Cascade Head to Florence, OR out 10 NM Marine Forecast
| Rest Of Today...Sw Wind To 5 Kt. Wind Waves Sw 1 Ft At 4 Seconds. Nw Swell 2 Ft At 9 Seconds. Widespread Dense Fog And A Chance Of Showers In The Morning, Then 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...N Wind 5 Kt. Wind Waves N 1 Ft At 4 Seconds. Nw Swell 3 Ft At 9 Seconds. Patchy Dense Fog In The Morning. |
| Wed Night...Nw Wind 5 Kt. Wind Waves W 1 Ft At 4 Seconds. Nw Swell 3 Ft At 9 Seconds. |
| Thu...Se Wind 5 Kt, Veering To W In The Afternoon. Wind Waves Se 1 Ft At 4 Seconds, Shifting To The W At 4 Seconds In The Afternoon. Nw Swell 3 Ft At 10 Seconds. |
| Thu Night...N Wind 5 To 10 Kt. Wind Waves N 1 Ft At 4 Seconds. Nw Swell 3 Ft At 10 Seconds. |
| Fri...N Wind 5 To 10 Kt. Wind Waves 2 Ft. Nw Swell 3 Ft. |
| Sat...Nw Wind 5 To 10 Kt. Wind Waves 2 Ft. Nw Swell 4 Ft. |
| Area Forecast Discussion National Weather Service Portland OR 1130am PDT Sat Oct 11 2025 Synopsis A broad upper-level trough and embedded coastal low continues to drive cool and unsettled weather across the Pacific Northwest through the weekend. Expect periodic rain, mountain snow, and below-normal temperatures. Conditions gradually moderate midweek as a ridge builds over the region, though model uncertainty grows toward late week. Now through Friday...Satellite and radar imagery early this morning depict a compact upper-level low now centered near the Oregon coast, with widespread cloud cover and intermittent light to moderate rain inland. As of 4 AM, overnight temperatures have dipped into the low 50s to upper 40s across the interior valleys, and a Frost Advisory remains in effect for Hood River County until 8am this morning. Uncertainty persists regarding additional frost or freeze headlines over the next few nights. For Saturday night into Sunday, frost formation hinges on whether clouds sufficiently clear - confidence remains low to moderate. The Sunday night into Monday period could see near-freezing conditions as cold air lingers, though thicker cloud cover may limit frost formation. Monday night into Tuesday currently appears to hold the highest potential for a Freezing Warning, given cloud cover is forecasted to clear through Monday. As the coastal low drifts slowly inland today, expect another period of widespread rain, tapering to showers by late afternoon and evening. Rainfall totals through today are forecast to range from 0.10-0.20 inches in the interior valleys to 0.20-0.40 inches along the coast, Coast Range, and Cascades. Probabilities for 24 hour accumulation exceeding 0.50 inches sit around 15-30% for the Willamette Valley and 40-80% for the coast, Coast Range, and Cascades. The upper low begins to move eastward late tonight into Sunday, allowing for a transition to more showery and convective precipitation. Model soundings and ensemble guidance suggest around a 15% chance for isolated thunderstorms through much of Sunday, primarily along the coast but still possible inland. By Sunday night, a colder post-frontal air mass settles into the region. Highs Sunday and Monday will remain in the mid 50s to low 60s for most lowland areas and upper 30s to upper 40s across higher terrain. Snow levels lower to around 3500-5000 ft, bringing the potential for 2 to 5 inches of wet snow near pass level, with up to 6 to 12 inches at higher elevations above 5000 ft. For Saturday through Monday, ensemble 72 hour total precipitation probabilities indicate a 50-75% chance for 1 inch or more across the interior lowlands and 75-95% for coastal and mountainous areas. For 1.50 inches, probabilities drop to 20-40% for the valleys and 50-80% for higher terrain. Tuesday into Wednesday, a transition toward higher pressure and drier weather is expected as ensemble cluster guidance favors a ridge building over the northeast Pacific. This will bring moderating temperatures, highs climbing into the 60s and Probability of Precipitation dropping to 10-20%. Uncertainty increases toward Thursday and Friday. Several ensemble members rebuild the offshore low and push it back toward the coast. If that scenario materializes, weak onshore flow and increasing cloud cover could return, bringing Probability of Precipitation back up into the 30-50% range. Confidence in this late week pattern remains low as ensemble spread continues to widen regarding the strength and placement of the reemerging trough. ~12 Marine A weak low pressure system shifting inland will result in northwesterly winds building across the waters this afternoon and evening. There is a 25% chance that gusts briefly peak around 35 kt beyond 40 NM across the northern waters, but given the brevity and low confidence of occurrence will keep Small Craft Advisory in place. There is an 80% chance that seas build into the 9-14 ft range across the waters this evening into early Sunday. The highest seas will be across the northern outer waters while the lowest seas will be across the southern inner waters off the central coast of Oregon. A weak low pressure will then drop southward across the waters late Sunday into Monday. This will usher in a reinforcing shot of gusty northerly winds during this period. Seas will remain elevated as a result. High pressure then looks to build back across the northern Pacific during the middle of next week. This looks to allow seas to drop down to around 5 ft. There remains quite a bit of uncertainty surrounding the weather pattern next week. end of next week has a fair amount of uncertainty as guidance suggests an 80% chance that significant wave heigheights will be between 6 and 13 ft across the waters on Friday/Saturday. NOAA Portland OR Office: Watches - Warnings - Advisories OR...Frost Advisory until 8am PDT this morning for ORZ121. WA...None. PZ...Small Craft Advisory from 5pm this afternoon to 11pm PDT this evening for PZZ210. Small Craft Advisory from 3pm this afternoon to 11pm PDT this evening for PZZ251>253-272-273. Hazardous Seas Watch from this evening through Sunday afternoon for PZZ251>253-272-273. Small Craft Advisory from noon today to 5pm PDT this afternoon for PZZ271. Hazardous Seas Watch from this afternoon through Sunday afternoon for PZZ271. |
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