Tropical wave brings cloudy intervals in St Lucia Weather August 29 2025
CASTRIES, St Lucia — St Lucia Weather August 29 2025 remained warm and partly cloudy on Thursday, with meteorologists forecasting fair skies that may give way to scattered showers as a weak tropical wave approaches the southern Caribbean.
St Lucia weather to bring light showers amid fair conditions
At noon, forecaster Vigil Saltibus reported partly cloudy skies over Hewanorra Airport and cloudy conditions at GFL Charles Airport. The midday temperature at Hewanorra reached 31°C (88°F), following an overnight low of 27°C (81°F). Relative humidity stood at 74 percent, with easterly winds blowing at 18 mph (30 km/h).
Rainfall totals from the 24-hour period ending 8 a.m. measured 2.0 millimeters at Hewanorra and 8.3 millimeters at GFL Charles, bringing monthly accumulations to 85.8 mm and 92.4 mm, respectively. Sunset is expected at 6:17 p.m., with sunrise on Friday at 5:52 a.m.
Marine conditions and tide forecast
Seas around St Lucia remain slight to moderate, ranging from 3 to 6 feet (0.9 to 1.8 meters). In Castries Harbour, tides are expected low at noon and high again at 7:10 p.m. For Vieux Fort Bay, low tide will occur at 2:00 p.m., followed by a high tide at 8:17 p.m.
Lesser Antilles and tropical outlook
Across the Lesser Antilles, weather will vary between fair and hazy skies with cloudy intervals and scattered showers. However, the far southern Windward Islands can expect more unstable conditions, with thunderstorms possible as a weak tropical wave advances through the region.
Meteorologists also noted another tropical wave over the eastern Tropical Atlantic, slowly moving westward at about 6 mph (9 km/h). Some development is possible over the coming days, which forecasters will continue to monitor.
The Saint Lucia Meteorological Services said the atmosphere across much of the Eastern Caribbean remains moist and unstable enough to generate occasional cloudy periods and showers during the forecast cycle.
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