Sangamankada
Hourly
Confidence
Compare
⏱️s.
⚡️kJ
Tuesday 02
Wednesday 03
Thursday 04
Friday 05
Saturday 06
Timezone:
Asia/Colombo
Wind: ⭐ UNIFIED
(20251202 18z)
Waves: ⭐ UNIFIED
(20251202 18z)
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Sangamankada surf forecast characteristics

Swell window
S - N
(Best from SE)
Swell size
1ft - 4ft
Swell breaks over
Sand
Wave types
Rivermouth
Wave directions
Right
Wind window
SW - SW
(Offshore from SW)
Works at
Low, Mid, High
Skill Level
Beginner

Sangamankada surf forecast guide

Sangamankada is a surf spot located over an hour from Arugam Bay. It’s not very well-known and often gets skipped by many surfers. Access is a bit tricky, which adds to its low popularity. The area isn’t the most picturesque, scoring around 2 out of 10 for its overall environment. If you're looking for a spot that’s off the beaten path, this could be it, but keep your expectations in check.

The waves here can vary quite a bit depending on how the sand builds up along the shore and are heavily influenced by river flows. The best swell direction is from the SouthEast, but it can handle swells from the North and South as well. You might find some waves working best at around 1 ft (0.3 m). When conditions are right, you can expect right-breaking waves over sand, which is a good setup for beginners. The waves generally work best at low, mid, and high tides, so you’ve got some flexibility there. If the wind is coming from the SouthWest, it can improve your session, making for a smoother ride.

It's worth noting that Sangamankada and its neighbor Komari are not surfed often, primarily due to the difficult access and inconsistent wave quality. If you’re keen on checking it out, be ready for a less-than-polished surf experience compared to more popular spots. But for those looking for something different and don’t mind the adventure, it might just fit the bill.

Surf schools and rentals

Surf reports and surf forecasts nearby Sangamankada

Sangamankada
Eastern Province, Sri Lanka
Rivermouth break
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Komari
Eastern Province, Sri Lanka
Point break
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Pottuvil Point
Eastern Province, Sri Lanka
Point break
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Pottuvil Beach
Eastern Province, Sri Lanka
Point break
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
Main Beach - Arugam Bay
Eastern Province, Sri Lanka
Beach break
Tue 2
Wed 3
Thu 4
Fri 5
Sat 6
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.

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.

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

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