Marine Weather and Tides
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.
|Sunrise 6:54AM||Sunset 5:28PM||Saturday November 18, 2017 2:32 PM EST (19:32 UTC)||Moonrise 6:53AM||Moonset 5:59PM||Illumination 0%|
EDIT (on/off)  Help
|AMZ452 Coastal Waters From Altamaha Sound To Fernandina Beach Fl Out 20 Nm- Coastal Waters From Fernandina Beach To St. Augustine Fl Out 20 Nm- Coastal Waters From St. Augustine To Flagler Beach Fl Out 20 Nm- 209 Pm Est Sat Nov 18 2017 |
.small craft should exercise caution...
Tonight..Southwest winds increasing to 15 to 20 knots. Seas 2 to 4 feet. Dominant period 8 seconds. Inland waters becoming choppy late.
Sunday..West southwest winds 15 to 20 knots, becoming northwest in the early afternoon. Seas 2 to 4 feet. Dominant period 6 seconds. Inland waters choppy. A chance of showers in the morning. A slight chance of showers in the afternoon.
Sunday night..North winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 4 seconds. Inland waters choppy.
Monday..East northeast winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 5 seconds. Inland waters choppy.
Monday night..East winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Inland waters choppy. A slight chance of rain.
Tuesday..East southeast winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Inland waters a moderate chop. Rain and a slight chance of Thunderstorms.
Tuesday night..East northeast winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Inland waters mostly smooth. A chance of rain.
Wednesday..North northeast winds 10 to 15 knots. Seas 3 to 4 feet. Inland waters a light chop. A chance of rain and a slight chance of Thunderstorms.
Wednesday night..North northeast winds 15 to 20 knots. Seas 2 to 4 feet. Inland waters choppy. A chance of rain.
Thursday..North northwest winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Inland waters a moderate chop. A chance of rain.
|AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 209 Pm Est Sat Nov 18 2017 |
Synopsis.. A cold front will move across our coastal waters on Sunday morning, accompanied by scattered showers. Southwesterly winds will strengthen ahead of the front this evening, followed by a surge of northwesterly winds behind the front on Sunday. High pressure will build eastward from the tennessee valley to the carolina coast by Monday evening, with winds becoming onshore by early on Monday morning. A warm front will approach our waters from the south on Tuesday and Tuesday night. Low pressure is then forecast to develop over the eastern gulf of mexico on Wednesday, moving over the florida peninsula and into the atlantic waters by Thursday.
7 Day Forecast for Marine Location Near Callahan, FLHourly EDIT Help
Area Discussion for - Jacksonville, FL  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus62 kjax 181624|
area forecast discussion
national weather service jacksonville fl
1124 am est Sat nov 18 2017
Much colder temperatures expected Sunday night inland...
Late morning surface analysis depicts high pressure (1020
millibars) centered over the coastal carolinas. Strengthening low
pressure (992 millibars) was located near st. Louis and was moving
east-northeastward, dragging a cold front accelerating
southeastward through the southern plains states. Aloft... A
shortwave trough was progressing eastward through the mid-
mississippi valley, with shortwave ridging building into our
region from the western gulf of mexico. Fair skies prevail over
our area, with south-southwesterly low level flow developing and
rising heights aloft boosting temperatures into the lower 70s as
of 16z. A dry air mass prevails, with dewpoints generally in the
50s and expected to fall a few degrees this afternoon as strong
Mostly sunny skies and the existing dry air mass will boost highs
well into the 70s this afternoon, with a few inland locations
reaching 80 degrees. Our local pressure gradient will continue to
gradually tighten through tonight, with south-southwesterly
surface winds increasing to 10-15 mph this afternoon, pinning the
atlantic seabreeze to the east of interstate 95 this afternoon.
Latest high resolution, short term guidance indicates that showers
associated with the quick moving cold front will not approach the
altamaha ocmulgee rivers until after midnight tonight.
Southwesterly surface winds will remain in the 10-15 mph range
over much of inland southeast georgia overnight, keeping lows
around 60. Winds will likely not increase until the predawn hours
over northeast and north central florida, with decoupling during
the early evening allowing lows to fall into the upper 50s inland,
while a breeze continues at the coast, where lower 60s are
forecast. A broken line of showers will likely progress across
much of inland southeast georgia and the northern suwannee valley
during the predawn hours on Sunday, with winds shifting to
northwesterly around sunrise for locations near the altamaha and
Vfr conditions will prevail through at least 09z. A weak sea
breeze will develop towards 18z at sgj and ssi, with surface
winds shifting to southeasterly around 10 knots. Southwesterly
winds around 10 knots will prevail elsewhere through 00z. Low
level wind shear may develop at ssi towards 06z through around
10z, with southwesterly surface winds of 5-10 knots and west-
southwest winds increasing to around 40 knots. A shorter period of|
low level wind shear is possible at the duval county terminals
between 10z-12z Sunday before surface winds strengthen above 10
knots. A brief period of MVFR ceilings and light showers is
expected at ssi after 10z and elsewhere after 12z.
High pressure will continue to shift further eastward off the
carolina coast this afternoon, with a weak sea breeze developing
in coastal locations. Our local pressure gradient will tighten
quickly this evening as a cold front races southeastward towards
our region. Southwesterly winds will reach caution levels early
this evening over all waters, with small craft advisory (sca) wind
speeds expected offshore after midnight. The cold front will move
quickly across our local waters during the morning hours on
Sunday, accompanied by a few showers. Winds will shift to
northwesterly behind the front, with caution conditions continuing
near shore and SCA level winds expected through late afternoon
offshore. High pressure will remain centered to the north of our
waters Sunday night through Tuesday, with winds gradually shifting
to north-northeasterly on Sunday evening, east-northeasterly on
Monday, easterly on Monday night and then east-southeasterly on
Tuesday. Caution level speeds and seas are expected offshore from
Sunday night through Tuesday, with onshore winds diminishing
below caution levels near shore by Monday morning. A warm front
will approach the northeast florida waters from the south on
Tuesday night, with winds subsiding but seas remaining at caution
levels offshore through midweek.
Rip currents: a lingering long period east-northeast swell will
keep a low-end moderate risk in place today at the northeast
florida beaches, with a low risk for southeast georgia.
Preliminary point temps pops
Amg 77 60 65 36 0 30 30 0
ssi 76 62 67 46 0 20 30 0
jax 80 59 72 44 0 20 40 0
sgj 78 61 73 49 0 10 30 0
gnv 79 58 73 39 0 10 40 0
ocf 80 59 75 41 0 10 30 0
Jax watches warnings advisories
Am... Small craft advisory from 3 am to 3 pm est Sunday for waters
from altamaha sound ga to fernandina beach fl from 20 to 60
nm-waters from fernandina beach to st. Augustine fl from 20
to 60 nm-waters from st. Augustine to flagler beach fl from
20 to 60 nm.
Nelson hess corless
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|
|41112 - Offshore Fernandina Beach, FL (132)||26 mi||33 min||68°F||2 ft|
|SAUF1 - St. Augustine, FL||55 mi||33 min||ESE 8.9 G 8.9||70°F||69°F||1014.3 hPa (-3.3)|
|SAXG1 - Sapelo Island Reserve, GA||64 mi||93 min||SSW 11||77°F||1015 hPa (-2.0)||59°F|
Wind History for Fernandina Beach, FL(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Jacksonville International Airport, FL||5 mi||37 min||S 12||10.00 mi||A Few Clouds||80°F||52°F||38%||1013.4 hPa|
|Jacksonville Craig Municipal Airport, FL||20 mi||40 min||S 10||10.00 mi||A Few Clouds||78°F||53°F||42%||1013.8 hPa|
|Mayport Naval Station - Adm David L. McDonald Field, FL||20 mi||41 min||ESE 8||10.00 mi||Fair||76°F||59°F||56%||1013.7 hPa|
|Jacksonville Naval Air Station, FL||23 mi||1.7 hrs||S 10||10.00 mi||Partly Cloudy||77°F||55°F||47%||1014.7 hPa|
Wind History from JAX (wind in knots)
|1 day ago||N||NW||Calm||Calm||Calm||Calm||Calm||SW||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||N||N||NE||E||NE||E|
|2 days ago||NE||NE||NE||NE||N||NE||N||Calm||N||N||E||N||N||NW||NW||Calm||Calm||NW||N||N||N||N|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Boggy Creek |
Click for Map
Sat -- 05:44 AM EST -0.23 feet Low Tide
Sat -- 06:42 AM EST New Moon
Sat -- 06:52 AM EST Moonrise
Sat -- 06:55 AM EST Sunrise
Sat -- 12:02 PM EST 3.37 feet High Tide
Sat -- 05:27 PM EST Sunset
Sat -- 05:58 PM EST Moonset
Sat -- 06:22 PM EST -0.09 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|St. Johns River Entrance |
Click for Map
Sat -- 12:35 AM EST -2.12 knots Max Ebb
Sat -- 04:00 AM EST 0.00 knots Slack
Sat -- 06:42 AM EST New Moon
Sat -- 06:51 AM EST 2.47 knots Max Flood
Sat -- 06:51 AM EST Moonrise
Sat -- 06:53 AM EST Sunrise
Sat -- 10:06 AM EST -0.01 knots Slack
Sat -- 01:34 PM EST -2.27 knots Max Ebb
Sat -- 04:52 PM EST 0.00 knots Slack
Sat -- 05:27 PM EST Sunset
Sat -- 05:57 PM EST Moonset
Sat -- 07:22 PM EST 1.86 knots Max Flood
Sat -- 10:17 PM EST -0.00 knots Slack
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 Southeast EDIT
Wind Forecast for Jacksonville, FL (14,3,4,5)(on/off)  Help
Ad by Google
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.