Grand Case weather by month & the best time to visit
🇲🇫 St. Martin · beach resort · semi-arid climate
The best time to visit Grand Case is February — its sunniest month (Sunshine Score 95/100), with March and January close behind. Grand Case averages about 3,131 hours of sunshine a year. Daytime highs around 26°C / 79°F and roughly 12 mm of rain in February.
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- Sun hours / year
- 3,131
- Sunniest month
- February
- Peak score
- 95/100
- Rain / year
- 615 mm
- Midday UV at peak
- 11 (extreme)
- Sea at warmest
- 31°C / 88°F
- Population
- 6k
- Elevation
- Sea level
When is the best time to visit Grand Case?
For sunshine, the best time to visit Grand Case is February, then March and January. The dullest month is October (78/100, 108 mm of rain). The full month-by-month picture is in the table below.
How sunny is Grand Case?
Grand Case is one of the sunniest places on Earth: about 3,131 hours of sunshine a year. February (95/100) is noticeably better than October (78). It is the only destination Sunshine Map tracks in St. Martin. Rain has a clear season: the wettest stretch, around October, carries about 45% of the annual 615 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 94 | 26° / 79°F | 25° / 77°F | 20 mm | 8 | 27° / 81°F |
| February | 95 | 26° / 79°F | 25° / 77°F | 12 mm | 9 | 27° / 81°F |
| March | 95 | 26° / 79°F | 25° / 77°F | 16 mm | 11 | 27° / 81°F |
| April | 93 | 27° / 81°F | 26° / 79°F | 26 mm | 11 | 28° / 82°F |
| May | 86 | 28° / 82°F | 27° / 81°F | 63 mm | 11 | 29° / 84°F |
| June | 90 | 28° / 82°F | 27° / 81°F | 42 mm | 10 | 30° / 86°F |
| July | 88 | 29° / 84°F | 28° / 82°F | 54 mm | 11 | 30° / 86°F |
| August | 86 | 29° / 84°F | 28° / 82°F | 66 mm | 11 | 30° / 86°F |
| September | 81 | 29° / 84°F | 28° / 82°F | 90 mm | 10 | 30° / 86°F |
| October | 78 | 29° / 84°F | 28° / 82°F | 108 mm | 9 | 31° / 88°F |
| November | 83 | 28° / 82°F | 27° / 81°F | 78 mm | 8 | 29° / 84°F |
| December | 90 | 27° / 81°F | 26° / 79°F | 40 mm | 7 | 28° / 82°F |
Sea temperature in Grand Case by month
The sea off Grand Case is warmest in October at around 31°C / 88°F, and coolest in January at 27°C / 81°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.
See Grand Case on the interactive sunshine globe →
Nearby places for sunshine
- Sint Maarten Sint Maarten · 9 km · best in Feb · 3,131 h sun/yr
- Basseterre St. Kitts & Nevis · 94 km · best in Feb · 3,109 h sun/yr
- Antigua Antigua & Barbuda · 171 km · best in Feb · 3,151 h sun/yr
- Christiansted U.S. Virgin Islands · 191 km · best in Feb · 3,158 h sun/yr
- Charlotte Amalie U.S. Virgin Islands · 206 km · best in Feb · 3,108 h sun/yr
- Pointe-à-Pitre Guadeloupe · 260 km · best in Feb · 2,932 h sun/yr
Nearest destinations
- The Valley Anguilla · 12 km · 3,131 h sun/yr · best in Feb
- Gustavia St. Barthélemy · 31 km · 3,109 h sun/yr · best in Feb
- Zion's Hill Caribbean Netherlands · 54 km · 3,239 h sun/yr · best in Feb
- Oranjestad (St. Eustatius) Caribbean Netherlands · 68 km · 3,109 h sun/yr · best in Feb
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