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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Norwich Wire weather desk. Data from national met services via Open-Meteo.
St Lucia’s daytime temperatures sit between 28 °C and 32 °C year‑round, with the live forecast above showing current conditions in Castries. The island has a tropical climate with a wet season (June–November) and a drier, sunnier season (December–May), moderated by trade winds.
How does St Lucia weather vary by month?
The wet season sees highest rainfall in October and November – st lucia weather october averages around 250 mm of rain, while st lucia weather november remains humid before the dry shift. From December to May, rainfall drops sharply; March and April are the driest months, with roughly 50 mm each. Temperatures are remarkably stable: st lucia weather by month shows a narrow range of 26 °C to 29 °C, meaning there’s no true cool season. For a closer look, st lucia weather castries can be a few degrees warmer inland than on the coast. You can compare this tropical pattern with UK conditions on our UK weather hub or check the 10‑day weather forecast UK for contrast.
What should visitors know about seasonal conditions?
St lucia weather year round is warm and humid, but sea breezes keep coastal areas comfortable. The dry season (especially February–April) offers the most reliable sunshine for beach holidays. For st lucia weather 14 days or st lucia weather 21 day forecast updates before travel, check extended outlooks from the live forecast above. Weather in saint lucia 10 days will show the typical pattern of short, sharp tropical showers in the wet season and long sunny spells in the dry season.
When is the hurricane season in St Lucia?
Hurricane season runs from June to November, with the highest risk in August and October. Storms are not guaranteed, but travellers should check the live forecast above and travel insurance before visiting in those months.
What is the sea temperature around St Lucia?
Sea temperatures range from 27 °C in February to 29 °C in September, making swimming and snorkelling comfortable all year. The warmest water coincides with the wet season, but conditions remain safe in most coastal areas.
Is St Lucia humid all year?
Humidity is high year‑round (70–85 %), but trade winds provide noticeable relief, especially on the windward east coast. The dry season feels less muggy because rainfall is lower, even though humidity levels stay similar.