Early Hurricane Season Brings Tropical Waves and Heavy Showers

Weekly Highlights

🌡️Hottest Saint Thomas34°C93°F Jun 24❄️Coolest Antigua and Barbuda23°C73°F Jun 23💨Windiest Barbados48 km/h30 mph Jun 22🌧️Wettest Dominica48.2 mm1.9 in (Jun 29, 18 mm0.71 in)☀️Driest Sint Eustatius0 mm0 in

Based on data collected across 18 Eastern Caribbean islands over the past 7 days.

Regional Conditions

The Eastern Caribbean entered the final week of June under the influence of several tropical waves moving westward across the Atlantic basin. Temperatures across the region ranged from 23°C73°F in Antigua and Barbuda to 34°C93°F in Saint Thomas over the past seven days. Average humidity remained elevated at 87%, typical for the season.

Winds were generally moderate, with Barbados recording peak gusts of 48 km/h30 mph. Rainfall was unevenly distributed, with Dominica receiving 48.2 mm1.9 in while Sint Eustatius recorded none. Prevailing conditions featured scattered to broken cloud cover across most islands.

This Week's Outlook

A tropical wave currently positioned along 66 degrees west continues to move westward across the region at approximately 37 km/h20 kt. The Antigua Meteorological Office expects this system to maintain periods of showers across the islands over the next 24 hours, with particularly heavy downpours and thunderstorms possible across the Leeward Islands extending southward to Trinidad and Tobago. Winds will remain generally light to moderate, ranging from 11 to 30 km/h7 to 18 mph out of the east to east-southeast.

Sea conditions will be relatively calm, with heights of 1 to 2.1 metres3 to 7 feet expected. Saharan dust concentrations will return in varying amounts, particularly affecting air quality and visibility in some areas.

Tropical Activity

The National Hurricane Center is monitoring three separate tropical waves across the Atlantic basin as early hurricane season gains momentum. A far eastern Atlantic tropical wave positioned along 26 degrees west, south of 16 degrees north, is moving westward at 28 to 37 km/h15 to 20 kt with minimal convection at present. A second tropical wave along 55 degrees west south of 13 degrees north shows scattered moderate convection between 10 degrees north and south, also moving westward at 37 km/h20 kt.

The third and most significant wave for the Eastern Caribbean currently sits along 66 degrees west with scattered to moderate convection from 17 to 22 degrees north. An upper level low pressure system north of the Leeward Islands is combining with a surface trough to produce scattered showers and isolated thunderstorms across parts of the northern Atlantic. The broader Atlantic basin remains dominated by a subtropical high pressure ridge supporting moderate easterly trades.

For complete details on these systems, current satellite imagery, and extended forecasts, visit the outlook page.

The 2026 Atlantic hurricane season is now in full swing, with multiple tropical waves and moisture-laden systems moving across traditional development zones. Residents and visitors should stay informed about changing conditions throughout the week, particularly those in the Leeward Islands and areas south toward Trinidad and Tobago where heavier rainfall is forecast. For detailed, island-by-island weather conditions and hourly updates, visit the weather page.

To track systems in real time with live radar and satellite imagery, check the interactive map.