Galway Co Council said there was a significant risk of flooding and storm damage over the next few days.
High tides in Galway today are at 5.55am and 6.25pm. More high tides will occur tomorrow and Monday.
Car parks in Salthill will close following extensive flood damage there four weeks ago.
Cork Co Council said that its emergency crews were on full alert.
In Kerry, people have been advised to stay away from beaches, cliffs and piers in view of the serious storm and flooding threat.
A number of precautionary measures are in place, say Dublin City Council. High tide in the capital is due at 11.30am today.
The one-tonne sandbags put in place in Clontarf to deal with the January high tides, remain in place in anticipation of more high tides this weekend.
Snow caused difficult driving conditions in some areas of Donegal as yesterday's downpours hit the North West.
Donegal Co Council closed off the quay area of Donegal town ahead of today's expected high tides.
Any areas that have previously flooded are at risk, and people living in such areas are advised to take appropriate precautions, according to Clare Co Council.
It said that storm and flooding was likely to be most severe in coastal areas, including the Shannon Estuary, where the high spring tide of early this morning will coincide with a tidal surge and severe winds.