George Town Weather: Seasonal Guide & Climate Insights

Climate Overview

George Town, the capital of the Cayman Islands, is characterized by a tropical marine climate. This results in two distinct seasons: a relatively cool, dry winter (late November to mid-April) and a hot, humid summer (mid-May to October). Because the islands are essentially flat limestone outcroppings, there is little topographic variation to create significant microclimates, though the western side of Grand Cayman—where George Town and Seven Mile Beach are located—occasionally experiences more concentrated afternoon thundershowers than the eastern districts.

Seasonal Dynamics

The Dry Season (November to April)

This is widely considered the most pleasant time of year. Temperatures are moderated by the northeast trade winds, keeping daytime highs around 84°F (29°C) and nightly lows near 73°F (23°C). Rainfall is minimal, with March and April typically being the driest months. The sky is often clear, and the humidity is noticeably lower than in the summer months.

The Wet Season (May to October)

Summer in George Town is marked by intense heat and high humidity. Daytime highs frequently climb to 90°F (32°C), and because the humidity often hovers near 80%, the "feels like" temperature or heat index can regularly exceed 100°F (38°C). Rainfall increases significantly, peaking in September and October. However, rain usually occurs in brief, heavy afternoon bursts or thunderstorms followed by brilliant sunshine, rather than persistent gray days.

Daily Weather Rhythms

A typical day in George Town follows a predictable cycle. Mornings are generally clear and sunny with a gentle breeze. As the sun climbs, the temperature rises rapidly, often triggering localized thundershowers in the late afternoon. These showers are valued by locals as they provide a temporary reprieve from the mid-day heat. Evenings are warm and "muggy," but the coastal sea breezes provide a cooling effect for those near the water.

Unique Weather Phenomena

• The "Northwester": Between December and March, strong cold fronts pushing down from North America can reach the islands. Locals call these systems "Northwesters." They bring a sharp, temporary drop in temperature (sometimes as low as 60°F/15°C) and strong winds that create rough, choppy seas on the western and northern coasts. These events are significant because they briefly disrupt the usually calm waters of Seven Mile Beach.
• Tropical Waves: During the summer, tropical waves (low-pressure troughs) move through the region every few days. These can bring a day or two of increased cloudiness and more sustained rainfall than the typical afternoon shower.
• Hurricanes: George Town sits within the Atlantic hurricane belt. The official season is June 1 to November 30, with peak activity typically occurring between August and October. While direct hits are infrequent, the threat of storms is a core part of the local seasonal consciousness.

The Local Experience

Locals have a high tolerance for the heat but treat the sun with great respect. You will notice that physical activity and heavy outdoor work are often conducted in the very early morning or late evening to avoid the peak UV intensity. During the summer months, life revolves around air conditioning and the ocean, which remains a warm 80°F to 86°F (26°C to 30°C) year-round.

Summary of Conditions