Pismo Beach Ocean / Surf Report

5/27/2021

SEA/SWELL:

    Strong to gale-force (25 to 38 mph) northwesterly winds will
    generate a 4- to 6-foot northwesterly (310-degree, deep-water)
    sea and swell (with a 5- to 9-second period) through Friday,
    increasing to 5 to 7 feet with the same period on Saturday
    into Sunday.

    A 3- to 5-foot northwesterly (290-degree, deep-water) swell
    (with an 8- to 11-second period) is forecast along our
    coastline on Memorial Day through next Friday.  

    Arriving from the Southern Hemisphere:

    A 1- to 2-foot Southern Hemisphere (190-degree, deep-water)
    swell (with an 18- to 20-second period) will arrive along
    our coastline on Wednesday, increasing to 2 to 4 feet (with
    a 16- to 18-second period) next Thursday and Friday.

  ATMOSPHERIC CONDITIONS:

    A pattern of night and morning marine low clouds with areas
    of fog and mist, followed by strong to gale-force (25 to 38
    mph) northwesterly winds and clear skies during the afternoon
    will continue through Saturday.

    The northwesterly winds will decrease to fresh to strong (19
    to 31 mph) levels on Sunday and the marine layer will become
    more persistent along the coastline.

    Over this period, high-temperatures will range between the
    high-80s in the inland valleys (Paso Robles) and low-70s in
    the coastal valleys (San Luis Obispo). The beaches will
    range between the mid-50 to the low-60s.

    An upper-level trough of low pressure will develop along the
    coastline, while a strong upper-level ridge of high pressure
    builds over eastern California and Nevada on Monday through
    next Friday. This condition will produce gentle to moderate
    (8 to 18 mph) southerly winds along the coastline, a persistent
    marine layer with areas of night and morning drizzle and
    warmer temperatures away from the beaches.  

    The high-temperatures will increase to the low-90s in the
    inland valleys and mid-70s in the coastal valleys. The beaches
    will range between the high-50 to the low-60s. Farther
    inland, temperatures are anticipated to reach between
    104-107 degrees across the Central Valley.

   WILDFIRE INDEX RATINGS:
 
    COASTAL: FIA 508
    INLAND:  FIA 497, 510, 575, 580, 582 and 590

    The PG&E Fire Index Ratings will be at high (R3) levels
    along our Coastline, Coastal and Inland Valleys and the
    Far Inland areas today.

    The PG&E Fire Index Ratings will be at medium (R2) levels
    along our Coastline and Coastal Valleys, while the Inland
    Valleys and the Far Inland areas will be at high (R3) levels
    on Friday and Saturday.

   DIABLO CANYON METEOROLOGICAL TOWER TEMPERATURE DATA:
 
         Yesterday's          Today's           Tomorrow's
         Min    Max         Min    Max         Min     Max
        48.9°   53.9°      48.3°   57.0°      49.0°    57.0°
 
   PG&E Weather Office in San Francisco predicted temperatures
   for San Luis Obispo County
 
    Inland Temperatures, Paso Robles
 
    Actual                       Predicted
              
        Wed    Thu    Fri    Sat    Sun    Mon    Tue    Wed    Thu
       47 91  47 88  50 87  47 87  47 88  52 91  53 93  53 91  52 87  
        
   Coastal Valleys Temperatures, San Luis Obispo
 
        Wed    Thu    Fri    Sat    Sun    Mon    Tue    Wed    Thu    
       47 69  51 71  51 71  49 70  49 71  50 75  52 76  52 73  52 71
                    
   WINDS:

    A pattern of strong to gale-force (25 to 38 mph) northwesterly
    winds developing during the afternoon, decreasing during
    night and morning will continue through Saturday, decreasing to
    fresh to strong (19 to 31 mph) levels on Sunday.

    Gentle to moderate (8 to 18 mph) southerly winds are forecast
    on Monday through next Friday.

   DIABLO CANYON METEOROLOGICAL TOWER WIND DATA:
 
     Today's Maximum Winds:
 
        Max peak winds:         NW   16.0 mph @  8:30 a.m.
        Max sustained wind:     NW   13.0 mph @  8:30 a.m.
 
     Yesterday's Maximum Winds:       
        
        Max peak winds:         NW   36.0 mph @  2:30 p.m.
        Max sustained wind:     NW   28.0 mph @  1:45 p.m.
 
   SEAWATER TEMPERATURES:

     Seawater temperatures will range between 50 and 53 degrees
     through Sunday. Seawater temperatures will warm up on
     Monday through next Friday.  
    
   OCEAN CURRENTS:

     A southerly (offshore) flowing current will continue to flow
     southward through Sunday, becoming a northerly (onshore) flowing
     current on Monday through next Friday.

   SEAWATER VISIBILITY:
 
     Seawater visibility was 32 feet (top to bottom) at the
     Diablo Canyon Marina.

==========================================================================
24-Hour Ocean Condition Outlook for Thursday 05/27 to Friday 05/28

  SEA/SWELL:        DIR. NW      HT.  4-6  PER.  5-9    This morning
  Remaining  at:    DIR. NW      HT.  4-6  PER.  5-9    This afternoon
  Remaining  at:    DIR. NW      HT.  4-6  PER.  5-9     Tonight

  WINDS:            DIR. NW      SPEED 15-20 + 25       This morning
  Increasing to:    DIR. NW      SPEED 20-30 + 40       This afternoon
  Decreasing to:    DIR. NW      SPEED 15-20            Tonight
==========================================================================
48-Hour Ocean Condition Outlook for Friday 05/28 to Saturday 05/29

  SEA/SWELL:        DIR. NW      HT.  4-6  PER.  5-9    Friday morning
  Remaining  at:    DIR. NW      HT.  4-6  PER.  5-9    Friday afternoon
  Remaining  at:    DIR. NW      HT.  4-6  PER.  5-9    Friday night

  WINDS:            DIR. NW      SPEED 15-20 + 25       Friday morning
  Increasing to:    DIR. NW      SPEED 20-30 + 40       Friday afternoon
  Decreasing to:    DIR. NW      SPEED 15-20            Friday night
==========================================================================
 
 Extended Ocean Condition Outlook:

   Gentle to moderate (8 to 18 mph) southerly winds are forecast
   on Monday through next Friday.

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