A High Tide Advisory Warning issued by Met Éireann is in place until 11pm on Thursday 11 September.
Met Éireann has advised that Highest Astronomical Tide levels are forecast to be approached or exceeded along all coasts.
This is due to a combination of forecasted storm surge, tidal prediction and wave action.
Galway City Council is advising the public to take extra care near coastal areas as there is a significant risk of wave overtopping.
Motorists are advised to exercise extreme caution when parking near coastal areas and access to Toft Car Park in Salthill is restricted during the period of the high tide advisory.