Midge repellent Scotland searches tend to come from people who have just been bitten, or who are about to book a trip and dread it. The short version: the Highland midge is a tiny, weather-driven biter that is most active from May to October, mainly at dawn and dusk and on still, damp, overcast days. A repellent made for midges, applied to exposed skin, is the advice the official tourism body gives, and a few field trials back up the idea. This article pulls together what public sources say about the insect, the season, the weather and the evidence for repellents, and says plainly where the evidence runs out.
Midge repellent Scotland: the short answer
VisitScotland's midge guidance is direct. It says to "look for products designed for midges", to "apply to exposed skin" and to "reapply as needed, especially after rain or sweating" (VisitScotland, midges and ticks). It also lists long sleeves and trousers, light-coloured fabrics, trouser clips or gaiters in higher-risk areas, and a head net, which it calls "useful in peak midge areas".
That is practical advice, but it does not tell you which active ingredient to pick, and neither does this article. What we can do is show what was actually measured. One field trial in Scotland compared a eucalyptus-derived repellent (PMD) with deet and found both gave very high protection for hours. Other work on plant-based and body-odour compounds is promising but mostly experimental. We come back to the numbers below.
When is midge season in Scotland?
VisitScotland puts midge season "typically from May to October, with peak activity in the middle of summer". A profile of the Highland biting midge (Culicoides impunctatus) from Trees for Life, hosted on the Scottish Outdoor Access Code website, fills in the lifecycle behind that window. The larva passes the winter in its final growth stage. Triggered by rising temperatures and day length, it pupates between mid-May and July, and the adult emerges with a lifespan of 20 to 30 days. The same profile says mass attacks happen "at the height of the midge season in July and August", that numbers decline in September, and that the first autumn frosts kill the survivors (Highland biting midge factsheet).
So the honest answer to "when should I worry?" is a broad one. The window is May to October, the worst of it is June to August in most telling, and a warm, still evening in late September can still bring a few. If you are comparing Scotland with the rest of the UK, our UK biting insects field guide sets midges next to mosquitoes, horseflies and ticks.
What time of day and weather do midges like?
Light matters most. The Trees for Life profile calls midges crepuscular, meaning most active around dawn and dusk, and says light is "the most significant environmental factor" for biting: on a bright sunny day few may be met, but on a dull, overcast day "substantial numbers may bite, even in the middle of the day".
VisitScotland says the same thing in plainer words: midges are most active at dawn and dusk "and in still, damp conditions", and activity "changes daily depending on weather like wind and humidity".
Wind is the one factor with a number attached. The profile states that at wind speeds of over 8.8 kilometres per hour (5.5 miles per hour) midges cannot fly, and settle on ground vegetation or tree trunks. It adds that they are rarely met above about 500 metres, where the wind limits their flight. In practice that is why a breezy ridge feels like a different country from the sheltered loch shore below it.
Where in Scotland are midges worst?
Scotland has 37 recorded Culicoides species, and the Highland biting midge is responsible for up to 90 per cent of bites on humans, according to the same profile. It occurs throughout the country but is most abundant in the west and the north, where boggy, acidic ground suits breeding. VisitScotland points to "the west Highlands, islands, and damp rural areas", and notes that midges gather in woodland, near water and in humid areas.
Midges also do not travel far. The profile says they rarely disperse far from their breeding grounds, though a gentle breeze can carry them a kilometre or more. The practical reading: wet ground, still air and low light, in the west or north, is the worst combination. Dry, open and windy is the best.
What do field trials say about midge repellents?
Here the evidence is thinner than the marketing around it, so it helps to be exact about what each study did.
A eucalyptus-derived repellent against deet. In a Journal of the American Mosquito Control Association study, Trigg evaluated a PMD (eucalyptus-based) repellent against Culicoides impunctatus in Scotland, compared with deet. In human landing catches, "both repellents still afforded 98% protection from biting 8 h after application" of 0.5 ml to the forearm. A second trial covering 8 to 10 hours found 99.5 per cent protection for PMD and 97 per cent for deet compared with controls (Trigg, 1996). That is a 1996 trial of the products and doses tested then. It does not tell you how any particular spray or cream on a shelf today will behave.
Neem oil. A 2004 paper in Medical and Veterinary Entomology tested neem oil on Culicoides biting midges. Blood-feeding by wild-caught C. impunctatus females was completely prevented at concentrations of 1 per cent or more in a membrane-feeder test, and the authors went on to develop 2 per cent neem-based formulations for personal protection (Blackwell et al., 2004). It is laboratory work and a development step, not a field result on people.
Compounds from human skin odour. In the Journal of Medical Entomology, Logan and colleagues found that certain chemicals present in the odour of people who attract fewer midges were repellent. A mixture of two of them, 6-methyl-5-hepten-2-one and geranylacetone, showed field repellency of 87, 77.4, 74.2 and 31.6 per cent at hours 0, 1, 2 and 3, and the authors say it has "the potential to be developed" as a new repellent (Logan et al., 2009). Note the fall-off by hour three. This was a research mixture, not a product you can buy.
What we could not find. Plenty of people in the Highlands swear by particular creams, bath oils and home remedies. When we searched the Europe PMC index on 19 October 2026 for the Skin-So-Soft brand together with midge, it returned no repellent trial. That is not proof such products do nothing, only that we found no published test to cite, so we make no claim either way. The same goes for sprays, wristbands and plug-in devices: we are describing the studies we found, not ranking products.
For how long a repellent of any kind stays effective on skin, and why labels differ, our piece on how long repellent lasts goes through the general principles.
Why do midges bite some people more than others?
If you are the one in the group covered in bites, you are not imagining it. A questionnaire study of Scottish visitors and residents in BMC Public Health found that 85.8 per cent of respondents said they were bitten sometimes, often or always, and 33.8 per cent reported a bad or severe reaction. The authors concluded that midges seemed to prefer tall men and women with a higher BMI, and that susceptibility looked hereditary (Logan et al., 2010). It was self-reported, so the authors flag subjectivity as a limit.
The Trees for Life profile adds that female midges are drawn to dark-coloured moving objects, especially where carbon dioxide from breath is present, and that they detect body-odour chemicals such as lactic acid and acetone. That is why VisitScotland's clothing advice favours light-coloured fabrics.
What to do after a midge bite
NHS inform describes bites from midges, mosquitoes and gnats as causing "small papules (lumps)" that "are usually very itchy", and says some people also develop fluid-filled blisters or weals (NHS inform, types of bites and stings, last updated 30 September 2026). For care, the NHS in England says to wash the area with soap and water, to apply a cold, cloth-wrapped ice pack for at least 20 minutes if there is swelling, and that "do not scratch the bite or sting, as it could get infected". It lists painkillers, an antihistamine for itching or a hydrocortisone cream as options, and says to see a pharmacist if the area looks red, hot, painful or swollen, or has pus (NHS, insect bites and stings, page last reviewed 1 June 2023). Anything worsening or unusual is a question for a pharmacist or GP, not for a blog.
Where Misaj fits
Misaj, a Paris based skincare brand, makes Glow Protect. Its product page describes it as a cream that "combines hydration, skin barrier support and botanical mosquito protection in a single cream designed to be worn daily". The wording is about mosquitoes. The page does not mention midges, and we are not saying Glow Protect deters them. It is a daily skincare cream, not a registered repellent, so for a Highland midge season you would follow the guidance above and choose a product made for midges. If you want to see how Misaj describes the mosquito side, the full details are on the Glow Protect product page. For the wider mosquito picture in Britain, see are there mosquitoes in the UK.
The takeaway
Midge season in Scotland runs roughly May to October, with the worst biting in the height of summer, at dawn and dusk, in still, damp, overcast weather and mostly in the west and north. Official advice is to use a repellent made for midges, apply it to exposed skin and reapply after rain or sweating, and to cover up with light-coloured clothing. One Scottish field trial found high protection from both a eucalyptus-derived repellent and deet, though it is a 1996 study. Other approaches are still at research stage, and we found no published test for popular folk remedies.
Frequently asked questions
When is midge season in Scotland?
VisitScotland describes it as typically May to October with peak activity in the middle of summer. The Trees for Life profile places mass attacks in July and August, with numbers declining in September.
What time of day are midges worst in Scotland?
Dawn and dusk. VisitScotland adds that they are most active in still, damp conditions, and the Trees for Life profile says that on dull, overcast days substantial numbers may bite even in the middle of the day.
Does wind keep midges away?
Wind helps. The Trees for Life profile says midges cannot fly at wind speeds over 8.8 kilometres per hour (5.5 miles per hour) and are seldom found above about 500 metres, where wind limits their flight.
What repellent should I use for midges in Scotland?
VisitScotland advises products designed for midges, applied to exposed skin and reapplied after rain or sweating. In a Scottish trial, a eucalyptus-derived repellent (PMD) and deet each gave 97 per cent or more protection in the periods tested, but that was a 1996 study, so check the label of any product you buy.
Why do I get bitten more than my friends?
A survey of 2010 found that midges seemed to prefer tall men and women with a higher BMI, and that susceptibility appeared hereditary. It was based on self-reported answers.
Sources (fetched 2026-10-19)
- VisitScotland, Midges and ticks in Scotland (season, time of day, weather, locations, repellent and clothing advice). https://www.visitscotland.com/travel-planning/midges-ticks-scotland
- Alan Watson Featherstone (text), Trees for Life, Highland biting midge (Culicoides impunctatus) factsheet, hosted on the Scottish Outdoor Access Code website (lifecycle, season, light, wind speed, distribution, attraction). https://www.outdooraccess-scotland.scot/sites/default/files/2018-10/Highland%20biting%20midge%20-%20Midges%20for%20walkers%20-%20factsheet.pdf
- Trigg JK, Evaluation of a eucalyptus-based repellent against Culicoides impunctatus in Scotland, Journal of the American Mosquito Control Association 1996;12 (abstract via Europe PMC). https://pubmed.ncbi.nlm.nih.gov/8827615/
- Blackwell A, Evans KA, Strang RH, Cole M, Toward development of neem-based repellents against the Scottish Highland biting midge Culicoides impunctatus, Medical and Veterinary Entomology 2004;18 (abstract via Europe PMC). https://pubmed.ncbi.nlm.nih.gov/15642014/
- Logan JG, Seal NJ, Cook JI, et al., Identification of human-derived volatile chemicals that interfere with attraction of the Scottish biting midge and their potential use as repellents, Journal of Medical Entomology 2009;46 (abstract via Europe PMC). https://pubmed.ncbi.nlm.nih.gov/19351071/
- Logan JG, Cook JI, Stanczyk NM, et al., To bite or not to bite! A questionnaire-based survey assessing why some people are bitten more than others by midges, BMC Public Health 2010;10:275 (abstract via Europe PMC). https://pubmed.ncbi.nlm.nih.gov/20500852/
- NHS inform, Types of bites and stings, last updated 30 September 2026. https://www.nhsinform.scot/illnesses-and-conditions/injuries/skin-injuries/types-of-bites-and-stings/
- NHS, Insect bites and stings, last reviewed 1 June 2023. https://www.nhs.uk/conditions/insect-bites-and-stings/
- misajskin.com, Glow Protect product page, wording checked 19 October 2026. https://misajskin.com/products/glow-protect