Surf Matrices

* EXPERIMENTAL - NOT FOR OPERATIONAL USE *

Experimental Surf Forecast Matrix

In the tabs below you can view Surf Forecast Matrices for various beaches over the NWS Brownsville/Rio Grande Valley forecast area. This product is experimental and not intended to be substituted for the official Surf Zone Forecast, which can be viewed HERE. Additional information on this project and variable definitions can be found HERE. We are seeking feedback on this over the next several months, so please send us your input via an online survey.

Boca Chica Beach

Date               Sat 12/21                               Sun 12/22
CST 3hrly          03   06   09   12   15   18   21   00   03   06   09   12   15   18

Rip Current Risk  Mod  Mod  Mod  Mod  Mod  Low  Low  Low  Low  Low  Low  Low  Low     
Surf Height (ft)    3    3    2    2    2    2    2    2    2    2    2    2    2    2
Dom Period (s)      6    6    6    6    6    6    6    6    6    6    6    6    6    6
Chance Precip       0    0    0    0    0    0    0    0    0    0    0   10   10    0
TSTM Potential   None None None None None None None None None None None None None None
Cloud Cover      Mclr Pcld Mclr Pcld Pcld Pcld Pcld Pcld Pcld Pcld Pcld Mcld Mcld Pcld
Temperature        67   67   69   71   71   69   69   68   68   68   69   71   71   71
Heat Index                                                                            
Wind (mph)       NE10  NE9  NE9 NE10 NE12  E10   E9   E9   E9   E9  E12  E14 SE14 SE12
Wind Gust                                        14             14                    
Longshore        None None None None None None None None None None None None None None


Date                    Mon 12/23           Tue 12/24           Wed 12/25           Thu 12/26
CST 6hrly          00   06   12   18   00   06   12   18   00   06   12   18   00   06   12

Surf Height (ft)    3    3    3    3    2    2    2    2    2    2    2    2    2    2    3
Dom Period (s)      6    5    6    6    5    5    5    6    6    6    6    5    6    7    6
Chance Precip       0    0    5    5    5    5   10   10   20   10    5    0    0    5    5
TSTM Potential   None None None None None None None None None None None None None None None
Cloud Cover      Mcld Pcld Pcld Mclr Pcld Pcld Mclr Mclr Pcld Pcld Pcld Mclr Pcld Pcld Pcld
Temperature        70   70   74   73   72   70   74   73   72   69   72   72   71   71   75
Heat Index                                                                                 
Wind (mph)       SE13 SE12 SE15 SE13 SE13  S10  S14 SE10   S9  SW8  S10  SE9  S12  S10  S15
Wind Gust                                   15        16   14                       16     
Longshore         Mod  Mod  Mod  Mod  Mod  Mod  Mod  Mod  Mod Weak  Mod None  Mod  Mod  Mod

South Padre Island City Beaches

Date               Sat 12/21                               Sun 12/22
CST 3hrly          03   06   09   12   15   18   21   00   03   06   09   12   15   18

Rip Current Risk  Mod  Mod  Mod  Mod  Mod  Low  Low  Low  Low  Low  Low  Low  Low     
Surf Height (ft)    3    3    3    2    2    3    3    3    3    3    3    3    3    3
Dom Period (s)      6    6    6    6    6    6    6    6    6    6    6    6    6    6
Chance Precip       0    0    0    0    0    0    0    0    0    0    0   10   10    0
TSTM Potential   None None None None None None None None None None None None None None
Cloud Cover      Mclr Pcld Mclr Pcld Pcld Pcld Pcld Pcld Pcld Pcld Pcld Mcld Mcld Pcld
Temperature        69   67   69   70   70   69   69   69   68   68   69   70   71   71
Heat Index                                                                            
Wind (mph)       NE13 NE12 NE10 NE10 NE12  E12  E12  E10  E12  E12  E13  E14 SE14 SE14
Wind Gust                                                                             
Longshore        None None None None None None None None None None None None None None


Date                    Mon 12/23           Tue 12/24           Wed 12/25           Thu 12/26
CST 6hrly          00   06   12   18   00   06   12   18   00   06   12   18   00   06   12

Surf Height (ft)    3    3    3    3    3    3    3    3    2    2    2    2    3    3    3
Dom Period (s)      6    6    6    6    6    6    6    6    6    6    6    6    7    7    7
Chance Precip       0    0    5    5    5    5   10   20   20   10    5    0    0    5    5
TSTM Potential   None None None None None None None None None None None None None None None
Cloud Cover      Mcld Pcld Pcld Mclr Mclr Pcld Mclr Mclr Pcld Pcld Pcld Mclr Pcld Pcld Pcld
Temperature        71   71   72   73   72   71   73   73   72   69   71   71   72   72   74
Heat Index                                                                                 
Wind (mph)       SE14 SE14 SE15 SE14 SE15  S13  S14 SE13  S10 SW10  S10 SE10 SE13  S13  S14
Wind Gust                                                                                  
Longshore         Mod  Mod  Mod  Mod  Mod  Mod  Mod  Mod  Mod  Mod Weak None  Mod  Mod  Mod

South Padre Island County Beaches

Date               Sat 12/21                               Sun 12/22
CST 3hrly          03   06   09   12   15   18   21   00   03   06   09   12   15   18

Rip Current Risk  Mod  Mod  Mod  Mod  Mod  Low  Low  Low  Low  Low  Low  Low  Low     
Surf Height (ft)    3    3    2    2    2    2    2    2    2    2    2    2    2    2
Dom Period (s)      6    6    6    6    6    6    6    6    6    6    6    6    6    6
Chance Precip       0    0    0    0    0    0    0    0    0    0    0    5    5    0
TSTM Potential   None None None None None None None None None None None None None None
Cloud Cover      Mclr Pcld Pcld Pcld Pcld Pcld Mclr Mclr Pcld Pcld Pcld Mcld Mcld Pcld
Temperature        67   66   68   70   70   68   69   68   67   67   69   70   71   71
Heat Index                                                                            
Wind (mph)       NE10 NE10 NE10 NE10 NE10  E10  E10  E10  E10  E12  E12 SE13 SE14 SE13
Wind Gust                                                                             
Longshore        None None None None None None None None None None None None None None


Date                    Mon 12/23           Tue 12/24           Wed 12/25           Thu 12/26
CST 6hrly          00   06   12   18   00   06   12   18   00   06   12   18   00   06   12

Surf Height (ft)    3    3    3    3    3    3    2    2    2    2    2    2    2    3    3
Dom Period (s)      6    6    6    6    6    6    6    6    6    6    6    6    7    7    6
Chance Precip       0    0    5    5    5    5    5   20   20   10    5    0    0    5    5
TSTM Potential   None None None None None None None None None None None None None None None
Cloud Cover      Mcld Pcld Pcld Mclr Mclr Pcld Mclr Mclr Pcld Pcld Pcld Mclr Pcld Pcld Pcld
Temperature        70   70   72   72   71   70   73   73   71   68   71   71   71   71   74
Heat Index                                                                                 
Wind (mph)       SE13 SE13 SE14 SE14  S14  S12  S14 SE12  S10  SW9   E9 SE10 SE12  S12  S13
Wind Gust                                                                                  
Longshore         Mod  Mod  Mod  Mod  Mod  Mod  Mod  Mod  Mod Weak Weak None  Mod  Mod  Mod

Willacy Island Beaches

Date               Sat 12/21                               Sun 12/22
CST 3hrly          03   06   09   12   15   18   21   00   03   06   09   12   15   18

Rip Current Risk  Mod  Mod  Mod  Mod  Mod  Low  Low  Low  Low  Low  Low  Low  Low     
Surf Height (ft)    3    3    2    2    2    2    2    2    2    2    2    2    2    2
Dom Period (s)      6    6    6    6    6    6    6    6    6    6    6    6    6    6
Chance Precip       0    0    0    0    0    0    0    0    0    0    0    5    5    0
TSTM Potential   None None None None None None None None None None None None None None
Cloud Cover      Mclr Pcld Pcld Pcld Pcld Pcld Mclr Mclr Pcld Pcld Pcld Mcld Pcld Pcld
Temperature        65   64   68   70   70   68   67   66   65   66   69   71   72   70
Heat Index                                                                            
Wind (mph)        NE9  NE9  NE9 NE10 NE10  E10   E9   E9   E9   E9  E10 SE12 SE13 SE10
Wind Gust                                        14                                 15
Longshore        None None None None None None None None None None None None Weak  Mod


Date                    Mon 12/23           Tue 12/24           Wed 12/25           Thu 12/26
CST 6hrly          00   06   12   18   00   06   12   18   00   06   12   18   00   06   12

Surf Height (ft)    2    2    2    2    2    2    2    2    2    2    2    2    2    2    2
Dom Period (s)      6    5    6    6    6    6    6    6    6    6    6    6    7    7    7
Chance Precip       0    0    5    5    5    5    5   20   20   10    5    0    0    5   10
TSTM Potential   None None None None None None None None None None None None None None None
Cloud Cover      Pcld Pcld Pcld Mclr Mclr Mclr Mclr Mclr Mclr Pcld Pcld Mclr Pcld Pcld Pcld
Temperature        69   68   73   72   70   68   74   73   70   67   71   71   69   69   75
Heat Index                                                                                 
Wind (mph)       SE12  S10 SE14 SE13  S12  S10  S13 SE12   S9  SW7   E8  SE9 SE10  S10  S12
Wind Gust               15   20   18   17   15             14             15   16   15   17
Longshore         Mod  Mod  Mod  Mod  Mod  Mod  Mod  Mod  Mod None None None  Mod  Mod  Mod

Kenedy Island Beaches

Date               Sat 12/21                               Sun 12/22
CST 3hrly          03   06   09   12   15   18   21   00   03   06   09   12   15   18

Rip Current Risk  Mod  Mod  Mod  Mod  Mod  Low  Low  Low  Low  Low  Low  Low  Low     
Surf Height (ft)    3    2    2    2    2    2    2    2    2    2    2    2    2    2
Dom Period (s)      6    6    6    6    6    6    6    6    6    6    6    6    6    6
Chance Precip       0    0    0    0    0    0    0    0    0    0    0    0    0    0
TSTM Potential   None None None None None None None None None None None None None None
Cloud Cover      Pcld Pcld Pcld Pcld Pcld Pcld Mclr Mclr Pcld Pcld Pcld Pcld Pcld Pcld
Temperature        63   62   65   68   68   67   66   65   64   65   67   70   70   69
Heat Index                                                                            
Wind (mph)        NE9 NE10 NE10 NE10 NE12  E10  E10   E9   E9   E9   E9 SE12 SE13 SE10
Wind Gust                                   15                                      15
Longshore        None None None None None None None None None None None None None None


Date                    Mon 12/23           Tue 12/24           Wed 12/25           Thu 12/26
CST 6hrly          00   06   12   18   00   06   12   18   00   06   12   18   00   06   12

Surf Height (ft)    2    2    3    3    3    3    2    2    2    2    2    2    2    2    2
Dom Period (s)      5    6    6    6    6    6    6    6    6    6    6    6    7    7    7
Chance Precip       0    0    5    5    5    5    5   20   20   10    5    0    0    5   10
TSTM Potential   None None None None None None None None None None None None None None None
Cloud Cover      Pcld Pcld Pcld Mclr Mclr Mclr Pcld Mclr Pcld Pcld Pcld Mclr Pcld Pcld Pcld
Temperature        68   67   72   71   69   67   73   72   69   65   70   70   68   68   73
Heat Index                                                                                 
Wind (mph)       SE12  S10  S14 SE14  S13  S10  S13 SE13   S9   W7   E8  E10 SE10 SE10  S12
Wind Gust               15   20   20                       14        13   16   16        17
Longshore         Mod  Mod  Mod  Mod  Mod  Mod  Mod  Mod  Mod None Weak None  Mod  Mod  Mod

Surf Matrices

*** EXPERIMENTAL - NOT FOR OPERATIONAL USE ***

* EXPERIMENTAL - NOT FOR OPERATIONAL USE *