Alibaug, Maharashtra tide times

Alibaug sits on the Konkan coast 50 km south of Mumbai, close enough to see the city's glow at night but far enough to feel like a different world. The Arabian Sea arrives here in a semidiurnal pattern — two high tides and two low tides each day, with a mean range between 2.5 m and 3.5 m on spring tides. That range makes the tidal state matter for almost everything you might want to do on this stretch of coast.

The centrepiece is Kulaba Fort, known locally as Kolaba Fort, sitting on a reef about 300 m offshore from Alibaug beach. At high water, the fort is an island — saltwater surrounds its walls and the reef is invisible beneath the surface. Drop 2.5 m off the tide and the reef emerges. The sand and rock flat between the beach and the fort dries out over a period of roughly two to three hours centred on the lowest point of the tidal cycle. During that window, you can walk out to the fort across wet rock and sand — no boat required. The walk takes around ten minutes in each direction. Plan to arrive when the water is already receding and you will have the full window. Time it wrong and you are either waiting on the beach or wading back.

To know your window, check the predicted low-tide time on the day you plan to visit. Spring lows — the lowest tides of the fortnightly cycle, occurring around new moon and full moon — expose the most reef and give the most comfortable crossing. Neap tides, which occur around the quarter moons, may not expose the reef fully enough for a safe dry crossing. The height at Alibaug during a spring low typically falls between 0.2 m and 0.5 m above chart datum; anything below 0.4 m is reliable walking ground.

Kulaba Fort was built in the late 17th century under the Maratha navy and has survived centuries of coastal exposure in reasonable shape. The walls enclose a temple, a cistern, and the remnants of residential quarters. At low tide the fort attracts families, photographers, and history walkers. On busy weekends in winter — November through February — the reef fills with people crossing in the same two-hour window. Come on a weekday or during the shoulder season (September or late February) for more space.

Alibaug beach itself runs north–south along the town's waterfront. The sand is grey-brown volcanic, backed by casuarina trees and a line of food stalls. At high water, waves reach the upper beach and swimming is reasonable if the sea is calm — the monsoon (June through August) makes the water rough and swimming inadvisable. At low tide, the beach widens considerably and flat tidal pools form between exposed rocks at the southern end near Varsoli.

The Koli fishing community has worked this coast for generations. Their wooden outrigger boats — painted bright colours, diesel-engined — launch directly off the beach and return according to tidal state and the time of day. An incoming tide after a night at sea means the boats come in with a push from the flood current. Watching the landing at Alibaug beach around dawn, as boats are hauled up the sand on rollers, is worth the early start. The morning fish market adjacent to the beach operates until around 9:00; arrive before 8:30 for anything worth buying.

For anglers, the rocky southern end of Alibaug beach and the reefs around Khanderi Island — visible offshore — hold snapper, pomfret, and travelly. Shore fishing with bait is most productive through the last two hours of the flood tide when fish follow baitfish onto the shallowing reef. Khanderi Island itself is a protected wildlife area (nesting seabirds and Indian rock pythons) and requires permission to land, but the surrounding water is open for fishing from a boat.

Getting here: the fastest route is the Ro-Ro ferry from the Gateway of India in Mumbai to the Mandwa jetty, which takes around one hour. A shared or private taxi from Mandwa to Alibaug town takes another 15 minutes. The ferry runs several times daily but fills up quickly on holiday weekends — pre-book the ticket online. The road route from Mumbai via the Vashi bridge takes three hours under light traffic; plan for longer on Fridays and holiday eves. If you are coming specifically for the Kulaba Fort crossing, check the tide prediction before booking your travel — a spring low tide on a Saturday with a clear-sky forecast is the ideal combination.

Tide data for Alibaug, Maharashtra comes from the Open-Meteo Marine API, a gridded model product. Timing accuracy is ±45 minutes, height accuracy ±0.3 m — usable for trip planning, not for navigation.