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.
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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.
==========================================================================
