Cork City Council has warned that low-lying parts of the city centre may flood prior to and after high tide at around 9am.
However, the council says the main impact of any flooding is expected to be on traffic.
A tidal surge, southerly winds, a low pressure area and a spring tide are expected to give rise to flood conditions.
The council is also warning householders and the owners of businesses to take steps to protect their properties.
It expects the areas that will be affected to include: Union Quay, Morrison's Quay, Father Matthew Quay, South Terrace, Trinity Bridge, Georges Quay, South Mall, Cotter Street, Stable Lane, Lapps Quay, Proby's Quay, Frenchs Quay, Crosses Green, Sharman Crawford Streey, Wandesford Quay, Lavitts Quay, Kyrl's Street and Kyrl's Quay, Coal Quay, and other low-lying areas of the city centre.
Earlier, Cork County Council warned that high spring tides until noon on Friday will affect parts of the south and east of the county.
Evening high tide in the county was between 7.30pm and 9pm, with the morning high tide between 8am and 9.30am. Sea levels expected to be at their highest tomorrow. Meanwhile, Met Éireann has a status yellow wind warning in place for the country, beginning at midnight and valid until 6am Friday. Southeasterly winds are forecast to reach average speeds of 45-60km/h with gusts of 80-100km/h, strongest at the coasts.
