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
==========================================================================
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
==========================================================================
Extended Ocean Condition Outlook:
Moderate gale-force to fresh gale-force (32 to 46 mph) northwesterly
winds are forecast on Tuesday and Wednesday.
==========================================================================
