Marine Weather Net

San Juan Islands and Northern Inland Waters Marine Forecast


TONIGHT

S
WINDS
10 - 20
KNOTS

WED

SE
WINDS
TO 10
KNOTS

WED NIGHT

S
WINDS
10 - 20
KNOTS

THU

S
WINDS
TO 10
KNOTS

The Marine Weather Forecast In Detail:
PZZ133 Forecast Issued: 258 PM PDT Tue Jul 27 2021

Tonight...S Wind 10 To 20 Kt. Wind Waves 1 To 3 Ft.
Wed...Se Wind To 10 Kt Becoming W In The Afternoon. Wind Waves 1 Ft Or Less.
Wed Night...S Wind 10 To 20 Kt. Wind Waves 1 To 3 Ft.
Thu...S Wind To 10 Kt Becoming W In The Afternoon. Wind Waves 1 Ft Or Less.
Thu Night...Sw Wind 5 To 15 Kt Becoming S After Midnight. Wind Waves 2 Ft Or Less.
Fri...Nw Wind To 10 Kt Rising To 5 To 15 Kt In The Afternoon. Wind Waves 2 Ft Or Less.
Fri Night...W Wind 5 To 15 Kt. Wind Waves 2 Ft Or Less.
Sat...Light Wind Becoming Sw 15 To 25 Kt. Wind Waves Less Than 1 Ft Becoming 2 To 4 Ft.
Sun...Sw Wind 5 To 15 Kt. Wind Waves 2 Ft Or Less.
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856 AM PDT Tue Jul 27 2021
Northern and Central Washington Coastal and Inland Waters - PZZ100
High pressure offshore with thermal low pressure east of the Cascades will result in varying degrees of onshore flow for much of the upcoming week.
Area Forecast Discussion
National Weather Service Seattle WA
253pm PDT Tuesday July 27 2021

Synopsis
An upper ridge will build over the area this week for a warming trend. The ridge will shift inland early next week with an upper trough moving in from the west and temperatures cooling to near normal.

Short Term - Tonight Through Friday
An upper ridge over the Intermountain West will build slightly westward Wednesday through Friday. This will turn the flow aloft for Western Washington more southerly and weaken low level onshore flow slightly. The result will be less morning low clouds and a gradual warming trend. Highs will be well into the 80s for the interior by Thursday with a few lower 90s possible. Friday should be a couple degrees warmer than Thursday and looks to be the hottest day of the week. The hottest locations should be over the Southwest Interior and in some of the valleys near the Cascades. The heat risk looks to peak in the moderate category on Friday with possible impacts for heat sensitive groups. The southerly flow aloft could also bring some elevated smoke to the area later in the week but most of this is expected to stay to the east and degraded air quality is not expected in Western Washington for now. Schneider

Long Term - Saturday Through Tuesday
Upper heigheights will gradually lower and onshore flow will ramp up as an upper ridge over the Intermountain West shifts east and an upper trough over the Northeast Pacific moves closer to Western Washington. Low level onshore flow will also gradually increase over the period for a return to more night and morning clouds. Ensembles show some moisture coming up from the south Saturday night and Sunday for a slight chance of showers. The best chances for this look to be over the Cascades but there could certainly be a stray shower father west. Schneider

Marine
North winds through the next few days across most of the area. Small Craft Advisory winds over the next few evenings and overnigheights through the central and eastern portions of the Strait of Juan de Fuca. SCA (Small Craft Advisory) winds possibly for the interior coastal waters Wednesday evening and Thursday evening with increasing north winds. Seas of 2 to 3 feet through Wednesday with mainly light westerly swells into Wednesday night. JD

.SEW WATCHES/WARNINGS/ADVISORIES... WA...None. PZ...Small Craft Advisory from 6pm this evening to 6am PDT Wednesday for Central U.S. Waters Strait Of Juan De Fuca- East Entrance U.S. Waters Strait Of Juan De Fuca.