Spring tides occur in autumn too, if your looking for long range information on exceptionally low or high tides then this link is useful: https://www.sfpc.ie/marine-operations/tides/
Look for trends in highs and lows, see page 37 on the row for 30th September 2019 - it reads -0.3 for LW on that day. The negative number means the tide height will be 0.3 m below MLWS - Mean Low Water Springs.
MLWS is a long term average low water reading during a spring tide, a spring tide is an entirely predictable event.
The weather has an impact too, atmospheric pressure can pull or push water across or from the earth - these are called surges and seiches.
The linked tables are for the shannon estuary, you can use the trends observed to predict to the day when an exceptional tide will occur elsewhere in Ireland but the times won't be correct.
Also, if you are planning to take advantage of a low tide to walk out across water, please tell someone ashore what you are doing, when you expect to be back and have more then one phone fully charged. Sunset is getting earlier and the air temperatures are falling too, hypothermia isn't fun and the coastguard are busy enough.