Marine Weather and Tides
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.
|Sunrise 5:21AM||Sunset 8:50PM||Monday May 22, 2017 2:31 PM PDT (21:31 UTC)||Moonrise 2:58AM||Moonset 3:56PM||Illumination 8%|
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|PZZ135 Puget Sound And Hood Canal- 900 Am Pdt Mon May 22 2017 |
Today..N wind to 10 kt. Wind waves 1 ft or less.
Tonight..N wind 5 to 15 kt becoming ne after midnight. Wind waves 2 ft or less.
Tue..N wind to 10 kt rising to 5 to 15 kt in the afternoon. Wind waves 2 ft or less.
Tue night..NW wind 15 to 25 kt. Wind waves 2 to 4 ft.
Wed..SW wind to 10 kt becoming S in the afternoon. Wind waves 1 ft or less.
Wed night..N wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Thu..Light wind becoming N to 10 kt. Wind waves 1 ft or less.
Fri..Light wind becoming N to 10 kt. Wind waves 1 ft or less.
|PZZ100 900 Am Pdt Mon May 22 2017 |
Synopsis for the northern and central washington coastal and inland waters..A surface ridge just offshore will maintain light onshore flow through this afternoon...then becoming moderate this evening. An approaching upper level trough will trigger a marine push on Tuesday with very strong onshore flow developing through the strait of juan de fuca with a gale expected. Onshore flow will weaken by Wednesday morning. The surface ridge will remain just offshore Wednesday through Friday allowing weak to moderate onshore flow to continue.
7 Day Forecast for Marine Location Near Normandy Park, WAHourly EDIT Help
Area Discussion for - Seattle, WA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus66 ksew 221601|
area forecast discussion
national weather service seattle wa
901 am pdt Mon may 22 2017
Synopsis Warmest days of the year for most places today with an
upper level ridge over the area. Strong onshore flow will develop
on Tuesday with an upper level trough rapidly moving toward
western washington spreading clouds into the area and bringing
cooler conditions. The upper trough will weaken and shift east
Thursday and an upper ridge will arrive next weekend.
Short term Today will be several degrees warmer than yesterday
as an upper ridge crosses the area. Highs will be mostly in the
70s coast, strait, and northern interior near the water and in the
80s elsewhere. A few record highs are possible. Mostly sunny
weather will prevail with thin high clouds at times.
The upper ridge will shift inland tonight with upper heights
beginning to fall across the region. Low clouds could reach the
coast tonight which is a little faster than currently advertised.
An upper trough will move over the pacific northwest on Tuesday.
This will induce a strong onshore push. The coast should be mostly
cloudy but the interior looks mostly sunny again on Tuesday. The
main impact from the onshore push will be too cool high temperatures
10-15 degrees on Tuesday. There will also be some windy conditions
for a few hours over the admiralty inlet area late Tuesday
afternoon and into the evening as strong west winds develop. It
looks like at least a wind advisory will be needed to for this.
An upper trough and low level onshore flow will keep things mostly
cloudy on Wednesday. There could be a few showers but nothing
significant. Highs will cool to near normal. Schneider
Long term Previous discussion... Extended models in pretty good
agreement this morning with the upper level trough over the area
on Thursday and the trough moving east Friday. Upper level ridge
offshore building into western washington for the holiday weekend.
Chance of showers on Thursday with the shower chances confined to
the cascades on Friday. Have taken the chance of showers out of
the forecast for cascades on Saturday. Extended models are
trending toward a stronger ridge Friday through the holiday
weekend. If the trend continues look for the chance of showers to
get taken out of the forecast for the lowlands on Thursday. High
temperatures will slowly warm through the period from 60s and
lower 70s on Thursday to upper 60s to near 80 by Sunday. Felton
Aviation An upper level ridge will remain over W wa today then
drift E tonight. A surface ridge just offshore will maintain weak
to moderate low level onshore flow. The air mass will remain dry
through tonight with goodVFR conditions and only high clouds
An upper level shortwave trough approaching from the NW will
trigger a marine push with strong onshore flow developing Tuesday
morning and persisting through Tuesday night, particularly
through the strait of juan de fuca. The marine push will spread|
low stratus clouds across the wa coast and through the strait for
areas of ifr conditions.
Ksea... GoodVFR today and tonight with just high clouds. Surface
winds will remain northerly 4-10 kt. Kam
Marine A surface ridge just offshore will maintain weak onshore
flow through this afternoon, becoming moderate tonight. Sca
conditions are expected to develop in the central and E strait of
juan de fuca later this evening, then persisting into Tuesday
An upper level trough approaching from the NW will trigger a very
strong marine push on Tuesday, with very strong W winds
developing through the strait of juan de fuca. Gale force winds
are expected to develop through the strait probably before midday
Tuesday. Peak winds are expected to reach 35-45 kt. However, the
06z canadian mesoscale model indicates there could be an hour or
two of storm force winds in the central and E strait late Tuesday
afternoon or early Tuesday evening.
Gale force winds are also expected to spread over adjacent waters
in the north interior and admiralty inlet Tuesday evening and
possibly Tuesday afternoon.
Onshore flow should begin weakening by late Tuesday night.
However, weaker onshore flow will persist Wednesday through
A steep fresh swell will develop off vancouver island and push
into the coastal waters later Tuesday into Wednesday. Kam
Pz... Small craft advisory from 6 pm this evening to 5 am pdt
Wednesday 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-coastal waters from
point grenville to CAPE shoalwater 10 to 60 nm-coastal
waters from point grenville to CAPE shoalwater out 10 nm.
Small craft advisory from 9 pm this evening to 9 am pdt Tuesday
for central u.S. Waters strait of juan de fuca-east
entrance u.S. Waters strait of juan de fuca.
Gale warning from 9 am Tuesday to 5 am pdt Wednesday for central
u.S. Waters strait of juan de fuca-east entrance u.S.
Waters strait of juan de fuca.
Gale watch from Tuesday afternoon through late Tuesday night for
admiralty inlet-northern inland waters including the san
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|TCMW1 - 9446482 - Tacoma Met, WA||9 mi||44 min||NW 7 G 8|
|TCNW1 - 9446484 - Tacoma, WA||10 mi||44 min||72°F||49°F||1019.8 hPa|
|EBSW1 - 9447130 - Seattle, WA||14 mi||44 min||Calm G 2.9||70°F||50°F||1019.5 hPa|
|WPOW1 - West Point, WA||19 mi||32 min||NNE 8.9 G 9.9||62°F||1019.8 hPa (-1.5)||54°F|
|46121||22 mi||5 min||5.8||67°F||1019 hPa||56°F|
|46120||25 mi||45 min||SE 12||62°F||1019.1 hPa||52°F|
Wind History for Tacoma MET, WA(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Seattle, Seattle-Tacoma International Airport, WA||3 mi||39 min||NE 9||10.00 mi||Partly Cloudy||78°F||52°F||40%||1020.2 hPa|
|Seattle, Seattle Boeing Field, WA||9 mi||39 min||Var 5||10.00 mi||Partly Cloudy||77°F||55°F||47%||1019.3 hPa|
|Renton, Renton Municipal Airport, WA||10 mi||39 min||WNW 10||10.00 mi||Fair||77°F||55°F||47%||1019.5 hPa|
|Tacoma, Tacoma Narrows Airport, WA||15 mi||39 min||NNE 7||10.00 mi||Fair||74°F||52°F||46%||1019.5 hPa|
|Tacoma / McChord Air Force Base, WA||18 mi||34 min||NNE 7||10.00 mi||Fair||77°F||54°F||45%||1019.9 hPa|
|Pierce County-Thun Field, WA||21 mi||57 min||WNW 3||10.00 mi||77°F||53°F||44%||1020.3 hPa|
|Bremerton, Bremerton National Airport, WA||23 mi||36 min||NE 9||10.00 mi||Fair||78°F||51°F||39%||1021.3 hPa|
Wind History from SEA (wind in knots)
|1 day ago||NW||NW||N|
|2 days ago||W||SW||SW||SW||W||N||N||NW||N||N||Calm||W||SW||W||Calm||Calm||SW||S||Calm||W||N||NW|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Des Moines |
Click for Map
Mon -- 02:25 AM PDT 11.80 feet High Tide
Mon -- 03:57 AM PDT Moonrise
Mon -- 05:24 AM PDT Sunrise
Mon -- 09:19 AM PDT 1.46 feet Low Tide
Mon -- 03:31 PM PDT 9.40 feet High Tide
Mon -- 04:55 PM PDT Moonset
Mon -- 08:48 PM PDT Sunset
Mon -- 09:05 PM PDT 4.10 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Skagit Bay |
Click for Map
Mon -- 12:17 AM PDT -0.00 knots Slack
Mon -- 03:21 AM PDT -1.43 knots Max Ebb
Mon -- 03:58 AM PDT Moonrise
Mon -- 05:25 AM PDT Sunrise
Mon -- 06:44 AM PDT 0.05 knots Slack
Mon -- 09:15 AM PDT 1.69 knots Max Flood
Mon -- 01:13 PM PDT -0.00 knots Slack
Mon -- 03:48 PM PDT -1.29 knots Max Ebb
Mon -- 04:55 PM PDT Moonset
Mon -- 06:50 PM PDT 0.04 knots Slack
Mon -- 08:48 PM PDT Sunset
Mon -- 09:25 PM PDT 1.65 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of PacificNorthwest EDIT
Wind Forecast for Seattle, WA (17,4,5,8)(on/off)  Help
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.