EXPERIMENTAL SOUTH FLORIDA GULF STREAM AND WAVE FORECASTS


These forecasts are produced by WFO Miami using the Simulating WAves Nearshore (SWAN) wave model and the Real Time Ocean Forecast System Gulf Stream Forecasts. You may view more information about SWAN and output from other Southern Region coastal offices at the Southern Region SWAN page.

NEW: The SWAN has now been officially documented as experimental. Please read the Product Description Document and complete the survey for this product.

Note: The SWAN output is used as guidance to produce WFO Miami marine forecast. It is only experimental and it may differ from the official forecast. For the official marine forecast  graphics go to : WFO MIA Official Marine Forecast Graphics.

SWAN accounts for the following physics:

  • Wave propagation in time and space, shoaling, refraction due to current and depth, frequency shifting due to currents and non-stationary depth.
  • Wave generation by wind.
  • Three- and four-wave interactions.
  • Whitecapping, bottom friction and depth-induced breaking.
  • Dissipation.
  • Wave-induced set-up.
  • Propagation from laboratory up to global scales.
  • Transmission through and reflection (specular and diffuse) against obstacles.
  • Diffraction.

In here you will see 3-hourly forecast outputs for significant wave height, peak wave direction, peak wave period, and significant swell height (heights in feet and periods in seconds). Additionally, individual wave system heights, periods, and directions contributing to the significant wave heights are provided further below as well as 1 dimensional spectral plots for select points. In addition you will see the wind speed and direction used as input for the model. Our local version of SWAN also uses input from WAVEWATCH III for boundary conditions.

 NOTE: Significant Swell Height output from SWAN is the average height of the highest 1/3 of the group of waves with periods of 10 secs or longer.

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6 Panels | Significant Wave Heights and Peak Direction | Peak Period and Direction

Wave Systems Heights and Directions Contributing to Significant Wave Heights

Wave Systems Periods and Directions Contributing to Significant Wave Heights

Spectral Plots for the Following Locations: Buoy 41114, Jupiter, Gulf Stream, Deerfield Beach, and North Miami Beach

Gerlin Hanson Plots for*: Buoy 41114, Jupiter, Gulf Stream, Deerfield Beach, and North Miami Beach

*For an Explanation of the Garlin Hanson Plots See this: Document, Multimedia. Courtesy of Forecast Office in Eureka California.

SWAN Forecast Hour-12 SWAN Forecast Hour-15 SWAN Forecast Hour-18 SWAN Forecast Hour-21 SWAN Forecast Hour-24
12 Hour Forecast 15 Hour Forecast 18 Hour Forecast 21 Hour Forecast 24 Hour Forecast
SWAN Forecast Hour-27 SWAN Forecast Hour-30 SWAN Forecast Hour-33 SWAN Forecast Hour-36 SWAN Forecast Hour-39
27 Hour Forecast 30 Hour Forecast 33 Hour Forecast 36 Hour Forecast 39 Hour Forecast
SWAN Forecast Hour-42 SWAN Forecast Hour-45 SWAN Forecast Hour-48 SWAN Forecast Hour-51 SWAN Forecast Hour-54
42 Hour Forecast 45 Hour Forecast 48 Hour Forecast 51 Hour Forecast 54 Hour Forecast
SWAN Forecast Hour-57 SWAN Forecast Hour-60 SWAN Forecast Hour-63 SWAN Forecast Hour-66 SWAN Forecast Hour-69
57 hour Forecast 60 Hour Forecast 63 Hour Forecast 66 Hour Forecast 69 Hour Forecast

72 Hour Forecast 75 Hour Forecast 78 Hour Forecast 81 Hour Forecast 84 Hour Forecast
     
87 Hour Forecast 90 Hour Forecast      

 

SWAN SIGNIFICANT WAVE HEIGHT (FT)

THIS IS THE SWAN MODEL SIGNIFICANT WAVE HEIGHT OUTPUT BASED ON THE INPUT FORECAST SURFACE WINDS. SEAS ARE GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES. INDIVIDUAL WAVES MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.

12 Hour Forecast 15 Hour Forecast 18 Hour Forecast 21 Hour Forecast 24 Hour Forecast
27 Hour Forecast 30 Hour Forecast 33 Hour Forecast 36 Hour Forecast 39 Hour Forecast
42 Hour Forecast 45 Hour Forecast 48 Hour Forecast 51 Hour Forecast 54 Hour Forecast
57 Hour Forecast 60 Hour Forecast 63 Hour Forecast 66 Hour Forecast

69 Hour Forecast

72 Hour Forecast 75 Hour Forecast 78 Hour Forecast 81 Hour Forecast 84 Hour Forecast
     
87 Hour Forecast 90 Hour Forecast      

 

SWAN PEAK WAVE PERIOD (IN SECONDS) AND DIRECTION

  

12 Hour Forecast 15 Hour Forecast 18 Hour Forecast 21 Hour Forecast 24 Hour Forecast
27 Hour Forecast 30 Hour Forecast 33 Hour Forecast 36 Hour Forecast 39 Hour Forecast
42 Hour Forecast 45 Hour Forecast 48 Hour Forecast 51 Hour Forecast 54 Hour Forecast
57 Hour Forecast 60 Hour Forecast 63 Hour Forecast 66 Hour Forecast 69 Hour Forecast

72 Hour Forecast 75 Hour Forecast 78 Hour Forecast 81 Hour Forecast 84 Hour Forecast
     
87 Hour Forecast 90 Hour Forecast      

 

Wave Systems Heights and Directions Contributing to the Significant Wave Heights 

 

12 Hour Forecast 15 Hour Forecast 18 Hour Forecast 21 Hour Forecast 24 Hour Forecast
27 Hour Forecast 30 Hour Forecast 33 Hour Forecast 36 Hour Forecast 39 Hour Forecast
42 Hour Forecast 45 Hour Forecast 48 Hour Forecast 51 Hour Forecast 54 Hour Forecast
57 Hour Forecast 60 Hour Forecast 63 Hour Forecast 66 Hour Forecast 69 Hour Forecast
72 Hour Forecast 75 Hour Forecast 78 Hour Forecast 81 Hour Forecast 84 Hour Forecast
     
87 Hour Forecast 90 Hour Forecast      

 

Wave Systems Periods and Directions Contributing to the Significant Wave Heights 

 

12 Hour Forecast 15 Hour Forecast 18 Hour Forecast 21 Hour Forecast 24 Hour Forecast
27 Hour Forecast 30 Hour Forecast 33 Hour Forecast 36 Hour Forecast 39 Hour Forecast
42 Hour Forecast 45 Hour Forecast 48 Hour Forecast 51 Hour Forecast 54 Hour Forecast
57 Hour Forecast 60 Hour Forecast 63 Hour Forecast 66 Hour Forecast 69 Hour Forecast
72 Hour Forecast 75 Hour Forecast 78 Hour Forecast 81 Hour Forecast 84 Hour Forecast
     
87 Hour Forecast 90 Hour Forecast      

 

1-Dimensional Spectral Output for Buoy 41114 (Plots show lat/lon)

12 Hour Forecast 15 Hour Forecast 18 Hour Forecast 21 Hour Forecast 24 Hour Forecast
27 Hour Forecast 30 Hour Forecast 33 Hour Forecast 36 Hour Forecast 39 Hour Forecast
42 Hour Forecast 45 Hour Forecast 48 Hour Forecast 51 Hour Forecast 54 Hour Forecast
57 Hour Forecast 60 Hour Forecast 63 Hour Forecast 66 Hour Forecast 69 Hour Forecast

72 Hour Forecast 75 Hour Forecast 78 Hour Forecast 81 Hour Forecast 84 Hour Forecast
     
87 Hour Forecast 90 Hour Forecast      

1-Dimensional Spectral Output for Jupiter (Plots show lat/lon)

12 Hour Forecast 15 Hour Forecast 18 Hour Forecast 21 Hour Forecast 24 Hour Forecast
27 Hour Forecast 30 Hour Forecast 33 Hour Forecast 36 Hour Forecast 39 Hour Forecast
42 Hour Forecast 45 Hour Forecast 48 Hour Forecast 51 Hour Forecast 54 Hour Forecast
57 Hour Forecast 60 Hour Forecast 63 Hour Forecast 66 Hour Forecast 69 Hour Forecast

72 Hour Forecast 75 Hour Forecast 78 Hour Forecast 81 Hour Forecast 84 Hour Forecast
     
87 Hour Forecast 90 Hour Forecast      

1-Dimensional Spectral Output for Gulf Stream (Plots show lat/lon)

12 Hour Forecast 15 Hour Forecast 18 Hour Forecast 21 Hour Forecast 24 Hour Forecast
27 Hour Forecast 30 Hour Forecast 33 Hour Forecast 36 Hour Forecast 39 Hour Forecast
42 Hour Forecast 45 Hour Forecast 48 Hour Forecast 51 Hour Forecast 54 Hour Forecast
57 Hour Forecast 60 Hour Forecast 63 Hour Forecast 66 Hour Forecast 69 Hour Forecast

72 Hour Forecast 75 Hour Forecast 78 Hour Forecast 81 Hour Forecast 84 Hour Forecast
     
87 Hour Forecast 90 Hour Forecast      

1-Dimensional Spectral Output for Deerfield Beach (Plots show lat/lon)

12 Hour Forecast 15 Hour Forecast 18 Hour Forecast 21 Hour Forecast 24 Hour Forecast
27 Hour Forecast 30 Hour Forecast 33 Hour Forecast 36 Hour Forecast 39 Hour Forecast
42 Hour Forecast 45 Hour Forecast 48 Hour Forecast 51 Hour Forecast 54 Hour Forecast
57 Hour Forecast 60 Hour Forecast 63 Hour Forecast 66 Hour Forecast 69 Hour Forecast

72 Hour Forecast 75 Hour Forecast 78 Hour Forecast 81 Hour Forecast 84 Hour Forecast
     
87 Hour Forecast 90 Hour Forecast      

1-Dimensional Spectral Output for North Miami Beach (Plots show lat/lon)

12 Hour Forecast 15 Hour Forecast 18 Hour Forecast 21 Hour Forecast 24 Hour Forecast
27 Hour Forecast 30 Hour Forecast 33 Hour Forecast 36 Hour Forecast 39 Hour Forecast
42 Hour Forecast 45 Hour Forecast 48 Hour Forecast 51 Hour Forecast 54 Hour Forecast
57 Hour Forecast 60 Hour Forecast 63 Hour Forecast 66 Hour Forecast 69 Hour Forecast

72 Hour Forecast 75 Hour Forecast 78 Hour Forecast 81 Hour Forecast 84 Hour Forecast
     
87 Hour Forecast 90 Hour Forecast      

At the National Weather Service Office in Miami we strive to provide you with the best marine forecast possible in spite the absence of marine observations across our coastal waters, aside from an occasional ship report. Hence, your feedback and reports are of most importance to us. Your reports, comments and observations are greatly appreciated. The information you provide helps the National Weather Service provide better service to all our marine customers. You can contact our webmaster or send your comments to:

sr-mfl.marine@noaa.gov


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