Marwick Surf Forecast

Tide
โฑ๏ธs.
โšก๏ธkJ
Tijdzone:
Europe/London
Wind: SN UNITY Atmos
(20260411 14z)
Golven: SN UNITY WAVE
(20260411 14z)

Golfopbouw

Swell 1Swell 2Swell 3Wind waves

Marwick Surf Forecast Eigenschappen

Swell venster
ZW - N
(Beste uit NW)
Swell hoogte
2ft - 10ft
Swell breekt over
Rots Riggel
Golftypes
Riff
Golfrichtingen
Links, Rechts
Wind venster
ZO - ZO
(Offshore uit ZO)
Werkende getijden
Laag, Mid, Hoog
Niveau
Gevorderde

Marwick Surf Forecast Gids

Marwick is a surf spot located in the Orkney Islands, accessible by a short ferry trip from Gills Bay to Stromness on Mainland. This area features some interesting wave formations, breaking over slabs of slate and sedimentary rock. The waves here can pick up Northwest Atlantic swells as well as Southwest and North swells, although some spots remain unsurfed. It often has strong and consistent winds, so finding the right Southeast winds can take a bit of patience. The scenery is typical of the Orkney landscape, with rugged coastlines and rocky outcrops.

When it comes to surfing at Marwick, the waves can be pretty solid, especially for intermediates looking to improve their skills. The optimal swell direction is Northwest, and it can handle swell sizes starting from around 2 feet (about 0.6 meters). The waves here come mainly from rock ledges and form both left and right waves. For the best session, aim for low to mid-tide or even high tide as it works well across various tide levels.

While Marwick has some known spots, thereโ€™s a lot of potential in the area. It's not just about the popular breaks; the moody slab reefs to the north can really amplify swell. If you're willing to explore a little, you might find uncrowded waves and different setup options that appeal to what you like to ride. Just be ready for a bit of a trek to some of these spots, as they can be off the beaten path.

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Readme

Welcome! If youโ€™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:

๐Ÿ”ฎ 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.

๐Ÿ’จ Wind section

The first row on the table (with the ๐Ÿ’จ icon) shows wind speed, direction and gust. The more the wind speed the more aggressive the color (from blue, green, orange to red).

๐ŸŒŠ 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 chooses the "dominant wave" using spot-adjusted surf energy (depth + directional fit). This is usually the first swell partition, but during local storms it can switch to wind waves. If that happens, values are shown in gray and italic.

๐ŸŒ’ 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 โ€” handy when arrows overlap.

Forecast Cheat Sheet

Short on time? Focus on wave energy. Itโ€™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. Hereโ€™s the scale:

Perfect
Good
Average
Bad or No Data

Session logs also feed the algorithm โ€” the more you log, the smarter your forecasts get.

With Surfnerd, no more "you should have been here yesterday"

Confidence

Confidence tells you how much the weather models agree on the forecast.

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

We calculate the wind confidence by comparing wind speed, gust and direction from multiple models (like GFS, ECMWF, Arome, and Harmonie) and seeing how closely they match. For wave certainty we compare height, period and direction, also on multiple models. 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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