You've booked the cottage. You've polished the walking boots. You've told everyone you're finally doing the West Highland Way.
And then someone says: "Oh, you're going in June?"
Here's what they know that you don't.
The season runs longer than the brochure admits
Scottish midges are active from late May through to mid-September — roughly four months of the year during which any plan involving the outdoors comes with a small, invisible, furious asterisk.
The peak is June and July. This is when the first generation hatches, the numbers are at their highest, and the west coast earns every word ever written about it. August is lighter but still active. September is genuinely beautiful and genuinely survivable — the midges are thinning, the light is extraordinary, and the tourists have gone home.
May, in the right (wrong) conditions, can catch you by surprise. Early hatches in warm years have been recorded as far back as mid-April in sheltered west coast glens.
The forecast matters more than the calendar
Here's what most articles miss. The season dates give you a range. What actually determines whether any given day is tolerable or nightmarish is the weather on that specific day, in that specific place.
Midges do not operate in wind above about 7mph. They hate direct sunlight. They thrive in still, overcast, humid conditions — precisely the weather that Scotland specialises in producing without warning.
This is why the date in your calendar is the least useful piece of information you have. A sunny, breezy July afternoon on the Cairngorm plateau can be completely midge-free. A grey, windless Thursday in September in Torridon can be an ambush.
The Midge Activity Index — what BiteForecast calculates across 20 Highland locations — uses real wind speed, temperature, humidity, and cloud cover data to give you a daily forecast rather than a season estimate. The season tells you when to worry. The forecast tells you whether today is the day.
The locations that earn their reputation
The west coast is worse than the east. This is consistent, year on year, and rooted in geography. Higher rainfall, more sheltered glens, more still water. Skye, Torridon, Loch Maree, the Great Glen, and the Ardnamurchan peninsula are the Hooligan's territories of particular honour.
The Cairngorms are genuinely better — higher altitude, more exposed, more wind. Fort William sits awkwardly in the middle: decent altitude on the Ben, but the town itself in a sheltered valley position that the midges appreciate enormously.
When to go
If you can choose your window: late September is the sleeper pick. The midges are dying off, the stags are roaring, the bracken has turned, and the midges that remain lack the energy of their midsummer ancestors.
If June or July is unavoidable: plan for early mornings and windy ridges. Check the forecast before you commit to the glen.
If someone tells you there are no midges this year: they are lying, or they haven't been outside yet.
Check today's Midge Activity Index for your location at BiteForecast.