Weekend weather: Mixed and mild with rain and wind

Is your ground firm enough to carry a tanker, or are you already looking at wheel ruts the moment you drive onto the paddock? That one question matters more this weekend than any single temperature or rainfall figure in the forecast.

The short version: light, free-draining soils in the east and south may still offer a narrow spreading and harvesting window before Tuesday, but moderately and poorly drained ground in the midlands and west is likely already past the point where machinery can travel without damage.

What’s actually happening to the ground this weekend

Mixed and mild conditions sound harmless, but “mixed” is doing a lot of work in that headline. A spell of wet weather moving through, easing briefly, then returning with heavier rain and strengthening southerly winds by Tuesday means the soil profile gets repeated top-ups of moisture without enough dry, breezy spells in between to let it drain or evaporate. Soil doesn’t care what the air temperature is doing — what matters is how much water is already sitting in the pore space below the surface, and whether this weekend adds to that or finally gives it a chance to shed some.

Trafficability — whether land can bear the weight of a slurry tanker, a mower, or a herd of cattle without smearing, compaction or deep rutting — depends on three things working together: soil type, drainage class, and how much rain has already fallen into that profile before this weekend even starts. A sandy or light loam soil in a well-drained part of the east can absorb a burst of rain and still carry weight within a day. A heavier clay-based or poorly drained soil, common across parts of the midlands and west, holds water near the surface far longer and can stay unworkable for a week or more after what looks like a modest rain event.

Why the regional soil differences matter more than the forecast number

This is the detail that gets lost when a forecast is read purely as a run of temperatures and rainfall chances. Two farms fifty kilometres apart, both getting the same rain this weekend, can be in completely different positions by Tuesday morning. A farm on light, free-draining soil in south Leinster or parts of Munster may still have a workable morning or early afternoon before the Sunday rain arrives from the south and west. A farm on moderately drained or heavy soil in the midlands, or in parts of Connacht where drainage is naturally slower, may already be too soft to risk a tanker, regardless of what the sky looks like on the day.

The practical test hasn’t changed in decades and still beats any app: walk the field, press a boot heel in firmly, and see whether water rises to meet it or the ground holds its shape. If a tractor or quad has already left visible wheel marks from recent passes, that field is telling you its answer before the forecast does.

The slurry deadline is closing faster than the calendar suggests

Ireland’s slurry spreading season runs to a fixed closing date each autumn, and the regulatory deadline doesn’t move just because a wet weekend arrives at an inconvenient time. What does move is the realistic number of spreading hours left before that date. If the ground is already saturated going into Friday and further rain falls through the weekend and into Tuesday, the actual dry, trafficable window left to legally and safely spread may be far shorter than the number of calendar days remaining suggests. A farmer who had planned to spread early next week, assuming conditions would hold, may now need to bring that forward to whatever dry or breezy spell appears first — even if it means spreading earlier than originally planned, on a day that looks less than ideal otherwise.

Spreading on soil that’s already waterlogged doesn’t just risk compaction. It increases the chance of slurry running off rather than soaking in, particularly on sloped ground, which is both a nutrient loss for the farm and an environmental risk that regulations are specifically designed to prevent. If the choice is between spreading into marginal ground now or missing the deadline altogether, neither is a good outcome — which is exactly why identifying the driest remaining window this weekend, field by field, is worth more than waiting for a forecast to “improve.”

Wind direction changes the harvest and spraying calculation too

The forecast wind shift from a more westerly flow into a southerly one by the time the heavier rain arrives isn’t just a detail for sailors. A southerly wind ahead of an advancing rain band tends to bring higher humidity with it, which slows the drying of cut silage or hay far more than a westerly breeze of similar strength would. Anyone with grass already cut or planning to cut this weekend should treat the early part of the window, while the air is drier and the wind still has some westerly influence, as the better opportunity — not the tail end of Saturday into Sunday, when rising humidity ahead of the rain will make it harder for cut grass to lose moisture even without rain actually falling on it.

The same shift matters for anyone with spraying planned. Wind direction affects drift risk around watercourses and neighbouring land, and a changing wind means a spray plan that looked safe on Friday may not hold by Sunday. Checking wind direction at the time of application, not just wind speed, is the detail that’s easy to skip under time pressure.

What this means for housing decisions

Overnight conditions this weekend are mild rather than cold, but the real factor for stock still out is the gap between soil temperature underfoot and air temperature overhead, not the air temperature alone. Saturated, cold soil beneath livestock draws heat away from them even when the air feels mild, and ground that’s holding standing water increases the risk of foot problems and mastitis-related issues in dairy cows in particular. Farmers with stock on moderately or poorly drained paddocks that are already soft should treat this weekend as a decision point for early housing, rather than waiting for a hard frost or a dramatic drop in air temperature that, this time, isn’t actually coming.

What to do before Tuesday

• Walk and test each field individually rather than assuming all ground on the farm is in the same condition — regional and even field-to-field drainage differences are larger than the forecast gap between “mixed” and “unsettled.”
• Treat the first dry or breezy spell this weekend as the spreading window, rather than waiting for a forecast improvement that may not arrive before the deadline.
• Cut and harvest earlier in the window while westerly influence remains, rather than later as southerly, more humid air moves in.
• Check wind direction at the time of spraying, not just the speed, given the forecast shift.
• Move stock off soft, poorly drained paddocks before they’re forced off by standing water, rather than after.

How is your own ground holding up this weekend — are you still able to travel it, or has the decision already been made for you?