Thursday, July9, 2020
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Marine Weather and Tides
St. Augustine Beach, FL

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:30AMSunset 8:29PM Thursday July 9, 2020 6:13 AM EDT (10:13 UTC) Moonrise 10:55PMMoonset 9:40AM Illumination 84% Phase: Waning Gibbous; Moon at 19 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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AMZ454 Expires:202007091445;;554650 Fzus52 Kjax 090641 Cwfjax Coastal Waters Forecast For Northeast Florida/southeast Georgia National Weather Service Jacksonville Fl 241 Am Edt Thu Jul 9 2020 Atlantic Coastal Waters From Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm. Seas Are Provided As A Range Of The Average Height Of The Highest 1/3 Of The Waves, Along With The Occasional Height Of The Average Highest 1/10 Of The Waves. Amz450-452-454-091445- 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- 241 Am Edt Thu Jul 9 2020
Today..West northwest winds 5 to 10 knots becoming south in the afternoon. Seas 1 to 2 feet. Dominant period 8 seconds. Inland waters a light chop. Showers and Thunderstorms likely.
Tonight..West southwest winds 5 to 10 knots. Seas 1 to 2 feet. Dominant period 8 seconds. Inland waters a light chop. A chance of showers and Thunderstorms.
Friday..West winds 5 to 10 knots becoming south in the afternoon. Seas 1 to 2 feet. Dominant period 9 seconds. Inland waters a light chop. Showers likely and a chance of Thunderstorms.
Friday night..South southwest winds 5 to 10 knots becoming west southwest after midnight. Seas 1 to 2 feet. Dominant period 9 seconds. Inland waters a light chop. A chance of showers and a slight chance of Thunderstorms.
Saturday..West southwest winds 5 to 10 knots becoming south southwest in the afternoon. Seas 1 to 2 feet. Dominant period 9 seconds. Inland waters a light chop. Showers likely and a chance of Thunderstorms.
Saturday night..Southwest winds 10 to 15 knots. Seas 2 to 3 feet. A chance of showers and a slight chance of Thunderstorms.
Sunday..South southwest winds 5 to 10 knots. Seas 2 to 4 feet. A chance of showers and Thunderstorms.
Sunday night and Monday..South southwest winds 10 to 15 knots. Seas 2 to 4 feet. A chance of showers and Thunderstorms.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 241 Am Edt Thu Jul 9 2020
Synopsis.. Low pressure off the coast of north carolina will track north through Friday as surface high pressure lingers over the central gulf of mexico. A front trailing the departing surface low will linger across the southeast region through Saturday continuing elevated rain chances and prevailing offshore flow over the local waters. A weakening surface front will approach from the west late Sunday into Monday with an increase in southerly winds.
Gulf stream.. The approximate location of the west wall of the gulf stream as of jul 09, 2020 at 1200 utc... 66 nautical miles east of flagler beach. 74 nautical miles east of saint augustine beach. 82 nautical miles east of jacksonville beach. 96 nautical miles east southeast of st simons island. This data courtesy of the naval oceanographic office.


7 Day Forecast for Marine Location Near St. Augustine Beach, FL
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location: 29.87, -81.26     debug


Area Discussion for - Jacksonville, FL
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FXUS62 KJAX 090646 AFDJAX

Area Forecast Discussion National Weather Service Jacksonville FL 246 AM EDT Thu Jul 9 2020

NEAR TERM [Through Tonight].

Similar pattern characterized by WNW steering flow continues across the area with high pressure ridging extending across the southern peninsula from the central Gulf and low pressure to our northeast tracking northward along the mid Atlantic seaboard. Elevated rain chances will continue this late morning through the afternoon. Convective pattern will start this morning with showers and isolated storms edging inland from the GOMEX. With PW between 2.1 and 2.2 inches, we should continue to see plenty of coverage of showers and storms this afternoon. While lapse rates are not conducive for severe storms, with 500 mb temps around -5, there may be a few strong thunderstorms with wind gusts of 35 to 45 mph with some heavy rain. During the early evening hours, the bulk of convection will focus east of highway 301 eastward toward the Atlantic coast where boundary mergers will be maximized through early evening. The lions share off the convection will push offshore by mid to late evening as convection propagating eastward into the adjacent Atlantic waters. After midnight, there will be a chance of an inland shower given the very moist airmass still in place, but the best focus for pre-dawn rain potential will shift back west toward the Gulf Coast region into the Suwannee Valley.


SHORT TERM [Friday Through Saturday].

Friday, the area will be located near the base of of a mid/upper level trough over the eastern US with mid/upper level ridging centered over the desert southwest and to our east over Bermuda. A departing surface low moving north along the eastern seaboard of the US will leave some weak troughing over the southeast Friday with surface high pressure over the western Gulf of Mexico and the this will allow northwest flow to preside over our area. Moisture levels will be higher on Friday than Saturday as drier air in the low levels arrives from the north in the wake of the departing low with Precipitable water levels between 2.00 to 2.20 inches. Friday will continue to feature scattered to numerous thunderstorms across the area with a threat for strong wind gusts up to 50 mph, locally heavy rainfall from any cells that train over the same areas, and frequent lightning but should keep the potential for severe storms low as the environment remains warm in the mid levels near -5 degrees celsius along with weak shear levels.

Saturday will feature some drier air aloft filtering down from the north that will reduce coverage of showers and storms over SE GA, but may help to increase the threat for strong to severe downburst winds 50 to 60 mph with thunderstorms over NE FL. The drier air aloft will lower precipitable water levels below 1.3 north and west of Waycross, but remain between 1.5 and 1.8 inches from Jacksonville southward. Therefore scattered to numerous thunderstorms to form south of Waycross over Se GA and over NE FL with help from shortwave energy swinging through the region near the base of the trough.

Temperatures will above average as high temperatures rise into the low to mid 90s Friday and the mid 90s Saturday as the drier air aloft allows plentiful daytime heating. Low temperatures on saturday will be slightly above average with lows in the upper 70s along the coast and the mid 70s inland.

LONG TERM [Sunday Through Thursday].

A pattern of mid/upper level troughing over the eastern US with ridging to our west over the southwest US and to our east near Bermuda will remain Sunday through Tuesday. Scattered Showers and storms chances will continue over NE FL with drier air aloft on Sunday and Tuesday with some higher moisture levels on Monday as a shortwave swings SE into the region within the trough. The drier air aloft will raise the potential for strong to severe downburst wind gusts up to 60 mph over the area.

The pattern will shift on Wednesday into Thursday as mid/upper level ridging moves eastward from the southwest US into the mid MS valley region. This will develop high pressure at the surface over the southeast US and moisture levels will rise as light easterly flow develops off the Atlantic. Scattered showers and storms over NE FL and SE GA are expected as this pattern allows the seabreezes to push inland and converge with high pressure to our north.

Temperatures will be slightly above normal with high temperatures in the mid 90s through Tuesday and then near normal with low 90s Wednesday into Thursday. Low temperatures will remains near to above normal in the upper 70s at the coast and low to mid 70s inland.

AVIATION. [Through 06Z Friday]

Otherwise, VFR conditions will prevail overnight with the exception brief MVFR vsby for KVQQ . Scattered to numerous showers and storms expected this afternoon, possibly starting late in the morning. Brief MVFR/local IFR restrictions may occur with any shower or thunderstorm affecting terminals this afternoon. West-northwest winds of 8 to 10 knots will prevail this late morning and afternoon. Isolated to scattered showers and storms will linger near the coastal TAF sites during the early evening, before pushing off the coast during the mid to late evening.

MARINE.

Low pressure near the North Carolina coast will track north through Friday as surface high pressure lingers over the central Gulf of Mexico. A front trailing the departing surface low will linger across the southeast region through Saturday continuing elevated rain chances and prevailing offshore flow over the local waters. Prevailing SSW winds 10-15 kts expected with combined seas generally 4 ft or less. A weakening surface front will approach from the west late Sunday into Monday with an increase southerly winds with potential Small Craft Exercise Caution conditions over the outer waters.

Rip Currents: Low risk under prevailing offshore flow.

PRELIMINARY POINT TEMPS/POPS.

AMG 90 74 93 75 95 / 60 40 70 20 50 SSI 90 76 92 78 93 / 50 40 60 20 50 JAX 93 75 94 76 95 / 60 40 70 20 60 SGJ 92 75 92 76 92 / 60 40 70 30 70 GNV 92 74 91 75 92 / 60 30 80 30 70 OCF 91 75 90 76 92 / 40 20 80 30 70

JAX WATCHES/WARNINGS/ADVISORIES. FL . None. GA . None. AM . None.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SAUF1 - St. Augustine, FL 1 mi73 min W 5.1 G 6 77°F 82°F1012.1 hPa (+0.0)76°F
41117 13 mi47 min 83°F2 ft
GTXF1 - Guana Tolomato Matanzas Reserve, FL 15 mi88 min W 1.9 76°F 1013 hPa76°F
LTJF1 37 mi55 min 78°F 75°F
JXUF1 38 mi55 min 84°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 38 mi55 min WSW 6 G 8 78°F 83°F1011.9 hPa
BLIF1 39 mi61 min W 5.1 G 8 78°F 1012.7 hPa78°F
DMSF1 39 mi55 min 84°F
NFDF1 41 mi55 min W 1.9 G 5.1 70°F 70°F

Wind History for I-295 Bridge, St Johns River, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Northeast Florida Regional Airport, FL8 mi77 minWSW 610.00 miFair76°F75°F97%1012.1 hPa

Link to 5 minute data for KSGJ

Wind History from SGJ (wind in knots)
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W10NW6W8W6W4E3S3--SW3NW3SW5SW5SW3SW4W6W5
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2 days agoS4SW5SW8S6S5S7SE13NW6CalmSE7SE6S7S7S8S7SW7SW5SW6S7SW6SW5S5S6S5

Tide / Current Tables for St. Augustine Beach, Florida (2)
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St. Augustine Beach
Click for Map
Thu -- 06:01 AM EDT     0.64 feet Low Tide
Thu -- 06:31 AM EDT     Sunrise
Thu -- 10:40 AM EDT     Moonset
Thu -- 12:01 PM EDT     4.70 feet High Tide
Thu -- 06:04 PM EDT     0.94 feet Low Tide
Thu -- 08:28 PM EDT     Sunset
Thu -- 11:55 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.34.942.91.810.611.72.73.74.44.74.53.82.81.91.20.91.21.92.83.84.6

Tide / Current Tables for East Tocoi, St. Johns River, Florida (4)
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East Tocoi
Click for Map
Thu -- 12:51 AM EDT     0.03 feet Low Tide
Thu -- 06:24 AM EDT     0.98 feet High Tide
Thu -- 06:32 AM EDT     Sunrise
Thu -- 10:41 AM EDT     Moonset
Thu -- 01:36 PM EDT     0.02 feet Low Tide
Thu -- 06:46 PM EDT     0.85 feet High Tide
Thu -- 08:30 PM EDT     Sunset
Thu -- 11:56 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.100.10.40.60.8110.90.70.50.30.1000.20.40.60.80.80.80.70.50.4

Weather Map
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wmap_A
GEOS Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Jacksonville, FL (6,6,7,8)
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Ground Weather Radar Station Jacksonville, FL
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Disclaimer:
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 numerous 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.