San Juan Islands and Northern Inland Waters Marine Forecast
| Today...Sw Wind 5 To 10 Kt, Rising To 10 To 15 Kt Late This Morning And Afternoon. Waves Around 2 Ft Or Less. A Slight Chance Of Rain This Morning, Then A Chance Of Rain This Afternoon. |
| Tonight...S Wind 10 To 15 Kt, Rising To 15 To 20 Kt After Midnight. Waves Around 2 Ft Or Less. A Chance Of Rain In The Evening, Then Rain Likely After Midnight. |
| Thu...S Wind 15 To 20 Kt, Becoming Sw 10 To 15 Kt In The Afternoon. Waves Around 2 Ft Or Less. Rain Likely. |
| Thu Night...Sw Wind 10 To 15 Kt. Waves Around 2 Ft Or Less. Rain Likely, Mainly In The Evening. |
| Fri...W Wind 5 To 10 Kt. Waves Around 2 Ft Or Less. A Chance Of Rain. |
| Fri Night...W Wind 5 To 10 Kt, Veering To N After Midnight. Waves Around 2 Ft Or Less. |
| Sat...N Wind 5 To 10 Kt. Waves Around 2 Ft Or Less. |
| Sat Night...N Wind 5 To 10 Kt. Waves Around 2 Ft Or Less. |
| Sun...N Wind Around 5 Kt. Waves Around 2 Ft Or Less. |
| Sun Night...Nw Wind Around 5 Kt, Veering To Ne After Midnight. Waves Around 2 Ft Or Less. |
| Area Forecast Discussion National Weather Service Seattle WA 901am PST Wednesday Feb 25 2026 Synopsis The next disturbance will cross the area on Wednesday, bringing additional snow to the mountains and rain to the lowlands. After showers linger later in the week, primarily in the northern interior, a trend towards drier conditions emerge over the weekend and continue into the first half of next week. Short Term - Today through Friday A stagnant pattern remains in the upper-levels of the atmosphere. Upstream, a rex block is the culprit as a high center stretches into the Bering Sea in concert with a cutoff low on the southern periphery of the area of high pressure. Closer to home, northwest flow regime aloft with high pressure at the surface. Today will start off dry with patchy low clouds and fog in the early morning. Then, the next frontal system will arrive from of the NW, bringing a glancing blow of lowland rain showers (primarily along the coast and Olympics) and mountain snow mostly for the North Cascades - Stevens Pass northward. Intense snowfall rates are not expected but instead rather steady with snow totals ranging close to a foot for areas such as Mt. Baker Ski area through Friday. Snow levels mainly 2,000 to 3,000 throughout the short-term forecast. The upper-level pattern won't vary much for the next few days. Temperatures are forecast to remain seasonal with highs in the upper 40s to near 50 F. Overnight lows are forecast to fall into the mid 30s to lower 40s. 41 Long Term - Friday Night Through Tuesday Ensembles suggests the upper-level pattern will progress in the long-term forecast. The aforementioned cut off low will become ingested in the mean-flow over the weekend as it tracks inland over N. California/S. Oregon. An upper-ridge will gradually position over the PNW by early next week. Daytime highs are slated to remain around average with cool overnight lows in the lower to mid 30s. Marine Moderate onshore flow prevails through Thursday with winds gradually easing on Friday. Seas will also build over 10 ft on Friday, primarily over the outer Coastal Waters. The flow will turn offshore over the weekend and continue into early next week. 33 Hydrology No river flooding is expected during the next seven days. NOAA Seattle WA Office: Watches - Warnings - Advisories WA...Winter Weather Advisory until 4am PST Friday for Cascades of Snohomish and Northern King Counties-Cascades of Whatcom and Skagit Counties. PZ...Small Craft Advisory until 4am PST Thursday for Central U.S. Waters Strait Of Juan De Fuca- East Entrance U.S. Waters Strait Of Juan De Fuca- West Entrance USA Waters Strait Of Juan De Fuca. Small Craft Advisory until 4am PST Thursday for Coastal Waters From Cape Flattery To James Island 10 To 60 Nm- Coastal Waters From Cape Flattery To James Island Out 10 Nm- Coastal Waters From James Island To Point Grenville 10 To 60 Nm- Coastal Waters From James Island To Point Grenville Out 10 Nm. |
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