Alnmouth
Hourly
Confidence
Compare
โฑ๏ธs.
โšก๏ธkJ
Monday 15
Tuesday 16
Wednesday 17
Thursday 18
Friday 19
Timezone:
Europe/London
Wind: โญ UNIFIED
(20251215 03z)
Waves: โญ UNIFIED
(20251215 03z)
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Alnmouth surf forecast characteristics

Swell window
NNE - NE
Swell size
2ft - 6ft
Swell breaks over
Sand
Wave types
Beach
Wave directions
Right, Left
Wind window
SW - W
Works at
Low, Mid, High
Skill Level
Intermediate
Seasons
Winter
Board types
Shortboard, Fish, Longboard, Sup

Alnmouth surf forecast guide

Alnmouth is a long, quiet beach located on the North Sea, featuring a dune-backed stretch of golden sand. This easterly facing spot extends north until it meets a tidal estuary and then pivots to face southeasterly at the old village of Alnmouth. The beach offers a secluded vibe, making it a decent option for those looking to get away from the busier surf spots. Just keep in mind that it's not the best choice for beginners due to its isolation and potential strong rips.

The surf here can range from thigh to head high (about 0.6 to 2 meters), with the best conditions typically found during winter when the bigger swells roll in. The beach can handle swells from the North and NorthEast directions. You can find quality waves breaking over sandbanks and rivermouth sandbars, with both left and right waves. When the conditions are right, especially with swells around 2 to 6 feet (0.6 to 1.8 meters), you might score some fun long rides. Ideal wind directions are SouthWest, WestSouthWest, and West, with low to mid tides generally providing the best settings for a session.

Access to Alnmouth is pretty easy, with parking available behind the dunes to the south of the river or near the golf course to the north. Expect to enjoy a quiet session here, as the crowd factor is low, and the locals are generally friendly. However, be prepared for some hard paddling when the swells are big, and always keep an eye out for rips.

Surf schools and rentals

Surf reports and surf forecasts nearby Alnmouth

Bamburgh
Unknown Region, Unknown Country
Beach break
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Seahouses
Unknown Region, Unknown Country
Beach break
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Embleton Bay
Unknown Region, Unknown Country
Beach break, Reef break
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Alnmouth
Unknown Region, Unknown Country
Beach break
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19
Newbiggin
Unknown Region, Unknown Country
Reef break
Mon 15
Tue 16
Wed 17
Thu 18
Fri 19

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 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.

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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