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Angra dos Reis sits on the Costa Verde, the Atlantic coast between Rio de Janeiro and Paraty, and has a hot, humid tropical climate with no real winter. Daytime highs run 25 to 31°C (77 to 88°F) all year, and the town receives about 1,997 mm of rain annually, most of it in the December to March summer. The driest, clearest months are June through August, which is why Brazilian winter is the peak season for boat trips around the bay’s 365 islands.
Angra dos Reis Weather by Month: Climate Overview
Angra dos Reis has a tropical rainforest climate (Köppen Af) tempered by the sea. The hottest month is February, when highs average 31°C (88°F), and the coolest is July at 25°C (77°F), with overnight lows of 17 to 18°C (63 to 64°F). Rainfall peaks in January at about 234 mm and drops to 50 mm in July. Sea temperatures stay between 21 and 27°C (70 to 80°F), so swimming is possible year-round. For help choosing when to go, see our best time to visit Angra dos Reis guide.
Angra dos Reis Weather by Month: Monthly Data
| Month | Avg High | Avg Low | Rainfall | Sea Temp |
|---|---|---|---|---|
| January | 30°C (86°F) | 24°C (75°F) | 234 mm | 26°C (79°F) |
| February | 31°C (88°F) | 24°C (75°F) | 186 mm | 27°C (81°F) |
| March | 30°C (86°F) | 24°C (75°F) | 181 mm | 27°C (81°F) |
| April | 28°C (82°F) | 22°C (72°F) | 137 mm | 26°C (79°F) |
| May | 26°C (79°F) | 20°C (68°F) | 81 mm | 24°C (75°F) |
| June | 25°C (77°F) | 18°C (64°F) | 54 mm | 23°C (73°F) |
| July | 25°C (77°F) | 17°C (63°F) | 50 mm | 21°C (70°F) |
| August | 25°C (77°F) | 18°C (64°F) | 55 mm | 21°C (70°F) |
| September | 25°C (77°F) | 19°C (66°F) | 85 mm | 22°C (72°F) |
| October | 26°C (79°F) | 20°C (68°F) | 114 mm | 23°C (73°F) |
| November | 27°C (81°F) | 22°C (72°F) | 150 mm | 24°C (75°F) |
| December | 29°C (84°F) | 23°C (73°F) | 228 mm | 25°C (77°F) |
These are long-term monthly averages. The numbers bounce around from year to year, but the pattern is steady: a wet, hot summer from December to March and a dry, milder winter from June to August. Humidity runs about 80% year-round, highest in the summer months.
Angra dos Reis Weather by Month: Summer (December to March)
December through March is the hottest and wettest stretch, with highs of 29 to 31°C (84 to 88°F) and 150 to 234 mm of rain a month. Rain usually falls as heavy late-afternoon downpours that clear within an hour or two, so mornings stay usable for the beach. This is the busiest season for boat tours and island hopping, and it is also when the bay fills with New Year’s Eve boats for Reveillon on December 31.
Angra dos Reis Weather by Month: Autumn (April to May)
April and May cool slightly, with highs of 26 to 28°C (79 to 82°F) and rain easing to 81 to 137 mm. April still sees some afternoon storms, but May is reliably drier and a good shoulder month. The sea is still warm at 24 to 26°C (75 to 79°F), and the Festa do Divino EspÃrito Santo and the Angra Jazz festival both fall in this window.
Angra dos Reis Weather by Month: Winter (June to August)
June through August is the dry season and the best weather of the year. Highs sit at 25°C (77°F), lows drop to 17 to 18°C (63 to 64°F), and rain falls to just 50 to 55 mm a month. Skies are at their clearest, which matters for the views on the Ilha Grande and Frade peninsula. Nights can feel cool on the water, so bring a light jacket for evening boat rides. This is the peak season for hiking Lopes Mendes and for hotel availability, so book ahead.
Angra dos Reis Weather by Month: Spring (September to November)
September to November warms back up, with highs climbing from 25 to 27°C (77 to 81°F) and rain rising from 85 to 150 mm. October and November bring the first proper summer storms but are still far drier than January. Sea temperatures recover to 23 to 24°C (73 to 75°F), and the travel tips and FAQ guide covers the late-year ferry schedules if you are aiming for a spring trip.
Angra dos Reis Weather by Month: Sunshine and Humidity
Angra dos Reis averages around 2,000 hours of sunshine a year, with the sunniest skies from June through September and the cloudiest stretch in December and January. Relative humidity hovers near 80% throughout the year, and it is highest just before the summer downpours. If you want the warmest water rather than the driest skies, February delivers both, at the cost of the biggest rain totals of the year.
