth the trouble. Leave the rest in your room: a short harbour trip needs very little kit.

• Sun coverA hat with a strap and a shirt that stays on in the breeze.
• WaterMore than you would carry on land for the same time.
• Light layerA thin waterproof for spring and autumn, when showers pass quickly.
• BinocularsUseful for the forts, the islets and the birds on the rocks.
• Soft shoesGrip matters more than style on a wet deck.

Nearby after the water

Back on land, Maó old town is a short but steep climb from the port, with the market and the churches at the top and a maze of streets in between. Es Castell and Cala Sant Esteve are a short bus or taxi ride away, with the fort above the little cala. The fortress at La Mola, on the far headland, is a half day in itself, and the road out there passes close to the harbour mouth.

Inland, Sant Lluís is a small grid of streets laid out in the 18th century, with a church at its centre and a square that fills in the evening. Binibeca Vell, the white village on the coast, is close by and takes an hour to walk round. All of it fits into a day that starts on the water, moves to a fort and ends on foot in a town square. Buses between these places are few out of season, so check times or plan to walk.