Marine Weather and Tide Forecast for Sudden Valley, WA
![]() | Sunrise 6:10 AM Sunset 8:07 PM Moonrise 5:53 AM Moonset 11:02 PM |
Marine Forecasts
NOTE: Zones updated 4/16/2026. Some zones changed. Use Edit if needed.
PZZ133 Northern Inland Waters Including The San Juan Islands- 125 Am Pdt Sun Apr 19 2026
Today - N wind around 5 kt, backing to nw this afternoon. Waves around 1 ft or less.
Tonight - NW wind 5 to 10 kt, becoming W after midnight. Waves around 2 ft or less.
Mon - N wind around 5 kt, backing to nw in the afternoon. Waves around 1 ft or less.
Mon night - SW wind around 5 kt, backing to S after midnight. Waves around 1 ft or less.
Tue - S wind 5 to 10 kt, veering to sw in the afternoon. Waves around 2 ft or less. A chance of rain in the afternoon.
Tue night - SW wind around 5 kt. Waves around 1 ft or less.
Wed - W wind around 5 kt. Waves around 1 ft or less. A chance of rain in the morning.
Wed night - S wind around 5 kt. Waves around 1 ft or less.
Thu - SE wind around 5 kt, veering to sw in the afternoon. Waves around 1 ft or less.
Thu night - SW wind around 5 kt, backing to S after midnight. Waves around 1 ft or less.
PZZ100 125 Am Pdt Sun Apr 19 2026
Synopsis for the northern and central washington coastal and inland waters - Low pressure will track south over the offshore waters today with offshore flow over western wa into Monday. Onshore flow resumes on Tuesday as the low weakens further and shift inland. Seas will build over 10 ft on Wednesday over the outer coastal waters.
7 Day Forecast for Marine Location Near Sudden Valley, WA

NEW! Add second zone forecast
| Bellingham Click for Map Sun -- 12:42 AM PDT 5.18 feet Low Tide Sun -- 05:51 AM PDT 8.45 feet High Tide Sun -- 06:11 AM PDT Sunrise Sun -- 06:54 AM PDT Moonrise Sun -- 01:12 PM PDT -2.40 feet Low Tide Sun -- 08:07 PM PDT Sunset Sun -- 08:45 PM PDT 8.50 feet High Tide Tide / Current data from XTide NOT FOR NAVIGATION |   |
Bellingham, Bellingham Bay, Washington, Tide feet
| 12 am |
| 5.3 |
| 1 am |
| 5.2 |
| 2 am |
| 5.8 |
| 3 am |
| 6.7 |
| 4 am |
| 7.5 |
| 5 am |
| 8.2 |
| 6 am |
| 8.4 |
| 7 am |
| 8 |
| 8 am |
| 6.7 |
| 9 am |
| 4.8 |
| 10 am |
| 2.4 |
| 11 am |
| 0.1 |
| 12 pm |
| -1.6 |
| 1 pm |
| -2.4 |
| 2 pm |
| -2 |
| 3 pm |
| -0.6 |
| 4 pm |
| 1.2 |
| 5 pm |
| 3.3 |
| 6 pm |
| 5.4 |
| 7 pm |
| 7.2 |
| 8 pm |
| 8.3 |
| 9 pm |
| 8.5 |
| 10 pm |
| 8.1 |
| 11 pm |
| 7.3 |
| Huckleberry Island Click for Map Flood direction 6 true Ebb direction 253 true Sun -- 04:17 AM PDT 0.38 knots Max Flood Sun -- 06:11 AM PDT Sunrise Sun -- 06:30 AM PDT -0.00 knots Slack Sun -- 06:55 AM PDT Moonrise Sun -- 08:55 AM PDT -1.23 knots Max Ebb Sun -- 11:26 AM PDT 0.00 knots Slack Sun -- 05:44 PM PDT 1.64 knots Max Flood Sun -- 08:07 PM PDT Sunset Sun -- 10:05 PM PDT -0.00 knots Slack Sun -- 11:01 PM PDT -0.44 knots Max Ebb Tide / Current data from XTide NOT FOR NAVIGATION |   |
Huckleberry Island, 0.5 mi north of, Rosario Strait, Washington Current, knots
| 12 am |
| 0.1 |
| 1 am |
| 0.2 |
| 2 am |
| 0.3 |
| 3 am |
| 0.3 |
| 4 am |
| 0.4 |
| 5 am |
| 0.3 |
| 6 am |
| 0.2 |
| 7 am |
| -0.4 |
| 8 am |
| -1 |
| 9 am |
| -1.2 |
| 10 am |
| -1 |
| 11 am |
| -0.4 |
| 12 pm |
| 0.2 |
| 1 pm |
| 0.6 |
| 2 pm |
| 0.9 |
| 3 pm |
| 1.2 |
| 4 pm |
| 1.5 |
| 5 pm |
| 1.6 |
| 6 pm |
| 1.6 |
| 7 pm |
| 1.4 |
| 8 pm |
| 1 |
| 9 pm |
| 0.5 |
| 10 pm |
| 0 |
| 11 pm |
| -0.4 |
Area Discussion for Seattle, WA
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FXUS66 KSEW 190402 AFDSEW
Area Forecast Discussion National Weather Service Seattle WA 902 PM PDT Sat Apr 18 2026
UPDATE
Satellite imagery shows large upper level low in the Eastern Pacific drifting south tonight. Stalled front offshore throwing middle level clouds over the area. Doppler radar has some light showers over San Juan and Whatcom county but with ceilings near 10,000 feet most of the precipitation is not reaching the ground.
Upper level low continuing to move south tonight and Sunday pulling the offshore front away from the coast. Warm southerly flow aloft over Western Washington combined with increasing low level offshore flow will give the area well above normal high temperatures Sunday, upper 60s to mid 70s. No records in the forecast although the coast will get within a couple of degrees of record highs. It was on this day ( the 18th ) ten years ago Seattle recorded the warmest April day on record with a high of 89 degrees. Ten years ago tomorrow Seattle recorded a high of 84 degrees, the 3rd warmest April day on record ( if you are wondering the 2nd warmest day was 85 degrees April 30, 1976 ).
Little change on Monday with the low starting to move east off the Northern California coast. Monday temperatures will be similar to Sunday with the exception of a little cooling along the coast.
Current forecast on track. No update this evening. Previous discussion follows with updated aviation section. Felton
SYNOPSIS
Mostly dry and mild conditions will continue into early next week, before chances for precipitation increase across western Washington through the middle of the week. Drying and warming conditions may return by next weekend.
SHORT TERM /TONIGHT THROUGH MONDAY NIGHT/
Upper level ridging will continue over western Washington allowing for warmer and drier conditions throughout the rest of the weekend. High temperatures this afternoon have been generally in the upper 60s with some locations closer to the foothills in the low 70s. Some mid to high clouds have been streaming in overhead with a mix of sun. Progressing into Sunday, generally the same set up with temperatures a touch warmer across much of the area with likely the warmest temperatures we've seen this year thus far with temps in the mid 70s, even upper 70s for locations in the Cascade foothills. The same weather trend will continue into Monday, with more places seeing low to mid 70s - with areas along the water seeing more upper 60s.
LONG TERM /TUESDAY THROUGH SATURDAY/
An upper level low will move inland near Oregon which could allow wrap around moisture through Washington. Precipitation chances start to increase more so Tuesday into Wednesday as the low moves further inland. Temperatures look to return to normal during this time, in the upper 50s to lower 60s. Some ensembles are starting to key into warmer and drier conditions returning near the end of the week and into the weekend, potentially back in the upper 60s to lower 70s.
Mazurkiewicz
AVIATION
High pressure over the region today will shift east on Sunday, while low pressure tracks south offshore. Winds aloft are west to southwest. Light NE to variable winds overnight. WNW to NE winds increase Sunday afternoon to 5-7 kt. Overall, mainly a mix of mid and high clouds over the area with VFR conditions. 33/29
KSEA...VFR conditions will prevail tonight through Sunday. Light NNE winds tonight. Winds increase out of the WNW Sunday afternoon to 5-7 kt. 33/29
MARINE
Light winds over the waters with high pressure. Low pressure will track south over the offshore waters on Sunday with offshore flow over western WA. Onshore flow resumes on Tuesday as the low weakens further then shifts inland. Seas will build over 10 ft on Wednesday over the outer coastal waters. 33
HYDROLOGY
River flooding is not expected over the next 7 days.
SEW WATCHES/WARNINGS/ADVISORIES
WA...None.
PZ...None.
Area Forecast Discussion National Weather Service Seattle WA 902 PM PDT Sat Apr 18 2026
UPDATE
Satellite imagery shows large upper level low in the Eastern Pacific drifting south tonight. Stalled front offshore throwing middle level clouds over the area. Doppler radar has some light showers over San Juan and Whatcom county but with ceilings near 10,000 feet most of the precipitation is not reaching the ground.
Upper level low continuing to move south tonight and Sunday pulling the offshore front away from the coast. Warm southerly flow aloft over Western Washington combined with increasing low level offshore flow will give the area well above normal high temperatures Sunday, upper 60s to mid 70s. No records in the forecast although the coast will get within a couple of degrees of record highs. It was on this day ( the 18th ) ten years ago Seattle recorded the warmest April day on record with a high of 89 degrees. Ten years ago tomorrow Seattle recorded a high of 84 degrees, the 3rd warmest April day on record ( if you are wondering the 2nd warmest day was 85 degrees April 30, 1976 ).
Little change on Monday with the low starting to move east off the Northern California coast. Monday temperatures will be similar to Sunday with the exception of a little cooling along the coast.
Current forecast on track. No update this evening. Previous discussion follows with updated aviation section. Felton
SYNOPSIS
Mostly dry and mild conditions will continue into early next week, before chances for precipitation increase across western Washington through the middle of the week. Drying and warming conditions may return by next weekend.
SHORT TERM /TONIGHT THROUGH MONDAY NIGHT/
Upper level ridging will continue over western Washington allowing for warmer and drier conditions throughout the rest of the weekend. High temperatures this afternoon have been generally in the upper 60s with some locations closer to the foothills in the low 70s. Some mid to high clouds have been streaming in overhead with a mix of sun. Progressing into Sunday, generally the same set up with temperatures a touch warmer across much of the area with likely the warmest temperatures we've seen this year thus far with temps in the mid 70s, even upper 70s for locations in the Cascade foothills. The same weather trend will continue into Monday, with more places seeing low to mid 70s - with areas along the water seeing more upper 60s.
LONG TERM /TUESDAY THROUGH SATURDAY/
An upper level low will move inland near Oregon which could allow wrap around moisture through Washington. Precipitation chances start to increase more so Tuesday into Wednesday as the low moves further inland. Temperatures look to return to normal during this time, in the upper 50s to lower 60s. Some ensembles are starting to key into warmer and drier conditions returning near the end of the week and into the weekend, potentially back in the upper 60s to lower 70s.
Mazurkiewicz
AVIATION
High pressure over the region today will shift east on Sunday, while low pressure tracks south offshore. Winds aloft are west to southwest. Light NE to variable winds overnight. WNW to NE winds increase Sunday afternoon to 5-7 kt. Overall, mainly a mix of mid and high clouds over the area with VFR conditions. 33/29
KSEA...VFR conditions will prevail tonight through Sunday. Light NNE winds tonight. Winds increase out of the WNW Sunday afternoon to 5-7 kt. 33/29
MARINE
Light winds over the waters with high pressure. Low pressure will track south over the offshore waters on Sunday with offshore flow over western WA. Onshore flow resumes on Tuesday as the low weakens further then shifts inland. Seas will build over 10 ft on Wednesday over the outer coastal waters. 33
HYDROLOGY
River flooding is not expected over the next 7 days.
SEW WATCHES/WARNINGS/ADVISORIES
WA...None.
PZ...None.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| PBFW1 - Padilla Bay Reserve, WA | 19 mi | 39 min | E 1 | 44°F | 29.92 | 41°F | ||
| CHYW1 - 9449424 - Cherry Point, WA | 25 mi | 51 min | 29.91 | |||||
| CPMW1 | 25 mi | 51 min | NNW 1.9G | |||||
| CPNW1 | 25 mi | 51 min | NNW 1G | |||||
| FRDW1 - 9449880 - Friday Harbor, WA | 39 mi | 93 min | WSW 1G | 50°F | 49°F | 29.92 | ||
| SISW1 - Smith Island, WA | 39 mi | 29 min | W 1.9G | 50°F | 29.92 | 44°F | ||
| PTWW1 - 9444900 - Port Townsend, WA | 48 mi | 51 min | WNW 1.9G | 49°F | 29.91 |
Wind History for Cherry Point South Dock, WA
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Airport Reports
Link to 1 hour of 5 minute data for KBLI
Terminal Aerodrome Forecast (TAF) for KBLI
Wind History Graph: BLI
(wind in knots)GEOS Local Image of Pacific Northwest
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Seattle/Tacoma, WA,
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