St Lucia Weather: Fair to partly cloudy Loop News Created : 13 June 2018 St. Lucia News Here is a look at the weather in St Lucia, according to information from the St Lucia Met Service. Current weather at the nation’s two airports is fair and hazy. The temperature at Hewanorra Airport at 06:00AM was 28C. The sun sets today at 06:32PM and rises tomorrow at 05:35AM. 24-hour weather forecast: Fair to partly cloudy, hazy and breezy with a few showers. Tides: Castries Harbour: Low at 09:29AM, high at 04:15PM; Vieux Fort Bay: Low at 10:56AM, high at 05:22PM. Seas: Locally rough with waves and swells 6-9ft or 1.8-2.7m.