Russian Rivermouth
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Timezone: America/Los_Angeles

Russian Rivermouth surf guide

Russian Rivermouth is a surf spot that can be a bit tricky to predict. Itโ€™s located right off Highway 1, making it easy to spot and access. The break here is mostly known for its righthand barrels, but there are decent lefts too when the conditions align. The spot is heavily influenced by the flow of the river and the shape of the sandbar, which can change frequently. Typically, it's best during the summer and autumn months.

When the conditions are good, Russian Rivermouth can produce waves that range from waist high (about 1 meter) to overhead (up to 2.4 meters). It handles swells from the south and north, with the best action coming from small, clean swells from the west or southwest. Ideal waves often break over sand, creating a rivermouth setup that can be both shallow and exciting. You'll want to paddle out when the tide is low to mid, with light east or northeast winds for the best experience. This spot really suits intermediate to expert surfers who are comfortable with its fickle nature.

Access to Russian Rivermouth is straightforward; just turn west off Highway 1 and follow the road to the end. Youโ€™ll find yourself right at the mouth, ready to charge. The crowd can vary; some days you might have it to yourself, while other times a few locals might share the lineup. The vibe can be a bit standoffish at first, but striking up a conversation usually helps break the ice. Just keep in mind that there are sharks around, so stay aware while you're out there.

Surf reports and surf forecasts nearby Russian Rivermouth

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Russian Rivermouth
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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 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.

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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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