Cascade Head to Florence OR from 10 to 60 NM Marine Forecast
| Rest Of Today...S Wind To 5 Kt. Wind Waves S 1 Ft At 4 Seconds. Nw Swell 3 Ft At 9 Seconds. Widespread Dense Fog In The Morning. Areas Of Dense Fog In The Afternoon. |
| Tonight...N Wind To 5 Kt. Wind Waves N 1 Ft At 4 Seconds. Nw Swell 3 Ft At 9 Seconds. Areas Of Dense Fog In The Evening. Patchy Dense Fog After Midnight. |
| Wed...Ne Wind 5 Kt, Backing To Nw To 5 Kt In The Afternoon. Wind Waves Ne 1 Ft At 4 Seconds, Shifting To The Nw At 4 Seconds In The Afternoon. Nw Swell 3 Ft At 9 Seconds. Patchy Dense Fog In The Morning. |
| Wed Night...Nw Wind 5 Kt, Backing To Se After Midnight. Wind Waves Nw 1 Ft At 4 Seconds, Shifting To The Se At 4 Seconds After Midnight. Nw Swell 3 Ft At 9 Seconds. |
| Thu...S Wind 5 Kt. Wind Waves S 1 Ft At 4 Seconds. Nw Swell 3 Ft At 10 Seconds. |
| Thu Night...N Wind 5 To 10 Kt. Wind Waves N 2 Ft At 4 Seconds. Nw Swell 3 Ft At 10 Seconds. |
| Fri...N Wind 5 To 10 Kt. Wind Waves 2 Ft. Nw Swell 4 Ft. |
| Sat...Nw Wind 5 To 10 Kt. Wind Waves 2 Ft. Nw Swell 4 Ft. |
| Area Forecast Discussion National Weather Service Portland OR 145pm PDT Sat Oct 10 2026 Synopsis Weak low pressure over the region will maintain cool temperatures with very light scattered showers persisting through the evening. High pressure re-builds Sunday to Monday, returning dry and sunny conditions. Cool nigheights will bring chances for morning frost in rural valleys away from urban cores this weekend into early next week. Next chances for light rain arrive Tuesday to Wednesday. Temperatures trend warmer late in the week as an upper-level ridge amplifies over the region. .SHORT TERM...Tonight through Monday night...Lingering light showers are expected to continue to dissipate as high pressure builds over the region through tonight. As high pressure builds, expect skies to slowly clear and temperatures to cool. Light winds, clear skies and cool, overnight lows will result in the potential for fog and frost development tonight. As such, will maintain the current Frost Advisory tonight through Sunday morning as more widespread and impactful frost has a higher probability of developing. There is high confidence for frost and morning lows between 33-36 degrees F over the Upper Hood River Valley, Cascade foothills, north Oregon Coast Range valleys, Battle Ground/Brush Prairie area, and portions of the central/southern Willamette Valley to the east of the I-5 corridor near the foothills (e.g. Lebanon, Scio, Albany, Halsey, Brownsville, Sweet Home, Marcola, Mohawk, Jasper). Sub-freezing temperatures less than 32 degrees are likely in Dee and Parkdale (70-90% chance). Anyone growing outdoor plants that are susceptible to frost damage should cover plants or move plants indoors if possible. Expect dry and sunny conditions Sunday to Monday as upper-level ridging amplifies over the Pacific Northwest, warming temperatures into the mid to upper 60s. Will continue to see chances for frost development each night through Monday night/Tuesday morning as clear skies and calm winds support radiational cooling, especially in rural areas and sheltered valleys. These areas will likely (50-60%) experience temperatures into the mid 30s each morning. /42-10 Long Term Tuesday through Saturday...High pressure will maintain mostly dry conditions with seasonable temperatures through Wednesday. An exception would be southwest Washington and the north Oregon Coast Range and Cascades, where chances for light rain increase to 10-30% as a weak cold front over the coastal waters attempts pushing inland. Even if this front is able to move inland, it would be decaying, which suggests rain amounts would likely be very light if any precipitation is observed. Chances for 48 hour rain totals exceeding 0.10 inch from 5am Tuesday to 5am Thursday are 15-30% across southwest Washington and the north Oregon Coast Range and Cascades, and 5-10% across the Willamette Valley. Will also see increased cloud cover by Wednesday from this weak front, which will keep overnight temperatures warmer and reduce the threat of widespread frost by Tuesday night/Wednesday morning. Thursday and Friday, the majority of ensemble members are in agreement that upper-level ridging will amplify again over the western CONUS. This will result in temperatures rebounding to the low to mid 70s across interior valleys at the end of the week. By next weekend, the ridge of high pressure looks to be pushed eastward by a broad area of low pressure coming from the Gulf of Alaska. However, there is some uncertainty in the clusters. Looking at the 500 mb WPC clusters, clusters 1 and 3 are leaning towards the low with a combiner probability of 59%. Clusters 2 and 4 favor the upper level ridge persisting with a combined probability of 41%. So, while a slightly cooler solution is somewhat favored, it is by no means a sure thing. /42-10 Marine Tonight through at least Monday morning, Small Craft Conditions will continue across all waters. While a renewed round of breezy north/northeasterly winds with gusts up to 20 kt are expected to develop tonight through Sunday evening, steep and choppy seas around 8-10 ft at 9-11 seconds will persist. As such, will maintain a Small Craft Advisory through at least early Monday morning. Winds weaken on Monday but will remain northerly through early Tuesday morning, before turning more southwesterly by the middle of the week ahead of an approaching weak front. Seas are also expected to also subside towards 5-7 ft by Monday with winds remaining below 15 kt. Relatively benign conditions through the majority of the week. /42 NOAA Portland OR Office: Watches - Warnings - Advisories OR...Frost Advisory from midnight tonight to 9am PDT Sunday for ORZ104-106-113-117-121-123>125. WA...Frost Advisory from midnight tonight to 9am PDT Sunday for WAZ205-208. PZ...Small Craft Advisory until 5am PDT Monday for PZZ210-251>253- 271>273. |
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