Met Éireann warns rainfall will hit 2-3 times average this week

Rainfall across Ireland will run at two to three times the weekly average over the coming days, Met Éireann has warned, with the southwest in line for the heaviest accumulations. The unsettled spell begins on Tuesday, October 20, and persists through the October Bank Holiday weekend.

For farmers, the consequence is immediate. From Tuesday onward, Met Éireann expects drying conditions to deteriorate and spraying opportunities to become limited. Any crop protection work still outstanding should be completed in the narrow window that remains on Monday and Tuesday morning.

What does the week look like day by day?

Mist, fog and frost clear on Monday morning (October 19), giving way to bright spells and highest temperatures of 9° to 13°C in light east to northeast breezes. Cloud builds from the southeast later, bringing rain and drizzle to parts of the south and east. Overnight lows fall to between 2° and 7°.

Tuesday starts mainly dry, but rain in the southwest extends eastwards during the afternoon, with some heavy falls in places. Afternoon highs reach 10° to 14°C in light to moderate southeasterly winds. Tuesday night turns wet and windy, with moderate and at times fresh westerly winds. The rain clears from the west by morning, followed by scattered showers.

Wednesday brings lingering rain in the east, with sunshine and scattered showers elsewhere. Moderate to fresh westerly winds blow all day. Highs of 8° to 12°C, with overnight lows of 3° to 7°C and showers confined to western coasts overnight.

Thursday is the day to watch. Showers in the morning give way to rain arriving in the southwest by afternoon, with some heavy falls likely. The rain spreads to all parts during the day before clearing eastwards overnight. Met Éireann forecasts very windy conditions, with strong and gusty northwesterly winds and top temperatures of 10° to 13°C.

Friday holds scattered showers and blustery conditions, with highs of 8° to 11°C.

What about the Bank Holiday weekend?

The current outlook keeps the country unsettled through the October Bank Holiday weekend, with further rain and blustery conditions. No sustained dry interlude appears in the forecast beyond Wednesday's partial clearance.

What does this mean for soils and fieldwork?

The agronomic picture is the sharpest signal in the forecast. Rainfall at two to three times the percentage average will land on ground that has limited capacity to absorb it.

• Air temperatures will run up to 2° below average over the next seven days.
• Mean soil temperatures will stay above average, though trending closer to normal.
• Soil moisture deficits will remain saturated in well-drained soils.
• Moderately drained soils will become waterlogged, or close to it, nationwide.
• Poorly drained soils will remain waterlogged throughout.

The combination matters for late-season decisions. Soils above-average in temperature but saturated at the surface shorten the working window on any ground class, and machinery traffic risks compaction and rutting that carries into spring. Livestock farmers on heavy land face poaching pressure as the weekend approaches.

Spray operators should treat Monday and early Tuesday as the last reliable window. Growth regulators, late fungicides and herbicide applications that depend on leaf retention and drying leaf surfaces will struggle after that. One to two days of usable conditions is all the forecast currently offers before Thursday's wind and rain close the door again.

Farmers should monitor Met Éireann advisories through the Bank Holiday weekend, as further warnings for wind and rainfall accumulations may follow once the Thursday system tracks more clearly.