Seaside, Oregon Weather Conditions

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Current Conditions

  • 58°
  • Haze
  • Wind: North 6 mph
  • Humidity: 65%
  • Visibility: 5.0 miles
  • Dew Point: 46°
  • Pressure: 30.36 in. -

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Next 12 Hours

11  am
2  pm
5  pm
8  pm
11  pm
Partly Cloudy
Partly Cloudy
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Saturday
  • Partly Cloudy
  • High: 62 °
  • Low: 46 °
  • Partly Cloudy
  • Sunday
  • Clear
  • High: 79 °
  • Low: 54 °
  • Clear
  • Monday
  • Clear
  • High: 71 °
  • Low: 50 °
  • Clear
  • Tuesday
  • Chance of Rain
  • High: 62 °
  • Low: 48 °
  • Chance of Rain
  • Wednesday
  • Chance of Rain
  • High: 59 °
  • Low: 46 °
  • Chance of Rain

Forecast for Seaside, Oregon

Updated: 9:56 am PDT on April 30, 2016

  • Today

    Partly cloudy in the late morning and early afternoon... then mostly sunny. Highs 60 to 65. Northwest wind 5 to 15 mph.

  • Tonight

    Mostly clear. Lows 45 to 50. North wind 5 to 15 mph.

  • Sunday

    Sunny...warmer. Highs 75 to 80. Northeast wind 5 to 10 mph.

  • Sunday Night

    Clear. Lows 50 to 55. Northeast wind 5 to 10 mph. In the higher terrain...east wind 10 to 15 mph increasing to 15 to 25 mph after midnight.

  • Monday

    Mostly sunny. Highs 75 to 85. Light wind becoming south 5 to 15 mph in the afternoon. In the higher terrain...east wind 10 to 20 mph...becoming southeast in the afternoon.

  • Monday Night

    Partly cloudy with a 20 percent chance of showers. Lows around 50.

  • Tuesday

    Mostly cloudy with a 30 percent chance of showers. Highs 65 to 70.

  • Tuesday Night

    Cloudy with a 40 percent chance of showers. Lows 45 to 50.

  • Wednesday

    Cloudy with a 50 percent chance of showers. Highs 60 to 65.

  • Wednesday Night

    Cloudy with a 40 percent chance of showers. Lows around 45.

  • Thursday

    Mostly cloudy with a 30 percent chance of showers. Highs 55 to 60.

  • Thursday Night

    Mostly cloudy with a 20 percent chance of showers. Lows around 45.

  • Friday

    Partly sunny. Highs 60 to 65.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: 4th St. Gearhart, Gearhart, OR

Updated: 11:50 AM PDT

Temperature: 57.0 °F Dew Point: 47 °F Humidity: 70% Wind: North at 4.9 mph Pressure: 30.58 in Hourly Precipitation: 0.00 in Graphs

Location: Fork Island, Nehalem, OR

Updated: 11:50 AM PDT

Temperature: 62.6 °F Dew Point: 43 °F Humidity: 49% Wind: NW at 3.2 mph Pressure: 30.32 in Hourly Precipitation: - Graphs

Location: Long Lakes II, Warrenton, OR

Updated: 11:50 AM PDT

Temperature: 54.9 °F Dew Point: 47 °F Humidity: 74% Wind: WNW at 4.0 mph Pressure: 30.36 in Hourly Precipitation: 0.00 in Graphs

Location: Warrenton, Oregon, Warrenton, OR

Updated: 9:01 AM PDT

Temperature: 54.4 °F Dew Point: 46 °F Humidity: 72% Wind: NNE at 2.0 mph Pressure: 30.29 in Hourly Precipitation: 0.00 in Graphs

Location: South Slope, Astoria, OR

Updated: 11:50 AM PDT

Temperature: 56.6 °F Dew Point: 46 °F Humidity: 67% Wind: WSW at 1.0 mph Pressure: 30.37 in Hourly Precipitation: 0.00 in Graphs

Location: Central Rockaway, Rockaway Beach, OR

Updated: 11:51 AM PDT

Temperature: 58.1 °F Dew Point: 48 °F Humidity: 69% Wind: WNW at 3.0 mph Pressure: 30.37 in Hourly Precipitation: 0.00 in Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion

Area forecast discussion 
National Weather Service Portland or 
921 am PDT Sat Apr 30 2016 

Synopsis...clouds will dissipate this morning as strong high pressure 
builds into British Columbia and Washington state today. As the upper 
high builds to the north...drier north to northeasterly flow 
develops. This will cause a significant warmup commencing this 
afternoon and continuing through Monday. High temperatures will 
jump 15 to 20 degrees above normal Sunday...cooling along the coast 
Monday but remaining warm inland. As the upper high moves into 
Alberta Monday...low to middle level flow turns southerly/southwesterly 
bringing a chance of thunderstorms mainly to the Cascades Monday 
afternoon/evening. Shower chances will increase across the entire 
area by a slow moving cold front approaches from the 
Pacific. Cooler and showery weather is expected to continue for the 
remainder of the week. 


Update...morning satellite trends show marine layer cloudiness 
mainly along the north coast...Columbia River lowlands/northern 
Willamette Valley...and eastern Willamette Valley/Cascades. As 
initial mixing develops stratus has expanded over the past hour or 
two...but forecast soundings show lower tropospheric flow turning 
offshore and warming beginning by 18z. Mixed layer then deepens 
sufficiently thereafter for clearing throughout the area. Hrrr runs 
depict trend nicely with mainly sunny /albeit through cirrus/ 
between 19-20z. Remainder of weekend under northerly/northeasterly 
flow and warmer airmass. Bright 

Previous short/long term discussions follow... 

Short through Monday...water vapor satellite imagery 
shows our upper low digging S-southeast along the California/Nevada border and headed 
toward Arizona. Lingering low-level moisture continues to bank up 
against the Cascades and Coast Range...producing enough drizzle or 
light rain to measure at a few RAWS sites here and there. Tough to 
discriminate between actual precipitation and melting snow at some of 
the higher elevation sites...but am fairly confident some areas of 
drizzle will continue in the higher terrain beyond 12z this morning. 
Will keep probability of precipitation low...around 10 percent...but added mention of drizzle 

Otherwise...the main story the next few days will be yet another warm 
spell across SW Washington/northwest or. This will likely be the third warm spell 
with highs in the 80s this season for inland valleys...and possibly 
the coast as well. Today will be the transition day with decreasing 
clouds and a few degrees of warming versus Friday. Flow aloft turns 
decidedly easterly tonight and Sunday as the upper low over the 
southwestern United States tries to get into a Rex block with a 
strengthening upper ridge over western Canada and Washington. This 
will cause the warming trend to begin in earnest for Sunday and 
Monday. As flow turns offshore the air mass will dry considerably. 
This should bring plenty of sunshine for Sunday and Monday. 

Temperatures at 850 mb do not look quite as warm as the last two events... 
nor will 500 mb heights be quite as high. Seeing fairly good model 
agreement regarding how warm the air mass will be...with both the 00z 
GFS and European model (ecmwf) showing 850 mb temperatures peaking at around +15 degree c over 
the Willamette Valley Sunday and Monday. Having difficulty pulling up 
archived sounding data at the moment...but based on memory this 
compares to +17 to +20 degree c from our past two warm spells. With deep 
easterly flow developing just above the surface... any thermal trough 
which develops will likely stay offshore Sunday. This should allow 
the coast to get in on the warming as well... possibly even being the 
warmest in our County Warning Area on Sunday as they take advantage of the 
double-downslope effect off both the Cascades and Coast Range. 
Although the air mass does not appear warm enough for 90s this time 
around...80s appear to be a good bet for just about anyone at low 
elevation in our County Warning Area Sunday and/or Monday. 

00z/06z NAM show what seems to be a pretty realistic evolution of the 
thermal trough into a thermal low just off the coast Sun night/ early 
Monday...which then lifts north along the Pacific northwest coast Monday. This 
could prompt a S-SW surge of marine air along the coast Monday... 
possibly trickling inland enough to keep temperatures a little cooler for 
Eugene. As one part of the thermal low lifts north along the Pacific northwest 
coast...another portion will likely migrate across the Willamette 
Valley and Cascades Monday afternoon. This could enhance 
instability...with the leading edge of cooler marine air effectively 
working as a cold front to provide some added lift for surface-based 
parcels. Model soundings are showing a decent amount of instability 
for the Willamette Valley Monday...with the 06z NAM now showing about 
1000-1500 j/kg of ml cape and only weak cin during the afternoon. 
Will hold off on adding a thunder mention west of the Cascade 
foothills for now...but future shifts may need to revisit this. It is 
notable that the 00z GFS shows considerably less cape for the 
Willamette Valley Monday afternoon...closer to 300-500 j/kg of ml 
cape...which also swayed US toward holding off on the thunder mention 
aside from the Cascades. Either way...shower chances start to 
increase Monday...and the remainder of the week looks closer to 
normal for Spring with cooler temperatures and showers at times. 

A climate note to further put this extremely warm Spring into 
perspective...pdx has already had six 80-degree days this season. 
This is an all-time record pace for pdx...and only 2004 and 1947 have 
had 5 80-degree days by the end of April since records started in 
1940. In Stark contrast...1954 had just 10 80-degree days the entire 
year at pdx. The average for an entire year at pdx is 51 days. Using 
pdx as an example again...the mean temperature for April 2016 through 
the 28th is 57.9 degree f...5.9 degree f above normal and a stunning 1.6 
degree f above the previous record of 56.3 degree f from April 2004. 
Records are not just being broken...they are being shattered due to 
the series of Summer-caliber upper ridges that have affected the Pacific 
northwest this month. May 2016 looks to be starting no differently. Weagle 

Long term...Monday night through Friday...models seem to be showing 
reasonable agreement that relatively cooler marine air will push 
inland and deepen on SW flow Monday night and thermal 
low pressure shifts north and east of the forecast area. With little 
to no easterly component to the flow aloft and increasingly stable 
marine air in the lower levels...decided to remove thunderstorms from 
The Lowlands Tuesday and Wednesday. The better chance for thunder in 
The Lowlands may actually be Monday as the leading edge of marine air 
acts as a lifting mechanism on a somewhat unstable air mass. Assuming 
the early week upper ridge does not form a strong and persistent Rex 
block...models suggest the ridge will migrate eastward enough to 
allow an upper trough to take residence over the Pacific northwest middle to late 
week. This solution would bring a cooldown closer to normal temperatures for 
early may along with plenty of showers. Weagle 


Aviation...scattered high MVFR ceilings this morning as stratus 
continues to back build from the Cascade foothills. Stratus will 
continue to expand west in coverage through 17z-18z and then break 
up through about 20z. Then the trend should be VFR conditions with 
dissipating clouds through the afternoon as drier northerly flow 

Kpdx and approaches...ceiling around 2500 to 3000 feet through 19z-20z 
then breaking up and cloud dissipating with VFR conditions through 
the afternoon. 


Marine...a thermal trough over the south Oregon coast will 
strengthen today bringing increasing winds across the waters 
later this morning and through the afternoon. The strongest winds 
are expected south of about Cascade Head. Winds near shore should 
ease later this evening...but continue over the outer marine zones 
into Sun morning. The thermal trough expands north Sunday then 
shifts over the coastal waters Sun night and continues to the 
Washington coastal waters Monday. 

Seas have been generally running 7 to 8 feet this morning with 
dominant period increasing to 10 to 11 seconds. Have let the Small 
Craft Advisory for seas expire but will keep a close eye on seas 
in case periods decrease with increasing winds today to cause a 
return of square seas. Bowen 


Pqr watches/warnings/advisories... 
Pz...Small Craft Advisory for hazardous seas until 9 am PDT this 
morning for coastal waters from Cape Shoalwater Washington to Florence 
or out 60 nm. 

Small Craft Advisory for winds from 2 PM this afternoon to 
midnight PDT tonight for coastal waters from Cape 
Shoalwater Washington to Cascade Head or out 10 nm. 

Small Craft Advisory for winds until midnight PDT tonight for 
coastal waters from Cascade Head to Florence or out 10 nm. 



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This discussion is for northwest Oregon and southwest Washington 
from the Cascade crest to 60 nautical miles offshore. The area is 
commonly referred to as the forecast area. 

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