[Islay] Whisky Characteristics - A Primer

Islay. A small island off the west coast of Scotland, around 3,000 people on it, and the whisky output punches well above that. The reason is peat. That smoke you instantly think of when you hear “Islay” - that’s the story.

What kind of place is Islay

Islay sits on Scotland’s west coast, right next to Jura. The Gulf Stream keeps it milder than you’d expect for that latitude, but the Atlantic wind and rain basically never take a day off. That wet maritime climate is why the island is covered in thick peat bogs, and burning that peat to dry malted barley is where the Islay smoke comes from.

Being surrounded by sea, the whisky picks up seaweed, brine, and iodine notes too. Peat from inland Scotland and peat from Islay aren’t interchangeable - Islay peat has more seaweed and moss in the mix, and that’s what gives you that medicinal, ocean-y nuance you don’t really get anywhere else.

The core of Islay whisky

The three keywords that define Islay: peat, smoke, sea.

• Peat - barley gets dried over a peat fire, and phenol compounds from the smoke soak into the grain. Peat level is measured in PPM (phenol parts per million), and it varies wildly from one distillery to the next
• Smoky - the smoke character that comes from peat. Campfire, smoked meat, medicinal iodine, all different shades of it
• Maritime - sea breeze, seaweed, salt, iodine. When people say Islay whisky smells like the ocean they’re not exaggerating

That said, not every Islay whisky is a peat bomb. Bunnahabhain 12 is famously unpeated, and Bruichladdich The Classic Laddie is another fully unpeated bottling from the island.

The distilleries

Islay currently has ten working distilleries. That kind of density on a single small island is pretty rare globally.

Laphroaig - the face of Islay. Medicinal, iodine, ocean, extreme peat. Love-it-or-hate-it territory, and the lovers don’t go back to anything else. Reportedly the only single malt with a British royal warrant.

Lagavulin - the 16 is the flagship. Smoother and sweeter peat than Laphroaig. Smoky but with dried fruit sweetness woven in - the balance on that one is impressive.

Ardbeg - the most intense peat on the island. The 10 is the usual entry point, and Uigeadail and Corryvreckan are what collectors chase.

Bunnahabhain - the rare unpeated flagship of Islay. The 12 leans on soft sherry cask character, and peat is basically a rumour. If you want Islay without the smoke, Bunnahabhain is the answer.

Bowmore - the oldest distillery on Islay (1779). Medium-peat, sitting somewhere between Laphroaig and Bunnahabhain on the spectrum. The 12 is a solid entry-level bottle.

Bruichladdich - runs three lines under one roof. Unpeated The Classic Laddie, heavily peated Port Charlotte, and the extreme-peat monster Octomore. Octomore sometimes pushes past 200 PPM, which is just silly.

Caol Ila - the highest-volume distillery on the island. A core component of blends like Johnnie Walker, but the single malts are good value too. Light, clean peat. A decent starting point for someone new to the style.

Kilchoman - the newest proper distillery to open on Islay (2005). A farm distillery concept - they grow barley, distil, and bottle on site.

Port Ellen - founded in 1825, closed in 1983, became legendary during its mothballed years as bottle prices went through the roof. Diageo reopened it in 2024 after 40 years, built new facilities, and new spirit is maturing now.

Ardnahoe - the youngest on the island, opened in 2019. Plenty of spirit still aging, so a proper verdict has to wait.

On top of that, independent bottlers have been putting out Islay casks under their own labels. They don’t always name the distillery but the Islay peat character is obvious, and it’s a solid way to get Islay peat at a better price point. If you want a cask strength Islay without breaking the bank, Ileach CS is worth a look.

To wrap up

Islay is polarising. Problem is, once it clicks, everything else tastes a bit flat. For a first step, Lagavulin 16 or Bowmore 12 is where I’d point people. If peat is too much to start with, Bunnahabhain 12 shows you the other side of the island first.