See when forecast conditions may favour midges across approaches, mid-slopes and summit ground—then plan the timing and height of your day.
Choose a mountain area and forecast day. A higher encounter score means conditions are more favourable for midge nuisance.
The current regional weather report is available, but its midge encounter layer has not yet arrived for this run. Try another day or use the full mountain forecast while it refreshes.
Forecast run: 30 August 2026 at 04:40 UTC.
Midge encounters are highly local. The forecast combines broad weather signals with elevation to describe when nuisance is more or less likely—not how many insects are at one exact spot.
Calmer spells and sheltered terrain are more favourable. An exposed ridge may feel very different from a still glen, woodland edge or lee slope nearby.
Warm-season moisture and humid conditions can support activity, while cold or less favourable seasonal conditions reduce the encounter signal.
The timing pattern matters. The forecast highlights broad peak windows rather than treating the whole daylight period as equally favourable.
Wetter lower ground is often more productive, but a calm spell can still allow midges high on the hill. Summit height alone is not a guarantee.
An approach can pass through wet, sheltered ground before reaching open slopes and a breezier summit. That is why this forecast separates three useful height contexts instead of showing a single number for an entire mountain day.
Local habitat, drainage, vegetation and small sheltered pockets remain beyond a regional model. Treat the score as one planning layer beside wind, rain, cloud and visibility.
How Mountain Weather builds forecast guidance →Open a regional outlook for the hills you plan to visit, from Skye and the western Highlands to the Lake District, Eryri and the Pennines.
For advice on treating bites or a serious reaction, use current NHS insect bite and sting guidance.
It estimates how favourable the forecast weather is for encountering biting midges. It is an encounter guide, not a measured insect count.
Midge activity is most often associated with the warmer months, particularly in damp western and northern areas. The exact start and end vary with local weather and habitat.
They can. Exposed, breezy summits are often less favourable than sheltered lower ground, but elevation is not a guaranteed cut-off during a mild, calm spell.
Check the forecast timing, favour airier locations where appropriate, cover exposed skin and carry a suitable insect repellent. Always make route decisions around the full mountain forecast, not midges alone.