Gills Bay Slab is one of Europe's heaviest waves--a monstrous left-hand slab that only comes alive during the most violent winter storms.
Model forecast for swell, wind and tide.
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Water temp
9°C
Wetsuit
6/5mm + boots, gloves, hood
Difficulty
10/10
Crowd level
1/10
Gills Bay Slab is a slab in Caithness, UK, that mostly breaks left.
Gills Bay Slab picks up swell from the NNW round to the ENE, and it's best when it's coming straight out of the NNE. It starts working at around 2.5m and handles up to about 5m, with the sweet spot around 3.6 to 4.4m. Period matters too: aim for 16s or longer, as anything under 12s tends to be weak. These are the numbers our scoring uses, so treat them as a guide rather than a promise.
A SW wind is dead offshore at Gills Bay Slab, and anything from the S round to the W keeps it clean. Light winds from other directions can still be fine; strong offshores can make it hard to get into waves.
Gills Bay Slab is at its best around the mid to high tide.
The most reliable run of swell at Gills Bay Slab comes Nov to Feb. There's a second window in Mar and Oct too.
The water at Gills Bay Slab averages around 9°C, so you'll want a 6/5mm with boots, gloves and a hood. It shifts a few degrees through the year, so check the season before you pack.
No. As a slab, it's strictly for experienced surfers. The lineup is usually quiet (crowd 1/10). Monster slab. Expert only. One of Europe's heaviest waves. Water temps can drop to 7C.
The nearest airport on our list is WIC, then it's roughly a 25-minute drive.
The closest breaks we track are Dunnet Bay (15 km), Murkle (21 km) and Thurso East (23 km), handy when Gills Bay Slab isn't working. We track 8 spots around Caithness in total. Fun fact: it's the third most northerly break we track in UK.
Peak: Nov, Dec, Jan, Feb
Secondary: Oct, Mar
Caithness' friendly beach - Beginner to intermediate - Near Thurso
Caithness left slab - Backdoor barrels - Expert territory
Scotland's world-class right - Cold water perfection - North Atlantic power
Remote Scottish slab - Almost un-surfed - Maximum consequence
Heavy Scottish slab - Remote Caithness coast - Freezing barrels
Caithness left reef - Cliff access - Remote and empty
Compare this break with other destinations in these surf guides.