Pismo Beach Ocean / Surf Report

9/24/2021

SEA/SWELL:

    A 3- to 5-foot northwesterly (295-degree, deep-water)
    swell (with an 8- to 13-second period) is forecast along
    our coastline today through Saturday morning. This swell
    will remain at this level, but (with an 8- to 17-second
    period) on Saturday afternoon and night, increasing to
    4 to 6 feet (with an 8- to 15-second period) on Sunday.

    A 4- to 6-foot northwesterly (310-degree, deep-water) sea
    and swell (with a 5- to 13-second period) is forecast
    along our coastline on Monday.

    Gale-force northwesterly winds along the Northern and
    Central California coastline will produce an 8- to 10-foot
    northwesterly (310-degree, deep-water) sea and swell (with
    a 7- to 15-second period) along our coastline on Tuesday
    into Wednesday.

    A 3- to 5-foot northwesterly (295-degree, deep-water)
    swell (with an 8- to 11-second period) is forecast along
    our coastline next Thursday, Friday and Saturday.

  ATMOSPHERIC CONDITIONS

    Variable amounts of smoke and haze, mostly above 6,000 feet
    of altitude, will continue to stream over the Central Coast
    from the wildfires burning in the central and southern
    Sierra Nevada through Sunday.

    Gentle southerly to northwesterly (onshore) winds and
    mostly overcast skies along the beaches with pockets of
    night and morning fog and drizzle will continue through
    Sunday. Over this time frame, high temperatures along the
    shoreline will range from the high 50s to the mid-60s.

    Away from the ocean, the marine layer will clear from the
    the coastal valleys later this morning. Temperatures in the
    coastal valleys (San Luis Obispo) will range between the
    mid to high-70s. The inland valleys will warm to mid-90s
    with Paso Robles reaching 96 degrees. Overall, little
    change in this pattern is expected through Sunday.

    A Gulf of Alaska storm and associated cold front is
    forecast to produce mid to high-level clouds and increasing
    northwesterly winds starting on Monday and continuing through
    Wednesday. These northwesterly winds will peak on Tuesday
    at moderate gale-force to fresh gale-force (32 to 46 mph)
    levels. These winds will mix out the temperature inversion
    layer, leaving mostly clear skies behind.

    A warming trend is forecast to start October (next Friday)
    as high pressure builds into Central California and Santa
    Lucia (northeasterly) winds develop during night and
    morning. The long-range models are still not indicating
    any rain for the Central Coast.  

   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 the Coastline and Coastal Valleys and very high
    (R4) levels in the Inland Valleys, and the Far Inland
    areas today, Saturday and Sunday.

   DIABLO CANYON METEOROLOGICAL TOWER TEMPERATURE DATA:

         Yesterday's          Today's           Tomorrow's
         Min    Max         Min    Max         Min     Max
        53.9°   58.1°      54.1°   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
               
    (Thu)          Fri     Sat     Sun    Mon     Tue     Wed     Thu
   (52 101)       56 96   54 90   53 87  52 89   52 82   48 84   49 90     
        
   Coastal Valleys Temperatures, San Luis Obispo
 
    (Thu)          Fri     Sat     Sun    Mon     Tue     Wed     Thu
   (55 79)        56 77   56 76   56 74  56 75   56 77   53 76   54 81  
                    
   WINDS:

    Gentle to moderate (8 to 18 mph) southerly to northwesterly
    (onshore) winds are forecast today into Monday morning.

    Fresh to strong (19 to 31 mph) northwesterly winds are forecast
    along the coastline on Monday afternoon and night.

    Moderate gale-force to fresh gale-force (32 to 46 mph) northwesterly
    winds are forecast on Tuesday and Wednesday, decreasing next
    Thursday and Friday.

   DIABLO CANYON METEOROLOGICAL TOWER WIND DATA:

     Today's Maximum Winds:
 
        Max peak winds:         SE   15.0 mph @  5:30 a.m.
        Max sustained wind:     SE   10.0 mph @  5:30 a.m.

     Yesterday's Maximum Winds:       
        
        Max peak winds:         NW   20.0 mph @  4:30 p.m.
        Max sustained wind:     NW   16.0 mph @  4:30 p.m.

   SEAWATER TEMPERATURES:

     Seawater temperatures will range between 54 and 57 degrees through
     tonight, increasing to 56 to 59 degrees on Saturday through Monday.

     Seawater temperatures will decrease to 51 to 55 degrees on Tuesday
     through Thursday.

   OCEAN CURRENTS:

     Today's northerly (onshore) flowing current will continue to flow
     northward through Sunday.

     A strong southerly (offshore) flowing current is forecast on
     Monday through Thursday.

   SEAWATER VISIBILITY:

     Seawater visibility was 24 to 26 feet at the Diablo Canyon Marina.

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24-Hour Ocean Condition Outlook for Friday 09/24 to Saturday 09/25

  SWELL:            DIR. NW      HT.  4-6  PER.  7-13   This morning
  Decreasing to:    DIR. NW      HT.  3-5  PER.  8-13   This afternoon
  Remaining  at:    DIR. NW      HT.  3-5  PER.  8-12   Tonight

  WINDS:            DIR. SE      SPEED  5-10            This morning
  Increasing to:    DIR. NW      SPEED 10-15            This afternoon
  Decreasing to:    DIR. SE      SPEED  5-10            Tonight
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48-Hour Ocean Condition Outlook for Saturday 09/25 to Sunday 09/26

  SWELL:            DIR. NW      HT.  3-5  PER.  8-12   Saturday morning
  Remaining  at:    DIR. NW      HT.  3-5  PER.  8-17   Saturday afternoon
  Remaining  at:    DIR. NW      HT.  3-5  PER.  8-17   Saturday night

  WINDS:            DIR. SE      SPEED  5-10            Saturday morning
  Increasing to:    DIR. NW      SPEED 10-15            Saturday afternoon
  Decreasing to:    DIR. SE      SPEED  5-10            Saturday night
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 Extended Ocean Condition Outlook:

    Moderate gale-force to fresh gale-force (32 to 46 mph) northwesterly
    winds are forecast on Tuesday and Wednesday.

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