Sagar Island, West Bengal tide times

Predictions: Open-Meteo Marine (MeteoFrance SMOC, 0.08° grid) — heights relative to MSL (not chart datum / LAT). Model-derived.

Model-derived from a global ocean grid. Useful indication; expect about ±45 minutes on average vs. a local harmonic gauge, individual stations vary widely. See /methodology for per-region detail. Not for navigation.

Conditions as of 03:30 local time. Refreshes daily.

Predictions: Open-Meteo Marine (MeteoFrance SMOC, 0.08° grid) — heights relative to MSL (not chart datum / LAT). Model-derived. · Not for navigation.

The angler tradition for major/minor fishing windows: major ≈3-hour windows around moon transit and opposition; minor ≈2-hour windows around moonrise and moonset. Times are Asia/Kolkata local. Folk tradition, not a scientific forecast.

Next spring tide on Wed 06 May (range 2.9m). Next neap on Sat 09 May.

Spring tides cluster around new and full moons (biggest swings). Neap tides land on quarter moons (smallest swings). See the spring tide and neap tide glossary entries for the why.

Sagar Island stands at the point where the Hooghly river — the westernmost major distributary of the Ganges — finally meets the Bay of Bengal. This confluence, known as Gangasagar, is one of Hinduism's most significant sacred sites: the place where the Ganges, born in the Himalayas and carrying the weight of half a subcontinent's geography, completes its journey. The tidal forces at this river mouth are among the strongest on India's east coast, and they affect everything from the position of the bathing ghats used by pilgrims to the ferry schedule for the island's 200,000 permanent residents. The tide at Sagar Island is semidiurnal — two high waters and two low waters per day — with a mean range of 4.0 to 5.5 m. This is among the highest ranges on India's entire coastline, produced by the combination of two amplifying factors: the funnel geometry of the northern Bay of Bengal, which concentrates tidal energy as it shallows toward the river mouths, and the Hooghly estuary itself, which constricts and accelerates tidal flow as it narrows northward toward Kolkata and Diamond Harbour. At spring tides, the difference between low water and high water at the southern tip of the island can exceed 5 m — a change visible to the eye as a substantial rise in the river and creek banks surrounding the island. The Kapil Muni temple at the island's southern tip, the focal point of the Gangasagar pilgrimage, sits at approximately 2.5 m above mean sea level. This elevation places the temple above the daily tidal influence — even at spring high water, the temple complex remains dry under normal conditions. The vulnerability is not the daily tide but cyclonic storm surge. The temple has been rebuilt multiple times following cyclone damage; historical records and local accounts document at least three major rebuilds in the twentieth century following surge events that placed the southern tip of the island under water. The current structure dates from rebuilds after the major cyclones of the 1970s and subsequent events. The combination of large baseline tidal range and potential surge amplification means that a strong cyclone making landfall near Sagar Island could produce a total water level 3–5 m above normal high water — enough to overtop most of the island's land area. The Gangasagar Mela, held at Makar Sankranti in mid-January each year, is one of the largest religious gatherings in the world. Between 1 and 3 million pilgrims make the journey to Sagar Island to bathe at the river-sea confluence during the auspicious period around 14–15 January. The bathing area is not fixed from year to year — the active confluence channel migrates seasonally as the delta responds to monsoon discharge and tidal scour. Each year, authorities survey the channel position and establish the bathing ghats on the firm sand adjacent to the current main channel. High water during the Mela period in January is at the neap end of the tidal cycle in many years — a deliberate planning consideration, since the bathing crowd can access the confluence zone more safely when the tidal range is smaller and the current less vigorous. The ferry connection to Sagar Island is tide-dependent. The main route runs from Kachuberia ghat on the mainland to Kheya Ghat on the island's north shore, with smaller services from Harwood Point (Kakdwip). At spring low water, the ferry ghats on both sides are accessed via temporary bamboo walkways that extend as the bank dries out — the ghat itself may be 40–50 m from the waterline at low water. During the Mela, when crowd pressure on the ghats is extreme, tidal timing significantly affects safety at embarkation and disembarkation points. For photographers, the southern tip of Sagar Island — the confluence zone visible from the Kapil Muni temple steps — offers a view of tidal dynamics that is unusual in its scale and clarity. At high water, the boundary between the Hooghly's brown freshwater and the Bay of Bengal's darker water is visible as a colour line shifting position with the tide; at low water the sandbanks around the confluence are exposed, and the channel between them runs visibly fast. The timing of sunrise against the tidal window — low water in the early morning gives exposed sandbanks catching first light; high water at sunrise gives a flat expanse of water reflecting the sky — determines the photographic character of the shot entirely. Fishing around Sagar Island operates on the strong tidal currents. The mechanised fleet from Diamond Harbour, 60 km north on the Hooghly, runs operations in the near-shore Bay of Bengal; local country boats from Sagar Island's eastern creeks target Hilsa, prawn, and mullet. Hilsa — the prestige fish of the Bengali table — moves up the Hooghly on the flood tide during the post-monsoon season; the most productive fishing positions are on the first flood after the neap low, when Hilsa shoals run shallowest against the current. The island's tidal creek network on its northern and eastern edges is navigable by small boat during the upper half of the tide. At low water, the creek mouths dry to mud. Exploring the inner creek system — lined with mangroves and nipa palm — requires timing departure for 1 hour before high water and returning before the ebb exposes the bars. Tide data for Sagar Island 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.