Pismo Beach Ocean / Surf Report
5/21/2019
SEA/SWELL:
A 10- to 12-foot northwesterly (310-degree, deep-
water) sea and swell (with a 7- to 14-second period)
will arrive later this afternoon and will remain at
this height through Wednesday morning, decreasing to
9 to 11 feet (with a 7- to 12-second period) by
Wednesday afternoon and night.
This northwesterly (310-degree, deep-water) sea and
swell will further decrease to 8- to 10-feet (with
a 7- to 11-second period) on Thursday, becoming a
to 7 to 9 foot northwesterly (300-degree, deep-
water) swell (with an 8- to 10-second period) on
Friday.
A 4- to 6-foot northwesterly (290-degree, deep-water)
swell (with an 8- to 11-second period) is forecast
along our coastline on Saturday into next Tuesday.
Arriving from the Southern Hemisphere:
Today's 1- to 2-foot Southern Hemisphere (180-degree,
deep-water) swell (with a 15- to 17-second period)
will continue at this height into Wednesday.
A 2- to 3-foot Southern Hemisphere (220-degree, deep-
water) swell (with a 16- to 18-second period) will
arrive on Thursday into Friday.
ATMOSPHERIC CONDITION:
A cold front produced gentle to moderate (8 to 18 mph)
southerly winds and areas of drizzle/rain showers this
morning.
Rainfall amounts have been generally below a tenth of
an inch throughout the Central Coast. However, Jim at
Oak Shores recorded 0.53 of an inch, while Rocky
Butte has seen 0.16 of an inch of rain. Snow is falling
in the Sierra Nevada above 5,000 feet.
This cold front will be followed by moderate gale-force
to fresh gale-force (32 to 46 mph) northwesterly winds
and partly cloudy skies this afternoon.
Strong to gale-force (25 to 38 mph) northwesterly winds,
partly cloudy but dry weather is forecast on Wednesday.
Gentle to moderate (8 to 18 mph) southerly winds, mostly
cloudy skies and cooler weather is forecast on Thursday
into Friday.
An upper-level low-pressure system will move into the
Central Coast over the Memorial Day Weekend. This system
will produce cooler temperatures along with rain showers
and a chance of thunderstorms on Saturday, Sunday and
Monday.
Dry weather may then return to most areas late next week
except for continued lingering showers over the Sierra
Nevada. Still no clear signs of any early season heat
waves through the end of the month and into early June.
WILDFIRE DANGER RATINGS:
Today's PG&E Fire Index Ratings are at low levels
along the coastline, coastal valleys and in the inland
valleys.
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
54.4° 58.3° 51.1° 57.0° 51.0° 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
44 69 48 65 49 71 49 69 51 73 51 65 49 70 46 78 50 81
Coastal Valleys Temperatures, San Luis Obispo
Mon Tue Wed Thu Fri Sat Sun Mon Tue
48 66 51 63 48 65 50 66 55 71 52 69 48 67 49 68 50 73
WINDS:
Moderate gale-force to fresh gale-force (32 to 46 mph)
northwesterly winds are forecast this afternoon, decreasing
to strong to gale-force (25 to 38 mph) levels on Wednesday.
The winds will decrease and shift out of the south on Thursday
into Sunday.
DIABLO CANYON METEOROLOGICAL TOWER WIND DATA:
Last night's Maximum Winds:
Max peak winds: SE 17.0 mph @ 6:45 a.m.
Max sustained wind: SE 9.0 mph @ 6:45 a.m.
Yesterday's Maximum Winds:
Max peak winds: NW 36.0 mph @ 10:15 p.m.
Max sustained wind: NW 28.0 mph @ 10:15 p.m.
SEAWATER TEMPERATURES:
Intake seawater temperatures will range between 54 and 57
degrees through today, decreasing to 53 to 54 degrees on
Wednesday into Sunday.
OCEAN CURRENTS:
A southerly (offshore) flowing current will develop this
afternoon and will continue into Sunday.
SEAWATER VISIBILITY:
Seawater visibility was 5 to 7 feet at the Diablo Canyon Marina.
==========================================================================
24-Hour Ocean Condition Outlook for Tuesday 05/21 to Wednesday 05/22
SEA/SWELL: DIR. NW HT. 5-7 PER. 8-12 This morning
Increasing to: DIR. NW HT. 7-9 PER. 5-14 This afternoon
Increasing to: DIR. NW HT. 10-12 PER. 6-14 Tonight
(Combined with: DIR. SW HT. 1-2 PER. 15-17 All day)
WINDS: DIR. SE SPEED 15-20 This morning
Increasing to DIR. NW SPEED 25-30 + 35 Late morning
Increasing to: DIR. NW SPEED 35-40 + 50 This afternoon
Decreasing to: DIR. NW SPEED 20-25 + 30 Tonight
==========================================================================
48-Hour Ocean Condition Outlook for Wednesday 05/22 to Thursday 05/23
SEA/SWELL: DIR. NW HT. 10-12 PER. 7-13 Wednesday morning
Decreasing to: DIR. NW HT. 9-11 PER. 7-12 Wednesday afternoon
Remaining at: DIR. NW HT. 9-11 PER. 7-12 Wednesday night
(Combined with: DIR. SW HT. 1-2 PER. 15-17 All day Wednesday)
WINDS: DIR. NW SPEED 15-20 + 30 Wednesday morning
Increasing to: DIR. NW SPEED 30-35 + 40 Wednesday afternoon
Decreasing to: DIR. NW SPEED 10-15 + 20 Wednesday night
==========================================================================
Extended Ocean Condition Outlook:
A 4- to 6-foot northwesterly (310-degree, deep-water)
swell (with an 8- to 11-second period) is forecast
along our coastline on Saturday into next Tuesday.
==========================================================================
