The Met Service has extended its Yellow Level Hazardous Seas Alert.

It will now remain in place until 10am on Friday.

The TTMS says northerly long period swells persist, maintaining hazardous conditions along the northern and northeastern exposed coastlines of Trinidad and Tobago.

It warns that these swells can result in battering waves at coastal regions and can be exacerbated during high tides.

Nearshore activities such as fishing, sea bathing, mooring of boats etc. can be adversely affected.