Machrihanish
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Hourly Forecast
Timezone: Europe/London
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Saturday 13
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Machrihanish surf guide

Machrihanish is a well-known surf spot on the west coast of Scotland, popular for its accessibility from Glasgow. This beach features a long stretch of sand with some rocky outcrops and rivermouth banks that can produce good waves. The spot is quite beautiful but can feel isolated, and it's known for being fickle with a narrow swell window, so it's essential to time your visit right to get the best conditions.

The surf here can range from thigh high to overhead (about 0.6 to 2.4 meters) and is ideal when there’s a solid west or big northwest swell. You can expect mostly beach breaks with waves that can go both left and right. The beach can handle swell sizes from 2ft to 8ft (0.6 to 2.4 meters), and mid tide usually offers the best surfing conditions. The water can get rippy when the swell is bigger, making paddling a bit challenging at times. The optimal wind comes from the east, and most surfers here use shortboards, fish, funboards, longboards, SUPs, or bodyboards depending on their preference and the day's conditions.

Parking is available in Machrihanish, making it easy to access the beach. There’s plenty of room even on busier days, so you won’t feel cramped. The local vibe is generally friendly, and although there are strong rips and currents, it’s a spot that can cater to beginners and intermediates, especially in good conditions. The autumn months from September to November usually see the best surf, so that’s the time to plan your trip if you want to catch Machrihanish at its best.

Surf reports and surf forecasts nearby Machrihanish

Lossit Bay
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Beach break
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Portballintrae
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Beach break
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Laggan Bay
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Beach break
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White Park Bay
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Beach break
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Caravans
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Rivermouth break
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Graveyards
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Beach break
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Middle Beach
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Beach break
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Westport
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Beach break
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Machrihanish
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Beach break
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Dunaverty
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Beach break
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Wind certainty

Wind certainty tells you how much the weather models agree on the forecast.

  • High certainty: Models agree closely; forecast is reliable.
  • Medium certainty: Some disagreement; conditions may shift slightly.
  • Low certainty: Models diverge; treat forecast with caution.

We calculate this by comparing wind speed, gust and direction from multiple models (like GFS, ECMWF, Arome, and Harmonie) and seeing how closely they match. They are weighted, meaning that some models count more than others, depending on how good they are for a certain spot.

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"Great Forecasts. Nothing more, nothing less."

Readme

Welcome! If you’re new to surf forecasting, check out this quick guide.

Forecast Table

The forecast table (the section on the page with all the numbers) is designed to pack as much information in the screen as possible. Although intimidating at first, it will help you make informed decisions about the waves faster, trust me :D. The table consists of roughly four sections, time and predictions, wind, waves, and tides:

🔮 Time and predictions section

Here we show the forecast thour and the overall surf quality prediction. This is determined based on the wave, wind and tide quality prediction. These individual predictions can be found on the forecast map.

💨 Wind section

The first row on the table (with the 💨 icon) shows wind speed, direction and gust. The more the wind speed the more aggressive the color (from blue, green, orange to red).

🌊 Wave section

The waves section consists of three rows, one for wave height and direction, one for period and one for wave energy. Our algorithm choices the "dominant wave". This is normally the first swell partition, but with heavy local storms it displays the wind waves. If that's the case, we display the numbers in italic and in gray.

🌒 Tide section

The tide section consists of a row with the actual heights per hour (measured at the half hour) and a table that displays the flow of the tide and the extremes (lows and highs).

Forecast map

The forecast map consists of arrows. These arrows represent all wave partitions (swell partitions and wind wave partition) and the wind. This allows you to see things like: a secondary swell or wind waves messes up the surf, or the wind is just a tick offshore so very surfable. Click a metric label in the bottom left to bring that arrow to the front — handy when arrows overlap.

Forecast Cheat Sheet

Short on time? Focus on wave energy. It’s the best single metric to gauge how big and powerful the waves will be.

Click any table cell to jump to that forecast hour. The map will update with forecast arrows, so you can see if wind and swell direction are lining up.

Use the table sidebar to switch units for height and speed.

Log your surf sessions to compare forecasts with real sessions and sharpen future predictions.

Models and Updates

Surfnerd blends multiple global and local wind and swell models using advanced interpolation and spatial techniques to create an "ensemble" forecast. Forecasts are refreshed hourly.

Surf Predictions

Our AI-driven algorithm scores surf quality, shown by green, orange, and gray dots. Each forecast hour is rated for wind, swell, and tide quality, then combined into an overall score. Here’s the scale:

Perfect
Good
Average
Bad or No Data

Session logs also feed the algorithm — the more you log, the smarter your forecasts get.

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