WIND AND WEATHER IN THE GRENADINES

The weather on Union Island and in the Grenadines is different than the weather on the main island of St. Vincent.
The island are so small that most of the phone weather apps and website will not give you an accurate reading.
The Air temperature is 30°C all year long and the Water temperature is 28°C with very sunny weather most of the year.

Good weather all year

The high season from the beginning of November until the end of July offers sunny weather, very little rain, and great trade winds to cool you down from the hot days. For travel planning, see our best months for kitesurfing in the Caribbean guide.

From August to the end of October the weather can be amazing with little showers in the morning but clearing out for the afternoon.

Excellent Wind and Temperature

The Trade Winds blow consistently from November to the end of July and weaken in August until the beginning of November. See the Union Island wind season and weather by month notes for more detail.

The Air temperature is 30°C all year long and the Water temperature is 28°C so no need to bring a wetsuit.

Low rainy Season - August to October

Union Island is in the southern Caribbean, but hurricane season still needs to be treated seriously. From July to the end of October, guests should check seasonal updates, travel guidance, and weather information before visiting.

Outside the trade wind season, weather can still be beautiful, but wind is less reliable and travel plans should be checked close to the date.

OUR AMAZING WIND STATISTICS

BEST SEASON FROM NOVEMBER TO JULY

Percentage of wind over 15 knots

  • November 50% 50%
  • December 95% 95%
  • January 100% 100%
  • February 95% 95%
  • March 90% 90%
  • April 80% 80%
  • May 75% 75%
  • June 95% 95%
  • July 70% 70%
  • August 30% 30%
  • September 20% 20%
  • October 20% 20%

Have a look at our Weather Forecast page for a detailed statistic of the trade winds in the Grenadines.