Cape Flattery to Cape Shoalwater WA between 60 and 150 NM Offshore Forecast
| Tonight...Nw Winds 10 To 20 Kt, Diminishing To 5 To 15 Kt. Seas 5 To 9 Ft. |
| Fri...Nw Winds Less Than 10 Kt, Becoming S. Seas 4 To 5 Ft. |
| Fri Night...S To Se Winds 5 To 15 Kt. Seas 3 To 5 Ft. |
| Sat...Se Winds 15 To 25 Kt. Seas 4 To 8 Ft. |
| Sat Night...S To Se Winds 15 To 20 Kt. Seas 5 To 8 Ft. |
| Sun...E To Se Winds 10 To 20 Kt. Seas 5 To 7 Ft. |
| Sun Night...E To Se Winds 5 To 10 Kt, Becoming Variable. Seas 5 To 8 Ft. |
| Mon...N Winds 5 To 15 Kt. Seas 6 To 7 Ft. |
| Mon Night...N Winds 10 To 20 Kt. Seas 5 To 7 Ft. |
| Tue...Nw Winds 10 To 20 Kt. Seas 5 To 7 Ft. |
| Tue Night...Nw Winds 15 To 25 Kt. Seas 6 To 10 Ft. |
| Area Forecast Discussion National Weather Service Seattle WA 256pm PDT Thu April 16 2026 Synopsis Dry, cool conditions are expected through Friday as weak ridging builds into Western Washington. The next upper low will move southwards offshore along the west coast this weekend. Temperatures will then trend warmer early next week. Short Term - Tonight Through Saturday Night Dry conditions return this afternoon with a mix of sunshine and cumulus. Temperatures will remain in the cooler side today, with highs in the 50s. Temperatures will fall again tonight into the low 30s to low 40s, with the coldest temperatures from Olympia southwards. Have issued a Frost Advisory for portions of the Southwest Interior and southern Cascade Foothills and Valleys as temperatures drop between 33 to 36 degrees. Low clouds may also develop early Fridayam which may inhibit frost development elsewhere, however, additional Frost Advisories will need to be monitored. Otherwise, weak ridging continues to build into the area on Friday resulting in dry conditions, and some sunshine. An upper low will approach the Pacific Northwest well offshore on Saturday. Dry conditions will likely continue for the majority of western Washington through Saturday afternoon. However, precipitation potential begins to increase late Saturday into Saturday night along the Olympic Peninsula with the aforementioned upper low offshore. High clouds will spread overhead on Saturday as temperatures warm into the 60s. JD Long Term - Sunday Through Thursday The upper low will slide southwards offshore Sunday into Monday. At this time, precipitation is expected to be confined to the Olympic Peninsula on Sunday, with dry conditions continuing for interior locations. Predominantly drier conditions on Monday with the upper low positioned well to the south along the northern California coast. Precipitation chances increase slightly Tuesday and Wednesday with wrap around moisture associated with the upper low as it moves inland. Ensembles then suggest drier conditions begin to prevail late next week. Temperatures will warm into the mid 60s to low 70s Sunday and Monday, with areas of minor HeatRisk across southern and central Puget Sound. Otherwise, conditions cool a few degrees for midweek. JD Marine Confidence has increased, now greater than 70%) with the latest high- resolution guidance for the westerly push through the Strait of Juan de Fuca meeting small craft criteria. Therefore, a Small Craft Advisory has been issued for the Central and Eastern portions of the Strait of Juan de Fuca. Guidance also suggests that the small craft winds push through Admiralty Inlet as and thus this marine zone has also been added to the Small Craft Advisory. High pressure will continue building over area waters through early Saturday, before it weakens later that day with the next frontal system arriving. Conditions with this system look to remain below small craft criteria at this time, with current probabilities ranging between 30- 50% of winds exceeding 21 kt for the coastal waters. Seas will build slightly this weekend and into early next week to 4-7 ft this weekend, with the highest seas over the outer coastal waters. While seas will remain below 10 ft, seas will be steep as the dominant period will be around 7 to 8 seconds. Grays Harbor bar is expected to enter a period of very strong ebb currents over the next few days. While seas will continue subsiding, seas may remain rough around the ebbs the next few mornings. 29 Hydrology No river flooding is expected over the next 7 days. NOAA Seattle WA Office: Watches - Warnings - Advisories WA...Frost Advisory from 1am to 9am PDT Friday for Foothills and Valleys of Pierce and Southern King Counties-Foothills and Valleys of Thurston and Lewis Counties-Lowlands of Lewis and Southern Thurston Counties-Middle Chehalis River Valley-Willapa and Black Hills. PZ...Small Craft Advisory from 5pm this afternoon to 3am PDT Friday for Central U.S. Waters Strait Of Juan De Fuca- East Entrance U.S. Waters Strait Of Juan De Fuca. Small Craft Advisory from 8pm this evening to 3am PDT Friday for Admiralty Inlet. |
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