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When To Go · Destination Guide

Ilha Grande and Angra dos Reis

Rainforest islands, reef dives, and beach-hike days on Brazil's Costa Verde

Updated Jan 23, 2026 • 21 sources

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When to go

Best time to visit Ilha Grande and Angra dos Reis

Costa Verde is diveable yearround, but conditions swing with rainfall and cold fronts.

Best overall window

May to September

Drier weather for hiking and steadier boat days; water often cools to around 20°C to 22°C.

Outside that window

Hotter and wetter with thunderstorms; heavy rain can reduce visibility and cancel boats.

Choose your trip style

Start with the overall answer, then switch only when scuba, freedive, snorkel, or topside timing changes the trip in a meaningful way.

Month-by-month planner

The overall row stays visible so you can compare it against the currently selected scope.

BestGoodTradeoffsMore variable
ScopeJanFebMarAprMayJunJulAugSepOctNovDec
Overall
Wildlife goals and seasonal highlights

These do not replace the overall planner. Use them only if a specific animal or event is driving your trip dates.

  • Humpback whale migration (offshore sightings)

    Best for Scuba, Snorkel, Topside

    Jul to Oct

    JanFebMarAprMayJunJulAugSepOctNovDec

    On some years, boat trips and offshore dives along the Costa Verde corridor may spot humpback whales.

  • Sea turtle encounters

    Best for Scuba, Snorkel, Freedive

    Year-round

    JanFebMarAprMayJunJulAugSepOctNovDec

    Turtles are a yearround possibility around rock reefs and calmer coves.

  • Warm-water juvenile fish season

    Best for Snorkel, Scuba

    Dec to Mar

    JanFebMarAprMayJunJulAugSepOctNovDec

    Warmer months often bring more juvenile reef fish in the shallows.

  • Dry-season thru-hike windows for Volta da Ilha Grande

    Best for Topside

    Jun to Sep

    JanFebMarAprMayJunJulAugSepOctNovDec

    Multiday hikes around the island are more comfortable in the cooler, drier months.

  • Reveillon and peak holiday travel

    Dec to Jan

    JanFebMarAprMayJunJulAugSepOctNovDec

    Late December and January bring the biggest crowds and the highest prices.

  • Carnival side-trip energy in Rio

    Best for Topside

    Feb to Mar

    JanFebMarAprMayJunJulAugSepOctNovDec

    Many travelers combine Costa Verde with Rio during Carnival season.

Always true for this destination
  • Brazilian summer holidays (late Dec and January) bring peak demand and higher prices.
Seasonal cautions
  • Apr, Oct to Nov: Balanced mix of warmth and manageable rain; solid windows for both diving and beaches.
  • Dec to Mar: Hotter and wetter with thunderstorms; heavy rain can reduce visibility and cancel boats.

Built from climate references, access rules, and destination operators. Wildlife timing and route flexibility can shift year to year.