Vieques Island, Puerto Rico Weather
Weather in Vieques is consistent, with only minor changes in temperature annually. The average daytime temperature on Vieques Island throughout the year is 84° to 88° Fahrenheit, increasing only slightly in the summer. Temperatures at night are approximately 10° F lower.
The water temperatures vary between 74° to 80° F so swimming, snorkeling and diving is enjoyable year round. August through late October is rainy season, which can bring high winds and heavy rains, however that does not mean there will be rain, just the possibility of it. You can have 3 days of rain followed by 5 days of Sunshine and clear skies, its up to mother nature. Best Time to Visit