Kolaba Fort, Alibaug: the sea fort you walk to at low tide

Kolaba Fort Alibaug is a Maratha sea fort that stands in the shallow Arabian Sea just off Alibaug beach in Raigad district, Maharashtra. For most of the day it is ringed by water, but at low tide the sea pulls back far enough to expose a flat stretch of sand, and you can simply walk out to the gate. Built up as a naval base in the time of Chhatrapati Shivaji Maharaj and later the stronghold of the admiral Kanhoji Angre, it is the fort that gives the beach town of Alibaug half its character.

Kolaba Fort, also spelt Kulaba or Colaba, is a Maratha-era sea fort in the Arabian Sea about 1–2 km off Alibaug, in Raigad district, Maharashtra. You reach it on foot across the sand at low tide and by boat at high tide. Shivaji chose the site and Sambhaji completed it around 1680–81; it later became admiral Kanhoji Angre’s naval base.

About Kolaba Fort

Kolaba Fort is a stone sea fort standing in the Arabian Sea off the town of Alibaug, in Raigad district, Maharashtra, in the Konkan region. According to Wikipedia’s article on the fort, it sits in the sea at a distance of roughly 1–2 km from the Alibaug shore, about 35 km south of Mumbai, and is a protected monument. Locally it is also called Kulaba or Colaba Fort, and because it is Alibaug’s signature sight it is often simply called Alibaug Fort.

What makes it unusual is the setting. This is a jaldurg (sea fort) built on a low rocky outcrop just off the beach, so for part of each day it is an island and for part of the day it is joined to the mainland by exposed sand. The walls, built of stone, average about 25 feet high according to Wikipedia, with two main gateways — one facing the sea and one facing Alibaug town. From the ramparts you look back at the beach, the fishing boats and the line of the Konkan coast.

The fort rewards a little context. It is best understood as part of the Maratha navy’s chain of coastal forts, the same seafaring story that runs through our Maharashtra travel guide, and it pairs naturally with a wider stay in the beach town covered in our Alibaug guide. Come for the walk across the sand; stay for the wells, temples and old cannon inside.

The tidal walk: low-tide access

You reach Kolaba Fort on foot across the exposed sand at low tide, and by boat when the tide is in. This tidal rhythm is the single most important thing to plan around, and it is why every visitor account stresses checking the day’s tide before setting out. As Wikipedia notes, at low tide you can walk to the fort, while at high tide boats are required; during the monsoon, even the low-tide approach can mean wading through water that reaches waist-deep.

The walkable window shifts every day, because low and high tide move through the day across the lunar cycle. Rather than trust a fixed figure, check a tide forecast for Alibaug the night before and again on the morning of your visit. India’s official tide predictions come from the Indian National Centre for Ocean Information Services (INCOIS) and the Survey of India tide tables; many visitors also simply ask the boatmen and local hotels, who track the day’s timings closely. Plan to walk out well before the lowest point of the tide and, crucially, to be back on the beach before the water returns.

When the tide is high, local boatmen ferry visitors from the beach to the fort and back; the crossing is short. Horse-drawn carts have also traditionally carried visitors across the shallows. Fares are small but are set locally and are not official — agree the amount and the return arrangement before you get in, and treat any price you read online as an indicative planning estimate to reconfirm on the day.

Kolaba Fort Alibaug: history and the Angres

Kolaba Fort was developed into a Maratha naval base in the late 17th century, with Chhatrapati Shivaji Maharaj choosing the site and his successors completing and strengthening it. The exact dates vary between sources. Wikipedia records that Shivaji strengthened and fortified Kolaba in 1662, but also gives a construction start of 19 March 1680, with the fort completed by Sambhaji Raje in June 1681 after Shivaji’s death in 1680. These dates conflict, and the sources do not fully resolve them; what is consistent is that the fort took shape as part of Shivaji’s drive to build Maratha sea power along the Konkan.

Command of the new fort was placed with naval officers such as Darya Sarang and Mainak Bhandari, under whom, per Wikipedia, Kolaba became a centre of Maratha attacks on British shipping. Its most famous association, though, is with Kanhoji Angre. Under a 1713 treaty with Peshwa Balaji Vishwanath, Kolaba and several other forts were handed to Sarkhel (admiral) Kanhoji Angre, who used it as his principal base for raids against European — chiefly British — vessels along the coast.

The Angre era left its mark. On 17 November 1721, a joint British and Portuguese expedition against Kolaba failed; Wikipedia records that the British afterwards blamed “the cowardice of the Portuguese.” Kanhoji Angre died at the fort on 4 July 1729. Fires damaged buildings near the Pinjara Bastion in 1729 and the Angre Wada (mansion) in 1787. By 1842, according to Wikipedia, the British auctioned the fort’s wooden structures and reused its stone for the Alibag water works. Where popular retellings drift into legend — tales of treasure or of an unbeaten fort — treat them as local lore rather than documented history.

Inside the fort: wells, temples and gateways

Inside the walls, Kolaba Fort holds freshwater wells, temples, carved gateways and old cannon — and the wells are the detail visitors remember. Although the fort sits in the sea, it has wells of sweet water inside, a practical necessity for a garrison that could be cut off by the tide and a point every account highlights. Finding fresh water a short walk from salt water is the fort’s quiet marvel.

The main shrine is the Siddhivinayak temple, a Ganesh temple that, according to Wikipedia, was built by Raghoji Angre in 1759; it is still worshipped at, including by local fishing families. Visitor accounts also mention a Padmavati or Mahishasuramardini (a form of the goddess Durga) shrine within the fort, alongside a dargah of Haji Kamaluddin Shah — a reminder that the fort’s community was mixed. The two main gateways and the bastions carry stone carving typical of Maratha coastal forts; look for relief figures of animals near the entrances.

Near the northern wall lie two old English cannon. Wikipedia records their inscription as “Dawson Hardy Field, Low Moor Ironworks, Yorkshire, England” — a tangible trace of the European arms trade that the Angres’ fleet was built to resist. The interior today is partly ruined and, in places, overgrown, so wear sturdy footwear and watch your step on the uneven stone.

Best time to visit Kolaba Fort

The best time to visit Kolaba Fort is October to March, the dry Konkan winter, when the sea is calmer, the heat is bearable and the Mumbai ferries run normally. These months give the most comfortable conditions for the walk across the sand and for exploring the open, shade-poor interior. Within that window, aim your visit to coincide with a daytime low tide rather than a fixed date.

March to May turns hot and humid along this coast, so plan the walk for early morning. The south-west monsoon, roughly June to September, brings heavy rain and rough seas to the Konkan; the catamaran ferries from Mumbai are typically suspended in these months, and even the low-tide approach to the fort can mean wading through water. Check the India Meteorological Department (IMD) forecast and the tide before any monsoon-season plan.

How to reach Kolaba Fort

You reach Kolaba Fort by first getting to Alibaug town and its beach, then crossing to the fort on foot at low tide or by boat at high tide. Alibaug is well connected to Mumbai by both sea and road, and the fort itself is right off the main beach, so the final leg is short.

By sea (from Mumbai): The scenic route is the ferry from the Gateway of India in South Mumbai to Mandwa jetty, near Alibaug. Catamaran operators such as PNP, Ajanta, Maldar and M2M run this crossing in roughly 40–55 minutes depending on the boat. M2M Ferries runs a RoPax (roll-on/roll-off) service that carries vehicles and operates in most weather, while the regular passenger catamarans are typically suspended during the monsoon. From Mandwa, shuttle buses and auto-rickshaws cover the roughly 20 km to Alibaug beach in about 45 minutes.

By road: Alibaug is about a 2–2.5 hour drive from Mumbai, now considerably shorter since the Atal Setu (Mumbai Trans Harbour Link) opened across the bay. State transport and private buses also run to Alibaug from Mumbai and Pune.

By rail: There is no railway station at Alibaug. The nearest railhead is Pen, about 28–30 km away according to Wikivoyage and Trawell; from Pen you take a bus or taxi to Alibaug. Pen is connected onward to Panvel and the Mumbai suburban network. Many travellers coming from Pune or further afield also rail to Panvel and continue by road.

Entry, timings and tide safety

Kolaba Fort is an open monument reached from Alibaug beach, best visited in daylight hours around a low tide. There is no fixed ticket counter in the way a ticketed ASI monument has; some visitor accounts mention a small local entry charge and a boat fare at high tide, but these are set locally and change, so treat any figure online as an indicative planning estimate to reconfirm on the spot. Do not pay more than the going local rate, and confirm the return boat before you cross.

Timings here are really tide timings, not opening hours. The sea decides when you can walk out and, more importantly, when you must be back. The safe routine is simple: walk out as the tide is going out or is already low, keep an eye on the water, and return well before it comes back in. People have been caught on the fort by a returning tide; it is not worth cutting the window fine. If you cannot verify the day’s tide, ask local boatmen before setting foot on the sand.

A suggested day plan

Kolaba Fort works well as a half-day outing built around a morning low tide, combined with the rest of Alibaug.

• Early morning: Reach Alibaug beach timed to a daytime low tide. Walk out across the sand to the fort while the water is well out.
• At the fort: Explore the gateways, the Siddhivinayak temple, the freshwater wells, the goddess shrine and the old cannon on the north wall. Climb to the ramparts for the view back to the beach. Allow about 60–90 minutes.
• Return: Head back to the beach before the tide turns. If the tide is coming in, take a boat rather than risk the walk.
• Afternoon: Rest over a Konkan seafood lunch in Alibaug town, then visit a nearby beach such as Alibaug, Kihim or Kashid.
• Evening: Watch sunset from the beach, or drive to Mandwa for the ferry back to Mumbai.

Where to stay in Alibaug

You stay in Alibaug town or the surrounding coast rather than at the fort itself, and the area has a wide range from budget rooms to the villas Alibaug is now known for. The town centre, a short drive from the beach, is the most convenient base for an early low-tide walk.

• Budget: Simple guesthouses and lodges in and around Alibaug town, typically in the ₹1,500–3,000 range per night (indicative planning estimate, reconfirm).
• Mid-range: Beach resorts and homestays around Alibaug, Varsoli and Kihim, roughly ₹3,500–7,000 (indicative, reconfirm).
• Luxury: Private villas and upscale resorts, especially towards Mandwa and Nagaon, from about ₹10,000 upwards (indicative, reconfirm).

Weekends and holidays are busy and prices rise, so book ahead. MTDC (Maharashtra Tourism Development Corporation) resorts in the wider region can be checked on the official Maharashtra Tourism site. All tariff bands above are indicative planning estimates as of October 2026, not quoted rates.

Food to try

Alibaug’s food is Konkan coastal cooking, heavy on fresh seafood and coconut. Eat in the town or at a beach shack after your fort walk.

• Surmai fry: kingfish (surmai) marinated in spices and shallow-fried — the classic Konkan seafood plate.
• Pomfret and prawn curry: fish or prawns in a coconut-based Malvani-style gravy, eaten with rice.
• Kombdi vade: Malvani chicken curry with vade (soft fried puris of spiced flour).
• Sol kadhi: a pink, cooling drink of kokum (a tangy coastal fruit) and coconut milk, served after a seafood meal.
• Modak: steamed rice-flour dumplings filled with jaggery and coconut, offered to Ganesh and sold around the temples.

Vegetarians are well served with usal (sprout curry), bhakri (millet flatbread) and coconut-based vegetable dishes. Prices at shacks and small eateries are modest; confirm on the day.

Budget breakdown

A day trip to Kolaba Fort from Mumbai is inexpensive, with the ferry and food the main costs and the fort visit itself cheap. The table below is a planning estimate for one person on a one-day trip, not a quoted set of fares.

Assumptions: public ferry and shared transport, a self-guided fort visit timed to a daytime low tide, and a simple lunch. An overnight stay in Alibaug adds the room tariff from the stay section. All figures are indicative planning estimates to reconfirm before you travel.

Rules and safety

The one rule that matters at Kolaba Fort is the tide: go out at low tide and return before the sea comes back. Everything else follows from that.

• Check the day’s tide times (INCOIS/Survey of India tide tables, or reliable local sources) before you walk, and ask the boatmen if unsure.
• Walk out as the tide is low or falling; be back on the beach well before it turns. Do not get stranded on the fort.
• Wear sturdy, grippy footwear — the sand can be soft and the fort’s stone is uneven and partly overgrown.
• At high tide, take a boat rather than attempt to wade; agree the fare and the return in advance.
• Respect the temples and the dargah inside; it is a place of active worship.
• Carry your litter back; there is little infrastructure on the fort. Carry water and sun protection — there is almost no shade.

No special permit is needed to visit the fort. There are no verified drone rules specific to the fort; if you plan aerial photography, check current DGCA regulations and any local restrictions first.

Practical tips

A few practical notes make the Kolaba Fort visit smoother.

• Timing: plan the whole day around a daytime low tide; a morning low tide is ideal in summer for cooler walking.
• Connectivity and cash: Alibaug town has mobile network, ATMs and widespread UPI; carry some cash for boatmen and small eateries, who may not take cards.
• Medical: the nearest hospitals are in Alibaug town; there are no facilities on the fort itself.
• Footwear and clothing: sandals or shoes you can walk in on wet sand; a sun hat and water in summer; a light raincoat and extra caution in the monsoon.
• Solo and family travellers: the beach and the walk are generally busy and safe in daylight; keep children close near the water and watch the tide at all times.
• Photography: the best light is early morning; the ramparts give the clearest view back to Alibaug beach.

Nearby places

Kolaba Fort sits at the centre of a cluster of Konkan beaches and forts, so it combines easily with the rest of the Alibaug coast and a longer Maharashtra itinerary — including the hill retreat of Matheran inland.

Frequently asked questions

Where is Kolaba Fort located?

Kolaba Fort is in the Arabian Sea just off Alibaug, in Raigad district, Maharashtra, in the Konkan region. According to Wikipedia it stands about 1–2 km from the Alibaug shore and roughly 35 km south of Mumbai. It is also spelt Kulaba or Colaba Fort and is often called Alibaug Fort after the town beside it.

How do you reach Kolaba Fort from Alibaug beach?

From Alibaug beach you reach Kolaba Fort on foot across the exposed sand at low tide, when the sea pulls back far enough to walk the roughly 1–2 km out to the gate. At high tide the sand is covered, so local boatmen ferry visitors across instead. Check the day’s tide before you set out and confirm any boat fare in advance.

When is low tide at Kolaba Fort, and can you always walk?

Low tide at Kolaba Fort changes every day with the lunar cycle, so there is no fixed time; you cannot always walk. Check a tide forecast for Alibaug (INCOIS or Survey of India tide tables, or local boatmen) the night before and on the morning of your visit. Walk out at or before low tide and return before the water comes back in.

Who built Kolaba Fort?

Chhatrapati Shivaji Maharaj chose the site and developed Kolaba as a Maratha naval base; per Wikipedia it was strengthened around 1662 and completed by his son Sambhaji Raje in June 1681, after Shivaji’s death in 1680. From 1713 it became the base of the admiral Kanhoji Angre. Exact dates vary between sources, so these are given as recorded, not settled.

What is the best time to visit Kolaba Fort?

The best time to visit Kolaba Fort is October to March, the dry Konkan winter, when the sea is calmer, the heat is bearable and the Mumbai ferries run normally. Time your visit to a daytime low tide within those months. Avoid the south-west monsoon (June–September), when seas are rough, ferries are usually suspended and wading is likely even at low tide.

Is there an entry fee or permit for Kolaba Fort?

Kolaba Fort is an open monument and needs no special permit. Some visitor accounts mention a small local entry charge and a boat fare at high tide, but these are locally set and change, so treat any figure online as an indicative estimate and reconfirm on the day. Agree the boat fare and your return before crossing.

Last updated and sources

Kolaba Fort suits anyone who likes history with a walk attached — families, history-minded travellers and weekenders from Mumbai. Come in the October–March window, time it to a daytime low tide, and you get a Maratha sea fort you can stroll out to across the sand.

Last updated: 16 October 2026. Fees, timings and permits change — reconfirm with official sources before you travel.

Sources: Wikipedia, Kolaba Fort; Wikivoyage, Alibag (nearest railhead Pen); Trawell, how to reach Alibaug; Lohono, Mumbai–Alibaug ferry and road; Baird Maritime, Mumbai–Mandwa ferry service; Maharashtra Tourism (MTDC); tide predictions via the Indian National Centre for Ocean Information Services (INCOIS) and Survey of India tide tables. Accessed October 2026.