Île Sainte-Marie weather by month & the best time to visit
Madagascar · beach resort · tropical monsoon climate
The best time to visit Île Sainte-Marie is September — its sunniest month (Sunshine Score 86/100), with October and August close behind. Île Sainte-Marie averages about 2,398 hours of sunshine a year. Daytime highs around 24°C / 75°F and roughly 39 mm of rain in September.
When is the best time to visit Île Sainte-Marie?
For sunshine, the best time to visit Île Sainte-Marie is September, then October and August. The dullest month is January (65/100, 261 mm of rain). The full month-by-month picture is in the table below.
How sunny is Île Sainte-Marie?
Île Sainte-Marie gets a moderate 2,398 hours of sunshine a year. September (86/100) is noticeably better than January (65). It ranks #15 of 16 destinations in Madagascar for annual sunshine, below the national median of 3,157 hours. Rain has a clear season: the wettest stretch, around February, carries about 49% of the annual 1,582 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 65 | 28° / 82°F | 27° / 81°F | 261 mm | 11 | 29° / 84°F |
| February | 65 | 28° / 82°F | 27° / 81°F | 216 mm | 11 | 28° / 82°F |
| March | 65 | 28° / 82°F | 27° / 81°F | 291 mm | 10 | 29° / 84°F |
| April | 65 | 27° / 81°F | 26° / 79°F | 160 mm | 9 | 28° / 82°F |
| May | 71 | 27° / 81°F | 25° / 77°F | 121 mm | 7 | 27° / 81°F |
| June | 77 | 25° / 77°F | 24° / 75°F | 86 mm | 6 | 25° / 77°F |
| July | 77 | 24° / 75°F | 23° / 73°F | 88 mm | 6 | 25° / 77°F |
| August | 83 | 24° / 75°F | 23° / 73°F | 52 mm | 7 | 25° / 77°F |
| September | 86 | 24° / 75°F | 23° / 73°F | 39 mm | 9 | 25° / 77°F |
| October | 84 | 25° / 77°F | 24° / 75°F | 49 mm | 10 | 26° / 79°F |
| November | 80 | 27° / 81°F | 25° / 77°F | 70 mm | 11 | 27° / 81°F |
| December | 66 | 28° / 82°F | 26° / 79°F | 149 mm | 12 | 28° / 82°F |
Sea temperature in Île Sainte-Marie by month
The sea off Île Sainte-Marie is warmest in January at around 29°C / 84°F, and coolest in June at 25°C / 77°F. The water sits at a comfortable 21°C or warmer roughly all year round. Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
Île Sainte-Marie: questions and answers
What kind of destination is Île Sainte-Marie?
Île Sainte-Marie is a beach resort in Madagascar with a tropical monsoon climate — the sea reaches 29°C at its warmest and is swimmable (21°C+) year-round.
How many hours of sunshine does Île Sainte-Marie get a year?
Île Sainte-Marie gets about 2,398 hours of sunshine a year, at its best around September.
When is the best time to visit Île Sainte-Marie?
The sunniest time to visit Île Sainte-Marie is September, when the Sunshine Score peaks at 86/100 (with October and August close behind). Expect daytime highs around 24°C / 75°F.
What is the least sunny month in Île Sainte-Marie?
January is the least sunny month in Île Sainte-Marie, scoring 65/100 with about 261 mm of rain.
What is the sea temperature in Île Sainte-Marie?
The sea in Île Sainte-Marie ranges from about 25°C (June) to 29°C (January). Month-by-month sea temperatures are on this page.
How strong is the sun in Île Sainte-Marie?
The typical midday UV index in Île Sainte-Marie peaks around 12 (extreme) in December, easing to about 6 (high) in June. Month-by-month midday UV values are in the UV column of the table on this page.
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