How To Read a Surf Forecast
If you’re here, you’ve probably used (or at least heard of) some of the classic surf forecast websites, apps, or buoy trackers. Tools like Windy, MagicSeaweed (RIP), Surfline, Windguru, and others all play a part in helping surfers figure out when and where to paddle out. And these days, the amount of real-time data available to us is bigger and better than ever.
But no matter where you are in the world — whether you’re eyeing a slab in Western Oz or waiting for a refraction swell to sneak into a South Florida sandbar — forecasting waves all comes down to the same basic chain reaction:
Wind creates waves. Waves become swell. Swell reaches a coastline. Swell breaks (or doesn’t) based on local conditions.
This guide breaks down how to actually read a surf forecast, not just glance at star ratings or swell sizes. Whether you’re a South Florida local or a traveling surfer trying to score, understanding how to interpret the raw data can turn frustration into froth.
Forecasting 101: The Big Picture
Before diving into the tools, it’s worth remembering this hierarchy:
-Storms make wind
-Wind makes waves
-Waves become swell
-Swell travels across the ocean
-Local bathymetry + wind + tide determine how it breaks
The goal of surf forecasting is to trace that swell’s journey — from storm to shore — and then decide if it’s worth paddling out. More importantly, honing in your forecasting skills will allow you to plan-ahead as much as possible.
Let’s break this down by timeline and tools:
1. Start Local: The 7-Day Weather Forecast
If tracking a swell in the near term, checking out your local (or the surf break’s) weather conditions is a good place to start. We are looking for chances of severe weather, wind conditions, sun & clouds, timing of any drastic pattern changes, etc.
For the Local Weather Forecast I use the National Weather Service and windy.com
National Weather Service Marine Forecast:
This is a critical resource if available for your forecast area. All US territorial waters have a NWS Marine Forecast available.
For boaters and surfers. It gives:
-Nearshore wind and wave height
-Swell period and direction
-Advisory-level winds or storms
For South Florida waters, anytime you see the NWS reporting swell periods 7 or more seconds, this is usually a promising sign depending on the specific setup.
- Key details: swell height, period (seconds), and direction.
- Example: 6ft @ 12 seconds from the NE means very different surf than 6ft @ 6 seconds from the NE.
2. Check the Swell Models
Once you have taken a look at local weather, wind, and marine forecasts, its time to dig into the specifics of the swell.
We are now tracking what storms or patterns are generating swell, where that swell is going, and some idea of the swell’s specifics (height, period)
The two most useful and widely used swell models are the American “GFS “ model and & ECMWF or EURO, as it’s known.
These models provide guidance for Swell height, period, and direction, arrival times, and Multi-swell interactions (important for overlapping swells)
Example: A storm off Hatteras pushing 6ft at 10s from 45° NE might make it into Palm Beach County — but will it wrap into Broward? That’s where local knowledge matters.
3. Visualization Tools: Windy.com
Windy has quickly become a go-to resource for people around the world for weather forecasting. For our purposes, we’ll use Windy as a visual tool to identify:
-Active fetches (areas with strong, sustained winds over water)
-Offshore vs onshore conditions
-Timing of wind shifts
Be sure to poke around different models across Windy to see various operational runs as models can vary greatly at times
4. Check Real-Time Data: Buoys & Tide Charts
Reading available buoy’s on a swell’s approach/arrival is absolutley KEY to determining whether to paddle out and where to paddling out. As DaBuh once said “if it don’t show up on da buoy, it won’t show up on da beach”
The National Data Buoy Center or NDBC is the best resource for buoy readings across US waters
For Florida, monitor buoys like 41009 (Canaveral), 41114 (Fort Pierce), 41122 (Hollywood) and LKWF1 (Lake Worth).
Watch for rising swell height and period and pay close attention to the direction of the swell
True N swell vs NE vs ESE can mean totally different surf in South Florida.
Tide Charts:
Being aware of tides for day(s) of surf is obviously key. Spots in Florida can be extremely tide sensitive. This is especially important for reef and inlet influenced spots ie: Reef Road, Boca Inlet
Low tide might mean a fast-breaking wave, while high tide can swamp out the spot.
5. Know Your Breaks & Geography
At the end of the day, nothing beats local knowledge and familiarity with a specific surf break. The East Coast, Florida included, is known for its shifting sand and unique swells (or lack there of) that leave seasoned locals scratching their heads. Part of the fun is always checking different spots, or if you did your homework and get a little lucky, scoring the first spot you pull up on.
The truth about South Florida is it could appear flat a mile up the beach and going off around the corner.
6. Blend Forecasting with Observation
Models give you predictions; cams and your own eyes give you confirmation.
Final Checklist Before You Paddle Out
Check the local wind (Is it offshore or a mess?)
Look at the buoy readings (Is swell actually showing?)
Consider the tide (Is your spot tide-sensitive?)
Watch the cams (What are they really doing?)
Trust your gut (sometimes the best sessions are the unexpected ones)
7. Check The Cams
Our goal is to provide you with the most accurate and localized surf report in South Florida. Hopefully, giving you a heads up so you a plan appropriately and score surf as often as possible. We appreciate your support and will do our best to provide the most useful forecast possible.
Want More? We are working on:
- A surf forecast glossary (what the hell is “fetch,” anyway?)
- Advanced Forecasting (Part 2)
- Regional cheat sheets (ie: “When a specific Cam or buoy shows this..then this spot is likely on…”
Let us know what you’d like to see next — and don’t forget: Why wonder when you can Check?
