Marine Weather and Tide Forecast for Selma, OR

DISCUSSION
Upper level low pressure has moved in over the Pacific Northwest today, and some form of cyclonic flow will persist overhead through the rest of the week. This will result in near continuous shower chances for at least the coast and Umpqua Basin, with other areas seeing plenty of clouds and periods of light showers as individual systems pass by.

Widespread showers continue this afternoon, with some additional enhancement later tonight into Tuesday morning as the next impulse passes through. Snow levels of around 5000 feet will see little change through tonight, so any showers over the higher Cascade passes could produce some light accumulating snowfall, with total accumulations of only an inch or two likely. Once today's showers diminish, the east side will then remain mostly dry for the impulse tonight into tomorrow. Otherwise, activity will be focused in western Oregon along and west of the Cascades, and especially along the coast and in the Umpqua Basin.

Low pressure settles over the eastern Pacific/Pacific Northwest from Wednesday into the weekend. This low looks to linger just offshore for the remainder of the week, then elongate and sort of split Friday into Saturday. The northern portion of the energy lingers over the Canadian Providences while the southern portion swings through sometime Saturday/Sunday. With the low lingering just offshore, this leads to drier conditions persisting Thursday and Friday, and possibly into Saturday depending on how fast that southern tier of energy swings through. There are position differences, however, on how close to shore that low pressure lingers, so it's possible we see more showery weather continue during this time as well.

Currently, the forecast maintains a broad 20-40% chance of showers Thursday through Saturday. This is a fairly cool air mass settling into the region, and snow levels are forecast to hover around 4000 ft, even down to 3000 ft at times Thursday into the weekend. We're not anticipating widespread precipitation, however, so this will limit any wintry impacts. Light precipitation Friday night has the highest probability of being limited to the coast.
Uncertainty increases a bit for the weekend. A slight chance to chance of showers follows for Saturday, with the ECMWF suite of solutions indicating a higher probability of west side focused rain, a sharper trough, than the GEFS. At this range, still expect the details and timing of rain chances to come into better focus with future model runs.

High temperatures this week will be fairly steady and average around 10-15 degrees below normal...highs in the mid 50s for the West Side, mid 40s for the East Side. Low temperatures will be quite chilly, especially east of the Cascades.

The outlook is for at least brief ridging early next week, Sunday into Monday, with dry conditions.



AVIATION
26/18Z TAFs...Showers will continue through the next 24 hours across the forecast area. Ceilings will be mainly VFR, but with areas of mountain obscuration. lower flight conditions are more likely along the coast, or within heavier showers, where MVFR/IFR conditions are possible. Showers will be most numerous in southwest Oregon. Coverage will become more scattered for the afternoon into the evening with ceilings rising.

This evening into Tuesday morning, expect rain and MVFR along the coast with widespread MVFR and additional showers inland, mainly west of the Cascades.

MARINE
Updated 1230 PM PDT Monday, October 26, 2026...Unsettled weather with occasional showers will continue through the week.
Winds are expected to remain below advisory strength. A series of seasonably weak disturbances will produce the strongest northwest winds in the Washington and northern Oregon offshore waters, which will push fresh swell into the southern Oregon waters. Wave heights will be just high enough and steep enough to reach Small Craft Advisory criteria. Fresh west-northwest swell dominated seas continue for our area into Tuesday, and possibly through Wednesday night. The active pattern is expected to persist late in the week with slight, gradual improvement in conditions.

MFR WATCHES/WARNINGS/ADVISORIES
OR
CA
None.

PACIFIC COASTAL WATERS...Small Craft Advisory until 5 AM PDT Tuesday for PZZ350-356-370-376.