Ocean / Surf Report

Pismo Beach

Get our updated surf/ocean report and weather report with data provided by the Diablo Canyon Weather Report.

7/23/2017

SEA/SWELL:

   A 2- to 4-foot northwesterly (300-degree, deep-water)
   swell (with an 8- to 11-second period) is forecast on
   along our coastline today into Tuesday, decreasing to 
   2 to 3 feet with the same period on Wednesday into 
   next Sunday. 

   Arriving from south: 

   The Eastern Pacific region remains active with
   three tropical cyclones: Greg, Irwin and Hilary.

   Tropical Storm Hilary is forecast to become a major
   hurricane off the coast of Baja California and move
   in a northwesterly direction. Southeasterly (260-degree,
   deep-water) swell from this cyclone will arrive along
   the Southern California coastline on Friday and peak
   on Sunday at 7- to 9-feet (with a 14- to 16-second
   period) with sets of waves reaching well over 14
   feet.
   
   Along the Central Coast, this southerly swell will
   arrive on Friday at 1-foot (with a 15- to 17-second 
   period) building to 1 to 2 feet (with a 14- to 16-
   second period) on Saturday and peaking at 2 to 3 feet
   with the same period on Sunday.

  ATMOSPHERIC CONDITION:

   An upper-level trough of low pressure over
   Northern California will produce a persistent
   marine layer along the beaches and gentle to moderate
   (8 to 18 mph) westerly winds along the coast today 
   into Tuesday. Temperatures will cool Monday and will
   remain cooler than normal through Wednesday.

   Monsoonal moisture will move into Southern California
   and will promote thunderstorm development over the 
   Sierra Nevada, but isolated thunderstorms are also
   possible in the elevated terrain of eastern San Luis
   Obispo and Santa Barbara counties. Thunderstorm chances
   will continue into Tuesday. 

   Monday and Tuesday's temperatures will be in the 60s
   at the coast, mid 70s in the coastal valleys and mid-
   80s in the inland valleys.

   Temperatures will rise back to above normal levels by
   Thursday into the weekend with the inland valleys
   reaching triple-digits levels.

   Weather graphics and power outage information are available
   at: twitter.com/pge_john.

         Yesterday's          Today's           Tomorrow's
         Min    Max         Min    Max         Min     Max
        52.7°   55.6°      53.3°   59.0°      54.0°    59.0°       

    PG&E Weather Office in San Francisco predicted temperatures
    for San Luis Obispo County

    Inland Temperatures, Paso Robles 
 
      Actual                 Predicted
        
       Sat       Sun      Mon     Tue     Wed    Thu    Fri    Sat
      53 102    57 95    56 85   52 87   53 94  55 98  57 101 56 103     
                                       
    Coastal Valleys Temperatures, San Luis Obispo

       Sat       Sun      Mon     Tue     Wed    Thu    Fri    Sat
      52 78     54 79    55 76   54 75   54 77  55 80  55 82  56 83      
    
  WINDS:  

    Gentle to moderate (8 to 18 mph) westerly winds are forecast
    today into Tuesday.

    The afternoon northwesterly winds will increase on Wednesday
    into Friday to moderate to fresh (13 to 24 mph) levels,  
    decreasing during the night and morning hours on
    Wednesday into next Sunday. 

  DIABLO CANYON METEOROLOGICAL TOWER WIND DATA:

       Today's Maximum Winds:
    
        Max peak winds:       SW              7.1 mph @ 10:15 a.m.
        Max sustained wind:   SW              4.7 mph @ 10:15 a.m.

      Yesterday's Maximum Winds:
            
        Max peak winds:       NW             24.5 mph @ 12:00 p.m.
        Max sustained wind:   NW             17.7 mph @ 12:00 p.m.
 
  SEAWATER TEMPERATURES:

    Seawater temperatures will range between 51 and 54 degrees
    through Monday, increasing to 54 and 57 degrees on Tuesday
    into next Sunday.  

  OCEAN CURRENTS:

    Today's southerly (offshore) flowing current will continue
    into next Sunday.

  SEAWATER VISIBILITY:
 
    Seawater visibility was 18 to 20 feet at the Diablo Canyon Intake.

==========================================================================
 24-Hour Ocean Condition Outlook for Sunday 07/23 to Monday 07/24
    
  SWELL:            DIR. NW    HT.  2-4   PER.  8-11    This morning  
  Remaining  at:    DIR. NW    HT.  2-4   PER.  8-11    This afternoon
  Remaining  at:    DIR. NW    HT.  2-4   PER.  8-11    Tonight

  WINDS:            DIR. SW    SPEED  5-10              This morning
  Increasing to:    DIR. W     SPEED 10-15              This afternoon
  Decreasing to:    DIR. W     SPEED  5-10              Tonight
==========================================================================
 48-Hour Ocean Condition Outlook for Monday 07/24 to Tuesday 07/25
    
  SWELL:            DIR. NW    HT.  2-4   PER.  8-11    Monday morning  
  Remaining  at:    DIR. NW    HT.  2-4   PER.  8-11    Monday afternoon
  Remaining  at:    DIR. NW    HT.  2-4   PER.  8-11    Monday night

  WINDS:            DIR. SW    SPEED  5-10              Monday morning
  Increasing to:    DIR. W     SPEED 10-15              Monday afternoon
  Decreasing to:    DIR. W     SPEED  5-10              Monday night
===========================================================================

 Extended Ocean Condition Outlook: 

    The afternoon northwesterly winds will increase on Wednesday
    into Friday to moderate to fresh (13 to 24 mph) levels 
    decreasing during the night and morning hours on
    Wednesday into next Sunday. 

===========================================================================

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