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 7:17AM||Sunset 7:42PM||Monday March 27, 2017 6:34 AM EDT (10:34 UTC)||Moonrise 6:09AM||Moonset 6:26PM||Illumination 0%|
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|AMZ454 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- 308 Am Edt Mon Mar 27 2017 |
Today..South southeast winds 5 to 10 knots...becoming east southeast 10 to 15 knots during the afternoon. Seas 2 to 4 feet. Dominant period 10 seconds. Inland waters a light chop.
Tonight..South southwest winds 5 to 10 knots. Seas 2 to 4 feet. Dominant period 10 seconds. Inland waters a light chop.
Tuesday..South southwest winds 5 to 10 knots...becoming east southeast 10 to 15 knots in the afternoon. Seas 2 to 4 feet. Dominant period 10 seconds. Inland waters a light chop.
Tuesday night..Southwest winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 10 seconds. Inland waters a light chop.
Wednesday..Southwest winds 5 to 10 knots...becoming southeast 10 knots in the afternoon. Seas 2 to 4 feet. Inland waters a light chop.
Wednesday night..South winds 10 knots. Seas 2 to 3 feet. Inland waters a light chop.
Thursday..Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Inland waters a light chop.
Thursday night..South southeast winds 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Inland waters a moderate chop. A slight chance of showers and Thunderstorms.
Friday..South winds 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Inland waters a moderate chop. A chance of showers and a slight chance of Thunderstorms.
|AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 308 Am Edt Mon Mar 27 2017 |
Synopsis.. High pressure centered offshore of the carolina coast will move southward through midweek. Onshore winds today will become southerly on Tuesday and southwesterly by Wednesday. A weak cold front will move southward and stall near the georgia waters by late Wednesday. The front will lift back north as a warm front on Thursday evening ahead of an approaching cold front that will cross our waters on Friday night and early Saturday.
7 Day Forecast for Marine Location Near St. Augustine South, FLHourly EDIT Help
Area Discussion for - Jacksonville, FL  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus62 kjax 270833|
area forecast discussion
national weather service jacksonville fl
433 am edt Mon mar 27 2017
Near record highs for inland southeast georgia on Wednesday
Early morning surface analysis depicts surface ridging centered
off the mid-atlantic coast and extending southwestward across our
region. Meanwhile, low pressure (1004 millibars) was centered over
the southern plains states and was moving northeastward. Aloft... A
potent shortwave trough was centered over eastern kansas and was
progressing east-northeastward, with a vorticity lobe extending
southward through eastern texas. Zonal flow was in place
downstream of this trough across our area. A few patches of
stratocumlus clouds were migrating northward along coastal
locations, with some lingering mid-level cloudiness over our
northwestern counties. Otherwise, radiational cooling is taking
place at inland locations, with temperatures ranging from the mid
50s to the mid 60s as of 08z. Patchy fog was developing over
Near term Today through Tuesday...
patches of locally dense fog may develop through the predawn and
early morning hours. Otherwise, high pressure centered off the
eastern seaboard will weaken and sink southward as low pressure
progresses northeastward through the ozarks and into the tennessee
and ohio valley regions. Our local pressure gradient will continue
to loosen, allowing the atlantic sea breeze to develop towards
noon and push well inland through the afternoon hours. Despite
limited deep-layered moisture values in place over our region,
there is just enough instability in place for isolated showers to
develop along this sea breeze boundary as it progresses westward
across inland locations this afternoon. Although a cirrus shield
will advect into our region from the west by the late morning and
afternoon hours, plenty of insolation and a light south-southwest
low level flow will boost inland highs to the low and mid 80s.
Early development of the sea breeze will keep coastal highs in the
A weak vorticity lobe will approach inland portions of southeast
ga from the west during the evening hours. This feature may
provide enough lift for isolated thunderstorm development through
the early evening for locations to the northwest of waycross. This
activity will fade by the mid-evening hours. Low level winds will
become south-southwesterly overnight as the surface ridge axis
continues to sink southward. This weather pattern may advect low
stratus northeastward from the gulf of mexico into the suwannee
valley during the predawn hours on Tuesday, with radiation fog
also possible elsewhere as fair skies and nearly calm surface
winds prevail. Lows will only fall to the upper 50s and lower 60s.
Low stratus and fog will dissipate shortly after sunrise on
Tuesday. Shortwave troughing progressing through the ohio valley
tonight will move off the mid-atlantic coast by Tuesday
afternoon. Northwesterly flow aloft will deepen as this feature
bypasses us to the north, with heights aloft rising late in the
day as another deep trough digs into the desert southwest. Low
level flow will become southwesterly, which may delay the
development of the atlantic sea breeze until the early to mid
afternoon hours, which will allow coastal highs to climb to the
upper 70s/near 80. Inland highs will reach the mid 80s as a flat
cumulus field develops during the afternoon hours.
Short term Tue night through Thu night...
mostly dry with warm days and foggy nights as mid level ridge
amplifies over the deep south from the gulf of mexico and broad
surface high pressure extends across south florida and the
bahamas. This pattern will bring a very light ssw flow across the
region with both west and east coast sea breezes expected each
day. Indicated only a very low 20/% chance of showers near the
altamaha river basin and coastal SE ga Wed afternoon where a
washed out surface frontal boundary will drift southward and could
spark some showers as it interacts with the atlantic sea breeze.
Also advertise a low chance (20%) of showers/isolated tstorms due
to sea breeze interactions and diurnal heating Thu afternoon as
the mid/upper level ridge breaks down and shifts east of the
area... Opening up moist and unsettled ssw flow from the gulf of
mexico across the local area. Highest rain chances will focus near
the altamaha river basin where warm frontal zone will meander in
the afternoon and early evening.
Temperatures will continue above normal this period under stacked
ridging over the region with highs in the upper 80s to near 90|
inland to cooler near 80 along the atlantic coast due to the sea
breeze. Min temps will range generally in the 50s well inland to
low/mid 60s coast. Patchy inland fog is possible each night/early
Long term Fri through mon...
fri... Best chance of rainfall over the next week will be Friday
with pre-frontal showers and storms ahead of an approaching
surface cold front. Highest rain chances will be fri
morning... Then models suggest the jacksonville split in rainfall
with fading rain chances into the afternoon for areas east of
i-75 as dynamical forcing lifts NE and moisture/instability hug
the gulf coast region causing thunderstorms ingredients to become
unphased. At this time... Severe storms are not expected.
Weekend... Drier and slightly cooler this weekend but still above
normal normal temperatures. Dry NW flow funnels over the region
sat from the surface up to 500 mb as surface high pressure settles
across the upper ms river valley and a weak mid level ridge
builds across the eastern gulf of mexico. Onshore flow returns sun
into Mon as the ridge center builds ese with temperatures
continuing above climo values with mostly dry conditions.
Mon... Models diverge with the GFS still indicating dry conditions
under warm southerly flow ahead of approaching frontal
system... While ecwmf is much faster and sweeps the front and
associated rainfall across the area through Monday. At this time
trended forecast toward 20-30% chances of rainfall. Good news with
this next system is that at this time the parent upper level low
is farther south... Which translates into a greater potential for a
more widespread rainfall.
MVFR visibilities will be possible at the duval county terminals
and gnv from around 09z-13z, with periods of ifr visibilities
possible through 12z at vqq. Otherwise,VFR conditions will
prevail through Monday evening at the regional terminals. The
atlantic sea breeze will develop around noon at the coast and will
push inland through the afternoon hours. Surface winds will become
easterly by 16z at sgj, with speeds increasing to 10-15 knots
through 23z. East-southeast surface winds will develop after 17z
at the duval county terminals and ssi, with surface speeds
increasing to around 10 knots. A few brief showers will be
possible along this sea breeze boundary near vqq and gnv during
the afternoon hours.
High pressure centered off the carolina coast will drift southward
through midweek while weakening. A persistent easterly ocean swell
will keep seas elevated in the 4-6 foot range in the offshore
waters through Tuesday, and small craft should exercise caution if
venturing into the waters beyond 20 nautical miles. Our local
pressure gradient will continue to weaken, which will allow the
atlantic sea breeze to develop each afternoon this week, with
onshore winds increasing to 10-15 knots in the near shore waters.
A cold front will push southward down the southeastern seaboard on
Wednesday, but is expected to stall just north of the georgia
waters. This front will lift northward as a warm front on late
Thursday. South-southeasterly winds will strengthen on Thursday
night in advance of a cold front that will be moving eastward
through the southeastern states. Winds and seas will increase to
caution levels on Thursday evening in the offshore waters, and
near caution levels for the near shore waters. Small craft
advisory conditions will be possible offshore ahead of the front
Rip currents: a long periods easterly ocean swell will continue
through midweek at area beaches, which will result in a moderate
risk of rip currents. Breakers of 3-4 feet are expected at the
northeast florida beaches today and Tuesday.
Preliminary point temps/pops
Amg 84 61 83 61 / 20 20 10 10
ssi 74 62 78 62 / 10 0 0 0
jax 81 61 84 61 / 10 0 0 0
sgj 78 62 81 63 / 0 0 0 0
gnv 82 58 84 57 / 10 10 10 0
ocf 83 58 84 57 / 0 0 0 0
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|
|SAUF1 - St. Augustine, FL||3 mi||35 min||SW 1 G 1.9||65°F||69°F||1019.6 hPa (-0.5)|
|RCYF1||14 mi||47 min||69°F|
|GTXF1 - Guana Tolomato Matanzas Reserve, FL||15 mi||110 min||Calm||61°F||1020 hPa||60°F|
|BKBF1||30 mi||47 min||Calm G 1.9||64°F||69°F|
|LTJF1||36 mi||47 min||64°F||62°F|
|MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL||37 mi||47 min||Calm G 1||64°F||67°F||1019 hPa|
|JXUF1||37 mi||47 min||68°F|
|BLIF1||38 mi||47 min||SSW 1.9 G 2.9||65°F||1019.3 hPa||64°F|
|DMSF1||38 mi||47 min||68°F|
|NFDF1||40 mi||47 min||Calm G 1.9||65°F||1019.2 hPa|
Wind History for I-295 Bridge, St Johns River, FL(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|St. Augustine, St. Augustine Airport, FL||7 mi||37 min||N 0||10.00 mi||Fair||61°F||57°F||87%||1019 hPa|
Wind History from SGJ (wind in knots)
|1 day ago||SE||SE||SE||SE||E||E||SE||SE||E||SE||E|
|2 days ago||E||E||E||E||E||E||E||SE||E||E||E||E||E||E||SE||E||E||SE||S||E||SE||SE||SE |
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|State Road 312 |
Click for Map
Mon -- 02:48 AM EDT -0.30 feet Low Tide
Mon -- 07:08 AM EDT Moonrise
Mon -- 07:20 AM EDT Sunrise
Mon -- 09:04 AM EDT 4.91 feet High Tide
Mon -- 03:14 PM EDT -0.33 feet Low Tide
Mon -- 07:26 PM EDT Moonset
Mon -- 07:41 PM EDT Sunset
Mon -- 09:28 PM EDT 5.02 feet High Tide
Mon -- 10:59 PM EDT New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Crescent Beach |
Click for Map
Mon -- 03:47 AM EDT -0.47 feet Low Tide
Mon -- 07:08 AM EDT Moonrise
Mon -- 07:20 AM EDT Sunrise
Mon -- 09:44 AM EDT 4.37 feet High Tide
Mon -- 04:14 PM EDT -0.47 feet Low Tide
Mon -- 07:25 PM EDT Moonset
Mon -- 07:40 PM EDT Sunset
Mon -- 10:07 PM EDT 4.50 feet High Tide
Mon -- 10:59 PM EDT New Moon
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 (6,6,7,8)(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.