Natural Resources Wales is urging people to take action and be prepared as high tides combined with strong winds could lead to coastal flooding over the coming days.
Pembrokeshire is among the areas covered by a coastal flooding warning on the Environment Agency live flood warning map (http://www.environment-agency.gov.uk/homeandleisure/floods/142151.aspx).
Pembrokeshire County Council said tidal Flood Warnings will be issued for the 7.20am high tide tomorrow (Friday, 3rd January) for the following locations:
• Lower Town Fishguard
Disruptions are also likely on the A487 at Newgale.
Other locations of concern are Commons Road, Pembroke, and coastal locations such as Little Haven and Broad Haven are likely to be affected as well.
Members of the public are advised to keep abreast of news broadcasts for travel and other disruptions and exercise care near the coast.
High tides are predicted to continue into the weekend.
Winds are forecast to be force 6 to 8 from a south westerly direction. The highest tides are forecast for Friday morning and are likely to coincide with storm surge, winds and large waves.
Most of the Welsh coastline is likely to experience stormy conditions, and the effects are likely to be worst with the high tides from Thursday evening through to Saturday, with tidal surges and large waves potentially causing localised flooding.
This is likely to lead to a large number of coastal Flood Warnings and further Flood Alerts being issued across the Welsh coastline.
People living near the coast should be prepared, and should be careful not to walk or drive too close to the coast during high tide, said Natural Resources Wales.
People are advised to stay clear of promenades and should not stand too close to the sea front as they could be swept away by large waves or hit by debris.
Emergency response workers will be at key sites checking that Natural Resources Wales coastal defences are in good working order and making sure any drainage grids and screens are clear, to reduce the risk to people and their homes.
Officers are also working closely with relevant local authorities and emergency services to make sure that areas are prepared ahead of the forecast.
Flood water can be extremely dangerous, and people should not attempt to walk or drive through it unless instructed by the emergency services.
Flood alerts and flood warnings are updated on the Natural Resources Wales website every 15 minutes and are available to view at www.naturalresourceswales.gov.uk/alerts
Information and updates are also available by calling Floodline on 0845 988 1188.