Pismo Beach Ocean / Surf Report
11/20/2020
SEA/SWELL:
Today's 4- to 6-foot northwesterly (300-degree, deep-water)
swell (with an 8- to 15-second period) will remain at this
level through Sunday morning.
A 6- to 8-foot northwesterly (305-degree, deep-water) sea
and swell (with a 5- to 17-second period) is forecast along
our coastline on Sunday afternoon through Monday morning,
increasing to 7 to 9 feet (with 5- to 15-second period)
on Monday afternoon through Wednesday.
A 9- to 11-foot northwesterly (310-degree, deep-water) sea
and swell (with a 5- to 17-second period) is forecast along
our coastline on Thursday, decreasing to 6 to 8 feet next
Friday.
ATMOSPHERIC CONDITIONS:
Variable amounts of high-level clouds will continue to
steam form the southwest over the Central Coast through
Saturday morning, decreasing Saturday afternoon.
Fresh to strong (19 to 31 mph) and at times with gusts
to 50 mph Santa Lucia (northeasterly) winds are forecast
tonight through Saturday morning at Diablo Canyon.
These northeasterly winds could gust to 55 mph near the
Estero Bay area, especially along Highway 41 from Morro
Bay High School heading toward Atascadero about halfway
up the grade. Also the coastal canyons and parts of
eastern San Luis Obispo, including Cal Poly, San Luis
Obispo High School and French Medical Center during
the morning.
These winds will keep the marine low clouds out to
seas through Saturday with high temperatures ranging
between the high-60s and mid-70s throughout the Central
Coast.
An upper-level trough of low-pressure will move through
the Central Coast Sunday night into Monday. This system
will produce strong to gale-force (25 to 38 mph)
northwesterly winds and partly cloudy skies with areas
marine low clouds along the coastline, but rain is not
expected.
The Santa Lucia winds will return on Tuesday through
the Thanksgiving Day holiday and should produce mostly
clear conditions with cold mornings in the inland valleys
and mild afternoons throughout the Central Coast.
Initialized with multiple atmospheric and oceanic variables,
the ensemble packages that typically produce a broad range
of possible weather outcomes indicate dry conditions through
the end of November. However, they suggest a chance of rain
by the 1st week of December.
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
Inland Valleys, and medium (R2) to high (R3) levels
in the Far Inland Areas today.
The PG&E Fire Index Ratings will be at very high (R4)
levels along the Coastline and Coastal Valleys. The
Inland Valleys and Far Inland Areas will be at high
(R3) to medium (R2) levels on Saturday.
The PG&E Fire Index Ratings will be at very high (R4)
levels along the Coastline, Coastal and Inland Valleys.
The Far Inland Areas will be at high (R3) levels on
Sunday.
DIABLO CANYON METEOROLOGICAL TOWER TEMPERATURE DATA:
Yesterday's Today's Tomorrow's
Min Max Min Max Min Max
55.6° 62.5° 57.5° 66.4° 56.0° 67.0°
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 Fri
44 69 36 70 33 72 32 73 33 69 32 70 34 71 31 67 28 69
Coastal Valleys Temperatures, San Luis Obispo
Thu Fri Sat Sun Mon Tue Wed Thu Fri
48 72 49 73 45 77 42 75 42 71 42 73 41 70 38 67 37 70
WINDS:
Fresh to strong (19 to 31 mph) and at times with gusts
to 50 mph Santa Lucia (northeasterly) winds are forecast
tonight through Saturday morning.
A pattern of moderate to fresh (13 to 24 mph) Santa Lucia
(northeasterly) winds developing during the night and morning,
shifting out of the northwest during the afternoon will start
Saturday afternoon and will continue through Sunday morning.
Strong to gale-force (25 to 38 mph) northwesterly winds are
forecast Sunday afternoon through Monday.
The Santa Lucia winds will return on Tuesday through the
Thanksgiving Day holiday
DIABLO CANYON METEOROLOGICAL TOWER WIND DATA:
Today's Maximum Winds:
Max peak winds: NE 46.0 mph @ 1:00 a.m.
Max sustained wind: NE 24.0 mph @ 3:00 a.m.
Monday's Maximum Winds:
Max peak winds: NE 48.0 mph @ 11:15 p.m.
Max sustained wind: NE 26.0 mph @ 6:00 p.m.
SEAWATER TEMPERATURES:
Seawater temperatures will range between 52 and 55 degrees
through next Friday.
OCEAN CURRENTS:
A southerly (offshore) flowing current is expected to flow
southward through next Friday.
SEAWATER VISIBILITY:
Seawater visibility was 19 to 21 feet at the Diablo Canyon Marina.
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24-Hour Ocean Condition Outlook for Friday 11/20 to Saturday 11/21
SWELL: DIR. NW HT. 4-6 PER. 8-20 This morning
Remaining at: DIR. NW HT. 4-6 PER. 8-16 This afternoon
Remaining at: DIR. NW HT. 4-6 PER. 8-15 Tonight
WINDS: DIR. NE SPEED 20-25 + 45 This morning
Decreasing to: DIR. NW SPEED 10-15 This afternoon
Increasing to: DIR. NE SPEED 20-25 + 50 Tonight
==========================================================================
48-Hour Ocean Condition Outlook for Saturday 11/21 to Sunday 11/22
SWELL: DIR. NW HT. 4-6 PER. 8-15 Saturday morning
Remaining at: DIR. NW HT. 4-6 PER. 8-15 Saturday afternoon
Remaining at: DIR. NW HT. 4-6 PER. 8-14 Saturday night
WINDS: DIR. NE SPEED 20-25 + 50 Saturday morning
Decreasing to: DIR. NE SPEED 10-15 Saturday afternoon
Increasing to: DIR. NE SPEED 15-20 + 25 Saturday night
==========================================================================
Extended Ocean Condition Outlook:
Strong to gale-force (25 to 38 mph) northwesterly winds are forecast
Sunday afternoon through Monday.
==========================================================================
