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               Thu 11/21                               Fri 11/22
CST 3hrly          03   06   09   12   15   18   21   00   03   06   09   12   15   18

Rip Current Risk High High High High High  Mod  Mod  Mod  Mod  Low  Low  Low  Low     
Surf Height (ft)    4    4    3    3    3    3    2    2    2    2    2    2    2    2
Dom Period (s)      8    8    7    7    7    7    7    7    7    7    7    7    7    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      Mclr  Clr  Clr  Clr  Clr Mclr Mclr Mclr Mclr Mclr Mclr Mclr  Clr  Clr
Temperature        68   67   70   72   74   72   71   69   68   68   71   74   75   73
Heat Index                                                                            
Wind (mph)        N10  N10  N10 NE10 NE10  NE8   E5   S2  NW2   N2  NE3   E6   E7   E7
Wind Gust                                                                             
Longshore         Mod  Mod  Mod  Mod  Mod None None None None Weak None None None None


Date                    Sat 11/23           Sun 11/24           Mon 11/25           Tue 11/26
CST 6hrly          00   06   12   18   00   06   12   18   00   06   12   18   00   06   12

Surf Height (ft)    2    2    2    2    3    3    3    3    3    3    3    2    2    2    2
Dom Period (s)      6    6    5    3    4    5    5    5    5    5    5    5    5    5    5
Chance Precip       0    0    0    0    0    0    0    0    0    0    0    0    0    5    5
TSTM Potential   None None None None None None None None None None None None None None None
Cloud Cover      Mclr Mclr Pcld Mclr Pcld Pcld Mclr Mclr Mclr Mclr Mclr Mclr Pcld Pcld Mclr
Temperature        71   71   76   76   75   75   80   79   78   77   80   79   77   76   79
Heat Index                                                                                 
Wind (mph)        SE7   S7  S13 SE13  S16  S17  S21  S17  S20  S17  S17 SE12  S10   S9 SE13
Wind Gust                              21             22   25   22             15          
Longshore        Weak Weak  Mod  ModStrngStrngStrngStrngStrngStrngStrng  Mod  Mod  Mod  Mod

South Padre Island City Beaches

Date               Thu 11/21                               Fri 11/22
CST 3hrly          03   06   09   12   15   18   21   00   03   06   09   12   15   18

Rip Current Risk High High High High High  Mod  Mod  Mod  Mod  Low  Low  Low  Low     
Surf Height (ft)    4    4    3    3    3    3    3    2    2    2    2    2    2    2
Dom Period (s)      8    8    7    7    7    7    7    7    7    7    7    7    7    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      Mclr  Clr  Clr  Clr  Clr Mclr Mclr Mclr Mclr Mclr Mclr Mclr  Clr  Clr
Temperature        70   69   70   72   73   72   71   71   70   70   72   74   74   73
Heat Index                                                                            
Wind (mph)        N14  N13 NE12 NE10 NE10  NE8   E6  SE2   N2  NE3  NE5  NE6   E7   E8
Wind Gust                                                                             
Longshore         Mod  Mod  Mod  Mod None None None None None Weak None None None None


Date                    Sat 11/23           Sun 11/24           Mon 11/25           Tue 11/26
CST 6hrly          00   06   12   18   00   06   12   18   00   06   12   18   00   06   12

Surf Height (ft)    2    2    2    2    3    3    3    3    4    4    3    3    2    2    2
Dom Period (s)      6    6    6    6    6    6    6    6    6    6    6    6    5    5    5
Chance Precip       0    0    0    0    0    0    0    0    0    0    0    0    0    5    5
TSTM Potential   None None None None None None None None None None None None None None None
Cloud Cover      Mclr Mclr Pcld Mclr Mclr Pcld Mclr Mclr Mclr Mclr Mclr Mclr Pcld Pcld Mclr
Temperature        72   72   76   76   76   76   79   79   79   78   80   79   78   77   79
Heat Index                                                                                 
Wind (mph)        SE9   S9 SE13 SE14  S18  S20  S21  S18  S22  S20  S17 SE14  S13  S10 SE13
Wind Gust                                             23             22                    
Longshore        Weak  Mod  Mod  ModStrngStrngStrngStrngStrngStrngStrng  Mod  Mod  Mod  Mod

South Padre Island County Beaches

Date               Thu 11/21                               Fri 11/22
CST 3hrly          03   06   09   12   15   18   21   00   03   06   09   12   15   18

Rip Current Risk High High High High High  Mod  Mod  Mod  Mod  Low  Low  Low  Low     
Surf Height (ft)    4    4    3    3    3    3    2    2    2    2    2    2    2    2
Dom Period (s)      8    8    7    7    7    7    7    7    7    7    7    7    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      Mclr  Clr  Clr  Clr  Clr Mclr Mclr Mclr Mclr Mclr Mclr Mclr  Clr  Clr
Temperature        69   68   70   72   73   72   71   70   69   69   72   74   74   73
Heat Index                                                                            
Wind (mph)        N13  N13 NE10 NE10  NE9  NE7   E5  SE2  NE2  NE3  NE3  NE5   E7   E8
Wind Gust                                                                             
Longshore         Mod  Mod Weak None None None None None None Weak None None None None


Date                    Sat 11/23           Sun 11/24           Mon 11/25           Tue 11/26
CST 6hrly          00   06   12   18   00   06   12   18   00   06   12   18   00   06   12

Surf Height (ft)    2    2    2    2    3    3    3    3    4    4    3    3    2    2    2
Dom Period (s)      6    6    6    5    5    5    5    5    5    5    5    6    5    5    5
Chance Precip       0    0    0    0    0    0    0    0    0    0    0    0    0    5    5
TSTM Potential   None None None None None None None None None None None None None None None
Cloud Cover      Mclr Mclr Mclr Mclr Mclr Pcld Mclr Mclr Mclr Mclr Mclr Mclr Mclr Pcld Mclr
Temperature        72   71   77   76   75   75   80   79   78   77   80   79   78   76   78
Heat Index                                                           84                    
Wind (mph)        SE8   S8 SE12 SE14  S17  S17  S20  S18  S21  S17  S16 SE14  S12  S10 SE12
Wind Gust                                                            21                    
Longshore        Weak  Mod  Mod  ModStrngStrngStrngStrngStrngStrngStrng  Mod  Mod  Mod  Mod

Willacy Island Beaches

Date               Thu 11/21                               Fri 11/22
CST 3hrly          03   06   09   12   15   18   21   00   03   06   09   12   15   18

Rip Current Risk High High High High High  Mod  Mod  Mod  Mod  Low  Low  Low  Low     
Surf Height (ft)    4    3    3    3    3    2    2    2    2    2    2    2    2    2
Dom Period (s)      7    7    7    7    7    7    7    7    7    7    7    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       Clr  Clr  Clr  Clr  Clr Mclr  Clr Mclr Mclr  Clr  Clr Mclr  Clr  Clr
Temperature        66   65   70   72   73   71   70   68   67   67   71   74   75   73
Heat Index                                                                            
Wind (mph)        N10 NE10  NE9 NE10  NE9  NE6   E3  SE2  NE2   N2  NE3  NE6   E7   E7
Wind Gust                                                                             
Longshore         Mod  Mod None None None None None None None Weak Weak None None None


Date                    Sat 11/23           Sun 11/24           Mon 11/25           Tue 11/26
CST 6hrly          00   06   12   18   00   06   12   18   00   06   12   18   00   06   12

Surf Height (ft)    2    1    2    2    2    3    3    3    3    3    3    2    2    2    2
Dom Period (s)      6    6    6    4    4    5    5    5    5    6    6    5    5    5    5
Chance Precip       0    0    0    0    0    0    0    0    0    0    0    0    0    5    5
TSTM Potential   None None None None None None None None None None None None None None None
Cloud Cover      Mclr Mclr Mclr Mclr Mclr Pcld Mclr Mclr Mclr Mclr Mclr Mclr Mclr Pcld Mclr
Temperature        70   69   77   76   74   73   80   79   76   75   81   78   76   74   79
Heat Index                                                           85                    
Wind (mph)        SE7   S7 SE10 SE14  S15  S15  S18  S16  S17  S15  S15 SE13   S9   S8 SE10
Wind Gust          12        15   20   21   20   24   23   24   20   20   18   14   13   15
Longshore        Weak Weak  Mod  Mod  ModStrngStrngStrngStrng  Mod  Mod  Mod  Mod  Mod  Mod

Kenedy Island Beaches

Date               Thu 11/21                               Fri 11/22
CST 3hrly          03   06   09   12   15   18   21   00   03   06   09   12   15   18

Rip Current Risk High High High High High  Mod  Mod  Mod  Mod  Low  Low  Low  Low     
Surf Height (ft)    4    3    3    3    3    2    2    2    2    2    2    2    2    2
Dom Period (s)      8    8    7    7    7    7    7    7    7    7    7    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       Clr  Clr  Clr  Clr  Clr  Clr  Clr Mclr Mclr  Clr  Clr Mclr  Clr  Clr
Temperature        64   62   67   70   72   70   69   67   65   65   68   73   74   72
Heat Index                                                                            
Wind (mph)        N12 NE10 NE10 NE10  NE9   E6   E2  SE2  NW2   N2   N3  NE5   E7   E7
Wind Gust               15                                                          12
Longshore         Mod  Mod Weak None None None None None None Weak Weak Weak None None


Date                    Sat 11/23           Sun 11/24           Mon 11/25           Tue 11/26
CST 6hrly          00   06   12   18   00   06   12   18   00   06   12   18   00   06   12

Surf Height (ft)    2    1    2    2    3    3    3    4    3    3    3    3    2    2    2
Dom Period (s)      6    6    6    6    5    6    6    6    6    6    6    5    6    5    5
Chance Precip       0    0    0    0    0    0    0    0    0    0    0    0    0    5    5
TSTM Potential   None None None None None None None None None None None None None None None
Cloud Cover      Mclr Mclr Mclr Mclr Mclr Mclr Mclr Mclr  Clr Mclr Mclr Mclr Mclr Pcld Pcld
Temperature        70   68   76   76   73   72   79   78   76   74   80   78   76   72   77
Heat Index                                                                                 
Wind (mph)        SE7   S7 SE10 SE15  S16  S15  S18  S18  S17  S14  S14 SE14  SE9  SE9  E12
Wind Gust          12        15   20   21   20   24   25   24        20   21   14          
Longshore        Weak Weak Weak  ModStrngStrngStrngStrngStrng  Mod  Mod  Mod  Mod Weak None

Surf Matrices

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

* EXPERIMENTAL - NOT FOR OPERATIONAL USE *