Pismo Beach Ocean / Surf Report
7/19/2019
SEA/SWELL:
A 3- to 5-foot northwesterly (300-degree, deep-water) swell
(with an 8- to 10-second period) will continue at this
level through Monday.
A 4- to 6-foot northwesterly (320-degree, deep-water)
sea and swell (with a 5- to 8-second period) will develop
along our coastline on Tuesday through Thursday.
Arriving from the Southern Hemisphere:
Today's 1- to 3-foot Southern Hemisphere (210-degree, deep-
water) swell (with a 13- to 15-second period) will remain
at this height through tonight.
A 1- to 2-foot Southern Hemisphere (190-degree, deep-
water) swell (with a 15- to 17-second period) will arrive
along our coastline on Tuesday into Thursday.
ATMOSPHERIC CONDITION:
Gentle to moderate (8 to 18 mph) northwesterly (onshore)
winds will continue through Sunday. In response, the marine
layer will become persistent during the afternoon hours
along our coastline with a "no-sky July" condition
possible along many of the beaches over this time frame.
Today's high temperatures will reach the low-80s in the
North County (Paso Robles) and low 70s in the coastal
valleys (San Luis Obispo). The beaches will remain in
the 60s.
A warm ridge of high pressure will begin to nudge
westward toward the Central Coast this weekend,
bringing a warming trend with temperatures approaching
seasonable readings in the inland valleys. The inland
valley temperatures (Paso Robles) will continue to rise,
reaching triple-digit levels by Tuesday and Wednesday.
Note: Monsoonal flow may creep up the Sierra Nevada starting
Saturday afternoon, allowing for isolated afternoon
thunderstorms confined to high terrain.
There is a chance that monsoonal moisture will rotate into
the Central Coast by the first week August. This subtropical
moisture will produce variable mid to high-level clouds
with warmer overnight lows and cooler daytime highs in
the inland and coastal valleys. Higher humidity levels and
a chance of rain shower and thunderstorms may also develop.
The stretch of warm summertime weather could last through
the remainder of the month with no immediate signs of extreme
heat seen at this time.
WILDFIRE INDEX RATINGS:
The PG&E Fire Index Ratings will remain at medium levels
along the Coastline, Coastal and Inland valleys today,
Saturday and Sunday.
The Far Inland areas will remain at high to very high
level today, Saturday and Sunday.
Yesterday's Today's Tomorrow's
Min Max Min Max Min Max
54.2° 62.8° 54.3° 62.0° 54.0° 62.0°
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
51 87 55 82 53 83 52 90 53 96 57 101 59 103 62 100 60 101
Coastal Valleys Temperatures, San Luis Obispo
Thu Fri Sat Sun Mon Tue Wed Thu Fri
53 75 56 72 55 72 55 71 53 75 53 74 54 78 55 82 56 81
WINDS:
Gentle to moderate (8 to 18 mph) southwesterly to northwesterly
winds are forecast today into Monday.
Moderate to fresh (13 to 24 mph) northwesterly winds are
forecast on Monday, increasing to fresh to strong (19 to 31 mph)
levels on Tuesday and Wednesday.
DIABLO CANYON METEOROLOGICAL TOWER WIND DATA:
Last night's Maximum Winds:
Max peak winds: NW 10.0 mph @ 6:15 a.m.
Max sustained wind: NW 7.0 mph @ 6:15 a.m.
Yesterday's Maximum Winds:
Max peak winds: NW 18.0 mph @ 8:00 p.m.
Max sustained wind: NW 15.0 mph @ 8:00 p.m.
SEAWATER TEMPERATURES:
Intake seawater temperatures will range between 53 and 56
degrees through today, gradually increasing on Saturday
through Monday.
OCEAN CURRENTS:
A pattern of a northerly (onshore) flowing current developing
during the night and morning, becoming a southerly (offshore)
flowing current during the afternoon will start today and
will continue through Monday.
A southerly (offshore) flowing current is forecast on Tuesday
through Thursday.
SEAWATER VISIBILITY:
Seawater visibility was 15 to 17 feet at the Diablo Canyon Marina.
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24-Hour Ocean Condition Outlook for Friday 07/19 to Saturday 07/20
SWELL: DIR. NW HT. 2-4 PER. 8-10 This morning
Increasing to: DIR. NW HT. 3-5 PER. 8-10 This afternoon
Remaining at: DIR. NW HT. 3-5 PER. 8-10 Tonight
(Combined with: DIR. SW HT. 2-4 PER. 13-15 All day)
WINDS: DIR. NW SPEED 5-10 This morning
Increasing to: DIR. NW SPEED 10-15 This afternoon
Decreasing to: DIR. NW SPEED 5-10 Tonight
==========================================================================
48-Hour Ocean Condition Outlook for Saturday 07/20 to Sunday 07/21
SWELL: DIR. NW HT. 3-5 PER. 8-10 Saturday morning
Remaining at: DIR. NW HT. 3-5 PER. 8-10 Saturday afternoon
Remaining at: DIR. NW HT. 3-5 PER. 8-10 Saturday night
WINDS: DIR. SW SPEED 5-10 Saturday morning
Increasing to: DIR. NW SPEED 10-15 Saturday afternoon
Decreasing to: DIR. NW SPEED 5-10 Saturday night
==========================================================================
Extended Ocean Condition Outlook:
A 4- to 6-foot northwesterly (320-degree, deep-water)
sea and swell (with a 5- to 8-second period) will develop
along our coastline on Tuesday and Wednesday.
==========================================================================
