Pismo Beach Ocean / Surf Report
1/21/2020
SEA/SWELL:
A 7- to 9-foot northwesterly (295-degree, deep-water)
swell (with an 8- to 17-second period) will arrive along
our coastline today, building to 8 to 10 feet (with
an 8- to 15-second period) on Wednesday.
A 4- to 6-foot northwesterly (300-degree, deep-water) sea
and swell is expected along our coastline on Thursday into
Friday morning.
An 8- to 10-foot west-northwesterly (285-degree, deep-water)
swell (with an 18- to 20-second period) will arrive along
our coastline on Friday afternoon and will remain at this
height but (with a 15- to 17-second period) on Saturday,
decreasing to 5 to 7 feet by Sunday morning.
A 7- to 9-foot northwesterly (295-degree, deep-water)
swell (with a 15- to 22-second period) is expected Sunday
afternoon, building to 9 to 11 feet (with a 13- to 17-
second period) on Monday and Tuesday. A higher-energy
west-northwesterly swell is forecast to arrive along our
coastline on January 30 and 31.
ATMOSPHERIC CONDITIONS:
Gentle to moderate (8 to 18 mph) variable winds and partly
cloudy skies are forecast today. Today's high temperatures
will range between the low to mid-60s.
A weak cold front will produce gentle to moderate
(8 to 18 mph) southerly winds, increasing clouds and
light rain showers as far south as Pismo Beach tonight
into Wednesday late morning. Moderate to fresh (13 to 24
mph) northwesterly winds and partly cloudy skies are
forecast on Wednesday afternoon and night. Snow levels
across the Sierra Nevada will range from 4,500 and
6,500 feet North to South.
High pressure will build over the California on Thursday
through Friday morning. This condition will produce
moderate to fresh (13 to 24 mph with gust to 40 mph)
Santa Lucia (northeasterly) winds and mostly sunny skies.
High temperatures in the coastal valleys will increase
to the low 70s on Thursday and Friday.
Moderate to fresh (13 to 24 mph) northwesterly (onshore)
winds on Friday afternoon into Saturday will allow the
marine layer to develop along beaches and coastal valleys
on Friday night onto Saturday.
A cold front will bring moderate to fresh (13 to 24 mph)
southerly winds, increasing clouds and rain on Sunday
morning and afternoon. This system may tap some sub-tropical
moisture which will produce higher snow levels and mild
temperatures. At this time, between one tenth to a half
of an inch of rain expected. The cold front will be
followed by strong to gale-force (25 to 38 mph)
northwesterly winds and partly clouds skies.
The long-range models and charts indicate dry weather
starting Monday and continuing through the first week
of February.
WILDFIRE INDEX RATINGS:
The PG&E Fire Index Ratings will be at medium (R2) levels
along the Coastline, Coastal and Inland Valleys and Far
Inland Areas, expect for 575 and 582 which will be at
low (R1) levels today and Wednesday.
DIABLO CANYON METEOROLOGICAL TOWER TEMPERATURE DATA:
Yesterday's Today's Tomorrow's
Min Max Min Max Min Max
54.4° 58.8° 52.6° 60.0° 50.0° 59.0°
PG&E Weather Office in San Francisco predicted temperatures
for San Luis Obispo County
Inland Temperatures, Paso Robles
Actual Predicted
Mon Tue Wed Thu Fri Sat Sun Mon Tue
42 55 45 58 44 63 44 64 42 65 40 66 43 63 40 64 41 65
Coastal Valleys Temperatures, San Luis Obispo
Mon Tue Wed Thu Fri Sat Sun Mon Tue
46 59 48 60 46 66 50 72 49 68 47 67 46 67 47 66 49 69
WINDS:
Gentle to moderate (8 to 18 mph) variable winds are forecast
today into Wednesday morning, shifting out of the northwest
and increasing to Moderate to fresh (13 to 24 mph) levels
on Wednesday.
Moderate to fresh (13 to 24 mph) Santa Lucia (northeasterly)
winds are forecast on Wednesday night through Friday morning.
Moderate to fresh (13 to 24 mph) northwesterly (onshore)
winds are forecast on Friday afternoon into Saturday,
followed by southerly winds on Sunday.
DIABLO CANYON METEOROLOGICAL TOWER WIND DATA:
Last night's Maximum Winds:
Max peak winds: SE 8.0 mph @ 5:30 a.m.
Max sustained wind: SE 5.0 mph @ 5:30 a.m.
Yesterday's Maximum Winds:
Max peak winds: SE 19.0 mph @ 8:30 a.m.
Max sustained wind: SE 9.0 mph @ 8:30 a.m.
SEAWATER TEMPERATURES:
Intake seawater temperatures will range from 54 and 57 degrees
through Friday.
OCEAN CURRENTS:
A northerly (onshore) flowing current will continue to flow
northward through Wednesday.
A southerly (offshore) flowing current is forecast on Thursday
through Saturday.
SEAWATER VISIBILITY:
Seawater visibility was 3 to 5 feet at the Diablo Canyon Marina.
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24-Hour Ocean Condition Outlook for Tuesday 01/21 to Wednesday 01/22
SWELL: DIR. NW HT. 6-8 PER. 8-18 This morning
Increasing to: DIR. NW HT. 7-9 PER. 8-17 This afternoon
Remaining at: DIR. NW HT. 7-9 PER. 8-16 Tonight
WINDS: DIR. VAR. SPEED 5-10 This morning
Remaining at: DIR. VAR SPEED 5-10 This afternoon
Remaining at: DIR. SE SPEED 10-15 Tonight
==========================================================================
48-Hour Ocean Condition Outlook for Wednesday 01/22 to Thursday 01/23
SWELL: DIR. NW HT. 8-10 PER. 8-15 Wednesday morning
Remaining at: DIR. NW HT. 8-10 PER. 8-15 Wednesday afternoon
Remaining at: DIR. NW HT. 8-10 PER. 8-14 Wednesday night
WINDS: DIR. SE SPEED 10-15 Wednesday morning
Increasing to: DIR. NW SPEED 15-20 + 25 Wednesday afternoon
Remaining at: DIR. NE SPEED 15-20 + 25 Wednesday night
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Extended Ocean Condition Outlook:
A higher-energy west-northwesterly swell is forecast to arrive along
our coastline on January 30 and 31.
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