Pismo Beach Ocean / Surf Report
6/19/2019
SEA/SWELL:
Today's 3- to 5-foot northwesterly (300-degree, deep-
water) swell (with an 8- to 12-second period) will
remain at this level through Thursday morning,
increasing to 6 to 8 feet (with an 8- to 11-second
period) on Thursday afternoon and will remain at this
height through Saturday morning.
This northwesterly (300-degree, deep-water) swell
will lower to 4- to 6-feet (with an 8- to 11-second
period) on Saturday afternoon into Monday morning.
Increasing northwesterly winds Monday afternoon through
Wednesday will generate a 6- to 8-foot northwesterly
(320-degree, deep-water) sea and swell (with a 5- to
11-second period) over the time frame.
Arriving from the Southern Hemisphere:
This morning's 2- to 4-foot Southern Hemisphere
(220-degree, deep-water) swell (with a 15- to 17-
second period) will remain at this level through
tonight.
A 1- to 3-foot Southern Hemisphere (200-degree, deep-
water) swell (with a 16- to 18-second period) will
arrive on Thursday into Saturday.
ATMOSPHERIC CONDITION:
Gentle to moderate (8 to 18 mph) southerly
to northwesterly (onshore) winds today through
Thursday will continue to produce persistent marine
low clouds with areas of fog and mist/drizzle in the
coastal regions. The marine layer will clear by
the afternoon in the coastal valleys, but will
remain overcast along the beaches throughout the
day.
Today's high temperatures will reach the low to mid-
80s in the North County (Paso Robles), while the
coastal valleys (San Luis Obispo) will range between
the low to mid-70s. The beaches will warm to the
low-60s.
An upper-level low-pressure system is expected to
move through the Central Coast on Thursday
into Friday with slightly stronger northwesterly
(onshore) winds and night and morning drizzle along
the coastline.
In fact, the drizzle may be heavy enough to be
measurable (one or two hundreds of an inch) in
many of our beach communities. This system
will also produce cooler weather with Paso Robles
only reaching the mid to high-70s and San Luis
Obispo the low-70s.
High-pressure will build over the Central Coast on
Saturday into Sunday for warmer inland and coastal
valley temperatures, but the marine layer will
continue to persist in the coastal regions.
A change in the weather pattern will occur on Monday
into next Wednesday as fresh to strong (19 to 31 mph)
northwesterly winds develop along the coastline.
These winds should be strong enough to mix out the
marine layer, leaving behind sunny skies along many
of the beaches. Overall, temperatures should remain
seasonably cool with no clear signs of any heat waves
through the end of June or longer.
WILDFIRE INDEX RATINGS:
Today's PG&E Fire Index Ratings are at medium levels
along the coastline and coastal valleys, while the
inland valleys are at high levels.
The PG&E Fire Index Ratings will lower to low levels
along the coastline and coastal valleys and medium
levels in the inland valleys on Thursday.
Weather graphics and power outage information are available
at: twitter.com/pge_john.
Yesterday's Today's Tomorrow's
Min Max Min Max Min Max
55.5° 61.1° 55.3° 60.0° 55.0° 60.0°
PG&E Weather Office in San Francisco predicted temperatures
for San Luis Obispo County
Inland Temperatures, Paso Robles
Actual Predicted
Tue Wed Thu Fri Sat Sun Mon Tue Wed
51 92 54 85 58 76 50 79 51 84 51 84 49 78 48 75 47 77
Coastal Valleys Temperatures, San Luis Obispo
Tue Wed Thu Fri Sat Sun Mon Tue Wed
53 72 57 72 58 72 54 70 54 71 52 72 52 66 52 67 53 70
WINDS:
Gentle to moderate (8 to 18 mph) southerly to northwesterly
(onshore) winds are forecast later today through Thursday.
Moderate to fresh (13 to 24 mph) afternoon northwesterly winds
are forecast on Friday and Saturday, decreasing on Sunday.
Fresh to strong (19 to 31 mph) northwesterly winds are expected
on Monday into next Wednesday.
DIABLO CANYON METEOROLOGICAL TOWER WIND DATA:
Last night's Maximum Winds:
Max peak winds: SE 10.0 mph @ 4:45 a.m.
Max sustained wind: SE 8.0 mph @ 4:45 a.m.
Yesterday's Maximum Winds:
Max peak winds: NW 14.0 mph @ 11:45 a.m.
Max sustained wind: NW 9.0 mph @ 11:45 a.m.
SEAWATER TEMPERATURES:
Intake seawater temperatures will range between 54 and 57
degrees though today, increasing to 56 to 59 degrees on
Thursday into Sunday.
OCEAN CURRENTS:
A southerly (offshore) flowing current will develop during
the afternoon, shifting to the north (onshore) during
the night and morning. This pattern will continue into
Sunday.
SEAWATER VISIBILITY:
Seawater visibility was 8 to 10 feet at the Diablo Canyon Marina.
==========================================================================
24-Hour Ocean Condition Outlook for Wednesday 06/19 to Thursday 06/20
SWELL: DIR. NW HT. 3-5 PER. 8-12 This morning
Remaining at: DIR. NW HT. 3-5 PER. 8-12 This afternoon
Remaining at: DIR. NW HT. 3-5 PER. 8-12 Tonight
(Combined with: DIR. SW HT. 2-4 PER. 15-17 All day)
WINDS: DIR. VAR. SPEED 5-10 This morning
Increasing to: DIR. NW SPEED 10-15 This afternoon
Decreasing to: DIR. VAR. SPEED 5-10 Tonight
==========================================================================
48-Hour Ocean Condition Outlook for Thursday 06/20 to Friday 06/21
SWELL: DIR. NW HT. 3-5 PER. 8-12 Thursday morning
Remaining at: DIR. NW HT. 3-5 PER. 8-12 Thursday afternoon
Remaining at: DIR. NW HT. 3-5 PER. 8-12 Thursday night
(Combined with: DIR. SW HT. 1-3 PER. 16-18 All day Thursday)
WINDS: DIR. SE SPEED 5-10 Thursday morning
Increasing to: DIR. NW SPEED 10-15 Thursday afternoon
Decreasing to: DIR. VAR. SPEED 5-10 Thursday night
==========================================================================
Extended Ocean Condition Outlook:
Increasing northwesterly winds Monday afternoon through
Wednesday will generate a 6- to 8-foot northwesterly
(320-degree, deep-water) sea and swell (with a 5- to
11-second period) over this time frame.
==========================================================================
