Cape Shoalwater WA to Cape Lookout OR between 60 and 150 NM Offshore Forecast
| Tonight...N Winds 15 To 20 Kt, Diminishing To 10 To 15 Kt. Seas 4 To 5 Ft. |
| Tue...N To Nw Winds 5 To 10 Kt, Becoming Sw. Seas 4 To 5 Ft. Areas Of Fog With Vsby 1 Nm Or Less Early. |
| Tue Night...Sw Winds 5 To 10 Kt, Becoming S 5 To 15 Kt. Seas 4 To 5 Ft. |
| Wed...S Winds 10 To 15 Kt. Seas 4 To 6 Ft. |
| Wed Night...Sw Winds 10 To 15 Kt. Seas 5 To 6 Ft. |
| Thu...Sw Winds 10 To 15 Kt, Becoming W. Seas 5 To 7 Ft. |
| Thu Night...W To Nw Winds 5 To 15 Kt, Becoming Nw 5 To 10 Kt. Seas 5 To 7 Ft. |
| Fri...Nw Winds 5 To 10 Kt, Becoming W. Seas 4 To 6 Ft. |
| Fri Night...W Winds 10 To 15 Kt, Becoming Nw. Seas 4 To 5 Ft. |
| Sat...Nw Winds 10 To 15 Kt. Seas 4 To 5 Ft. |
| Sat Night...N To Nw Winds 10 To 15 Kt. Seas 5 To 6 Ft. |
| Area Forecast Discussion ...UPDATED National Weather Service Portland OR 957pm PDT Monday August 24 2026 Updated Aviation Discussion Synopsis High pressure aloft remains dominant today with pronounced offshore flow established across the region. This setup will sustain warmth into this evening, with highs in the low 90s across the interior lowlands and near 95 degrees in the Portland/Vancouver metro. Smoke from wildfires may reach the surface at times across Clackamas, Marion, and Multnomah counties, as well as the Columbia Gorge and Upper Hood River Valley. By late Tuesday, a shortwave trough approaches from the northeast Pacific, gradually weakening the offshore regime and introducing onshore flow. This transition ushers in notably cooler conditions by midweek and into the weekend. .SHORT TERM...Now through Tuesday night...Offshore flow persists on the western Cascades and Coast Range slopes, reinforcing temperatures in the low to mid 90s for interior lowlands while coastal areas remain the the upper 60s to near 70 degrees. Gusty offshore winds continue in the western Gorge this afternoon with gusts 25 to 35 mph, creating hazardous travel conditions; these should diminish after sunset as the weak surface boundary moves through the region and offshore flow returns. Smoke plumes from regional fires are now present across portions of the central and northern Willamette Valley, the Portland metro area, and stretching into the western Gorge. Any thick smoke may suppress temperature a degree or two in areas with smoke aloft, mainly north of Salem. Coastal regions will see a return of a light sea breeze this afternoon, moderating winds there. Overnight, offshore flow returns inland, with temperatures dropping to the low to mid 60s in the Portland metro and valley/foothill corridors, and to the mid-50s elsewhere. Tuesday brings slightly lower heigheights aloft as a shortwave trough nears the region. This will nudge afternoon high temperatures to the mid to upper 80s across interior lowlands and near 60 degrees on the coast. The offshore wind regime weakens as onshore begins prevailing across all areas. By Tuesday evening, high pressure over the waters will drive a pronounced westerly push, clearing any remaining smoke east of the Cascades by Wednesday morning. Long Term Wednesday through Sunday...Model guidance remains highly consistent regarding the pattern evolution through the weekend. Multiple ensemble members support an active trough settling into the Pacific Northwest, with successive impulses reinforcing troughing through Saturday. This will drive a sharp and sustained temperature drop beginning Wednesday, with highs quickly sliding from near- average values to the upper 70s Thursday and Friday, potentially dropping to the mid 70s by Saturday. While precipitation remains modest this week, Saturday presents the most robust signal for light rain as a stronger impulse passes. Weaken drizzle is possible Thursday morning with an initial frontal passage, but organization and areal coverage of any shower activity remain uncertain given significant model spread at this extended timeframe. ~12 Marine High pressure offshore maintains northerly winds across the waters. Winds and gusts will ease this evening as high pressure begins to weaken, with winds turning south-southwesterly by midday Tuesday. Largely wind-driven seas continue at 2-6 ft through Tuesday. Southerly flow at 5-15 kt will then persist across the waters through much of the workweek. Periods of winds to 20 kt along the southern Washington and far northern Oregon coasts including the mouth of the Columbia are possible Tuesday afternoon, however the confidence in the persistence of these winds long enough to warrant another Small Craft Advisory in within 10 NM from Cape Shoalwater to Cape Falcon and across the Columbia River Bar are too low at this point. Intermittent gusts to 25 kt are most likely between 11 AM and 8pm PDT Tuesday. The next pattern shift looks to occur Thursday night into Friday, when troughing moves into the Pacific Northwest. This will bring a return to northwesterly flow with low to moderate chances for light rain showers. Seas otherwise continue at 3-6 ft through this weekend. -36 NOAA Portland OR Office: Watches - Warnings - Advisories OR...None. WA...None. PZ...None. |
Portland OR Radar
Northwest Radar