Why the forecast is the least reliable part of the plan
Four Seasons Before Lunch
Ireland's Atlantic position means weather systems arrive quickly and change their mind just as quickly. It is entirely ordinary for a race to start in drizzle, clear to sunshine by the halfway point, and finish under a squall that wasn't in any forecast. Experienced Irish racers plan for this rather than against it — dressing in a layer they're prepared to lose at the first water station is standard practice, not overcaution. A forecast checked the night before is already slightly out of date by the morning; checking again over breakfast is not paranoia, it's local knowledge.
Wind Is the Real Opponent
More than rain or cold, wind shapes an Irish race. Met Éireann's own figures make the point better than any race organiser could: mean annual wind speed on the exposed northwest coast runs close to double that of the sheltered east midlands, and a west-coast station like Belmullet in Mayo records gale-force days roughly thirty times a year against barely one inland. Coastal and headland courses in particular can turn a comfortable pace into a genuine effort on an exposed stretch, and the same wind that punishes the outbound leg can carry a runner home on the return. Checking wind direction, not just temperature, before a coastal race is worth the two minutes it takes. On out-and-back courses along the Atlantic coast, a headwind on the way out is, more often than not, a small mercy — it means the return leg, when legs are tiring, gets a push rather than a fight.
Dressing for the Start, Not the Finish
The classic mistake, especially among visitors, is dressing for how cold the start line feels while standing still. Ten minutes into a race, that extra layer becomes a liability. The general rule among Irish club runners is to feel slightly cold standing at the start — if you're comfortable waiting for the gun, you're overdressed for the run. Bin bags are a genuinely respected piece of Irish race-day kit: cheap, disposable, worn over a singlet at the start line and discarded at the gun, they keep the worst of a cold, wet wait off without costing anything to lose.
From Running Ireland by F Cosgrove — a guide to the races of the island. Every race in the book is on our race map, county by county, with the month it usually falls in.