Cayo Largo del Sur weather by month & the best time to visit
Cuba · beach resort · semi-arid climate
The best time to visit Cayo Largo del Sur is January — its sunniest month (Sunshine Score 94/100), with February and March close behind. Cayo Largo del Sur averages about 3,004 hours of sunshine a year. Daytime highs around 26°C / 79°F and roughly 16 mm of rain in January.
When is the best time to visit Cayo Largo del Sur?
For sunshine, the best time to visit Cayo Largo del Sur is January, then February and March. The dullest month is August (78/100, 100 mm of rain). The full month-by-month picture is in the table below.
How sunny is Cayo Largo del Sur?
Cayo Largo del Sur is one of the sunniest places on Earth: about 3,004 hours of sunshine a year. January (94/100) is noticeably better than August (78). Cayo Largo del Sur is the sunniest of the 12 destinations tracked in Cuba. Rain has a clear season: the wettest stretch, around September, carries about 46% of the annual 647 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 94 | 26° / 79°F | 24° / 75°F | 16 mm | 7 | 27° / 81°F |
| February | 94 | 26° / 79°F | 24° / 75°F | 17 mm | 8 | 26° / 79°F |
| March | 94 | 26° / 79°F | 24° / 75°F | 15 mm | 10 | 27° / 81°F |
| April | 92 | 27° / 81°F | 26° / 79°F | 24 mm | 10 | 28° / 82°F |
| May | 84 | 28° / 82°F | 27° / 81°F | 71 mm | 10 | 30° / 86°F |
| June | 82 | 29° / 84°F | 28° / 82°F | 83 mm | 10 | 30° / 86°F |
| July | 83 | 30° / 86°F | 29° / 84°F | 75 mm | 10 | 30° / 86°F |
| August | 78 | 30° / 86°F | 29° / 84°F | 100 mm | 10 | 31° / 88°F |
| September | 78 | 30° / 86°F | 29° / 84°F | 105 mm | 10 | 31° / 88°F |
| October | 80 | 29° / 84°F | 28° / 82°F | 91 mm | 8 | 30° / 86°F |
| November | 92 | 28° / 82°F | 26° / 79°F | 26 mm | 7 | 29° / 84°F |
| December | 92 | 27° / 81°F | 25° / 77°F | 24 mm | 6 | 27° / 81°F |
Sea temperature in Cayo Largo del Sur by month
The sea off Cayo Largo del Sur is warmest in August at around 31°C / 88°F, and coolest in February at 26°C / 79°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
Cayo Largo del Sur: questions and answers
What kind of destination is Cayo Largo del Sur?
Cayo Largo del Sur is a beach resort in Cuba with a semi-arid climate — the sea reaches 31°C at its warmest and is swimmable (21°C+) year-round.
How many hours of sunshine does Cayo Largo del Sur get a year?
Cayo Largo del Sur gets about 3,004 hours of sunshine a year, at its best around January.
When is the best time to visit Cayo Largo del Sur?
The sunniest time to visit Cayo Largo del Sur is January, when the Sunshine Score peaks at 94/100 (with February and March close behind). Expect daytime highs around 26°C / 79°F.
What is the least sunny month in Cayo Largo del Sur?
August is the least sunny month in Cayo Largo del Sur, scoring 78/100 with about 100 mm of rain.
Is Cayo Largo del Sur the sunniest place in Cuba?
Yes — with about 3,004 hours of sunshine a year, Cayo Largo del Sur has the most annual sunshine of the 12 Cuba destinations tracked by Sunshine Atlas.
What is the sea temperature in Cayo Largo del Sur?
The sea in Cayo Largo del Sur ranges from about 26°C (February) to 31°C (August). Month-by-month sea temperatures are on this page.
How strong is the sun in Cayo Largo del Sur?
The typical midday UV index in Cayo Largo del Sur peaks around 10 (very high) in March, easing to about 6 (high) in December. Month-by-month midday UV values are in the UV column of the table on this page.
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