Angra dos Reis 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 20:00 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 America/Sao Paulo local. Folk tradition, not a scientific forecast.

Last spring tide on Sun 03 May (range 0.9m). Next neap on Fri 08 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.

The Baía de Ilha Grande occupies a 150-kilometre section of the Rio de Janeiro State coastline between Angra dos Reis and Parati, sheltered from open Atlantic swell by the Sierra do Mar escarpment and the archipelago of islands — by common count, approximately 365 — distributed across the bay. The tidal regime is semidiurnal with a mean spring range of approximately 1.0 metre. Inside the bay's protected waters, the tidal signal is the main water-level variable rather than swell or wave action, which makes the bay a significant small-boat cruising ground. Angra dos Reis is the main access point to the bay from the Rio side. The town itself has a compact waterfront with ferry terminals, charter boat operators, and the infrastructure for accessing the islands. Ilha Grande, the largest island, sits 15 kilometres offshore and is reached by passenger ferry in approximately 90 minutes from Angra or by faster launches from Conceição de Jacareí. Ilha Grande's history is defined by what was located there: a 19th-century leper colony and then, from 1903 through 1994, the Cândido Mendes prison complex, which deterred development and inadvertently preserved the island's ecology. The island today is classified as a state park and UNESCO-listed Atlantic Forest biosphere reserve; no vehicles exist on the island and the main settlement at Vila do Abraão is entirely pedestrian. Lopes Mendes beach, on the Atlantic-facing east side of Ilha Grande, requires a 90-minute walk from Vila do Abraão through Atlantic Forest or arrival by boat. It is four kilometres of white sand with clear water and consistent southeast swell. The Atlantic Forest interior of Ilha Grande holds howler monkeys, toucans, and several Atlantic Forest endemic bird species. The bay's water clarity is higher than typical for the Rio de Janeiro coastline because the lack of major rivers draining directly into the enclosed bay reduces turbidity, and the Atlantic Forest cover on surrounding mountains limits agricultural runoff. Coral outcrops and rocky reefs in the bay's northern sections support reef fish visible by snorkelling in 3 to 6 metres. Kayaking the mangrove channels on the back sides of the islands on a flooding tide is one of the more distinctive available experiences — the channels constrict as they move inland, and the tidal flow creates sufficient current in the narrower sections to require modest paddling effort on the ebb. Angra dos Reis is also home to two of Brazil's three nuclear power units — Angra 1 (operational 1985) and Angra 2 (operational 2001) — on the peninsula south of the town. A third unit, Angra 3, has been under intermittent construction since the 1980s with multiple project suspensions. The plant is visible from the water and from the coast road, an incongruous presence in one of Brazil's most biologically rich coastal areas. Predictions on this page come from Open-Meteo Marine, a gridded global ocean model. Accuracy is typically within plus or minus 45 minutes on timing and 0.2 to 0.3 metres on height — model-derived, not from a local gauge. For authoritative Brazilian tide data, consult the Centro de Hidrografia da Marinha (CHM) at mar.mil.br/chm.