Wednesday, January20, 2021
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Marine Weather and Tides
Crescent Beach, FL

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:18AMSunset 5:53PM Wednesday January 20, 2021 1:41 AM EST (06:41 UTC) Moonrise 12:01PMMoonset 12:09AM Illumination 43% Phase: First Quarter Moon; Moon at 7 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:202101201030;;184184 Fzus52 Kjax 200024 Cwfjax Coastal Waters Forecast For Northeast Florida/southeast Georgia National Weather Service Jacksonville Fl 724 Pm Est Tue Jan 19 2021 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. Amz450-452-454-201030- 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- 724 Pm Est Tue Jan 19 2021
Tonight..South winds 5 to 10 knots, becoming west southwest 10 to 15 knots late in the night. Seas 1 to 2 feet with a dominant period of 9 seconds. Becoming a light chop on the intracoastal waters.
Wednesday..West winds 10 to 15 knots, becoming northwest around 10 knots in the afternoon. Seas 2 to 3 feet with a dominant period of 9 seconds. A light chop on the intracoastal waters.
Wednesday night..Northwest winds 5 to 10 knots. Seas 1 to 2 feet with a dominant period of 9 seconds. Mostly smooth on the intracoastal waters.
Thursday..Southwest winds around 10 knots. Seas 1 to 2 feet. A light chop on the intracoastal waters.
Thursday night..Southwest winds around 15 knots. Seas 2 to 3 feet. A moderate chop on the intracoastal waters. Chance of showers after midnight.
Friday..West winds around 10 knots. Seas 2 to 3 feet. A light chop on the intracoastal waters. Chance of showers.
Friday night..West winds 5 to 10 knots, becoming northwest 10 to 15 knots after midnight. Seas 1 to 2 feet. Chance of showers.
Saturday..North winds 10 to 15 knots. Seas 2 to 3 feet. Slight chance of showers.
Saturday night and Sunday..Northeast winds 10 to 15 knots. Seas 3 to 4 feet. Slight chance of showers.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 724 Pm Est Tue Jan 19 2021
Synopsis.. High pressure centered over the northeast florida waters this evening will sink southward on Wednesday as a weak and dry cold front passes southward through our region during the afternoon hours. Weak low pressure developing over texas late on Thursday will move rapidly eastward across the deep south on Friday, resulting in strengthening west southwesterly winds over our local waters on Thursday night. This low pressure center will then move across the southeast georgia waters on Friday evening, pushing a cold front and showers into our region. This cold front will move south of our local waters by early Saturday, with winds becoming onshore by Saturday evening as high pressure shifts southeastward from the upper midwest into the ohio valley. High pressure will then Wedge down the southeastern seaboard as it weakens on Sunday, and a warm front will then lift northward from the florida peninsula by Sunday night.
Gulf stream.. The approximate location of the west wall of the gulf stream as of jan 16, 2021 at 1200 utc... 58 nautical miles east of flagler beach. 63 nautical miles east of saint augustine beach. 71 nautical miles east of jacksonville beach. 92 nautical miles east southeast of st simons island. This data courtesy of the naval oceanographic office.


7 Day Forecast for Marine Location Near Crescent Beach, FL
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location: 29.72, -81.24     debug


Area Discussion for - Jacksonville, FL
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FXUS62 KJAX 200520 AFDJAX

Area Forecast Discussion National Weather Service Jacksonville FL 1220 AM EST Wed Jan 20 2021

AVIATION. [Through 06Z Thursday]

VFR conditions will prevail at the regional terminals. Light surface winds overnight will become west-northwesterly and will be sustained at 5-10 knots after 15Z Wednesday.

PREV DISCUSSION [819 PM EST].

NEAR TERM. /through Wednesday/ .

High pressure overhead this afternoon will move toward the west northwest Tonight, as a few weak cold fronts move southeast across region Tonight into Wednesday. Little moisture with these features, so precipitation is not expected, although more clouds than Today are expected.

A milder night is expected Tonight, with lows ranging from the upper 30s over the Suwannee valley to the lower to mid 40s elsewhere. Highs Wednesday will reach above average readings in the mid to upper 60s over SE GA, and upper 60s to lower 70s for NE FL.

SHORT TERM. /Wednesday night through Saturday/ .

High pressure will build overhead Wednesday night, then to the south Thursday into Friday. A warm front will extend east across the southern US into central GA late Thursday. This boundary will sink south into SE GA Thursday night through Friday, increasing coverage of showers.

Main area of low pressure will move east along the frontal boundary Friday afternoon and evening, with its associated cold front moving south across NE FL Friday night into Saturday morning. As the low moves through, precipitation chances are expected to increase. Best moisture will move to the east of the area Friday night with the low, leaving more limited moisture and lower precipitation chances as the cold front moves through NE FL.

The front will stall and dissipate just to the south during the day Saturday, as high pressure builds to the north northeast. An inverted coastal trough is expected to develop in the onshore flow created by the high Saturday, which will produce the potential for a few coastal showers.

Temperatures Wednesday night into Thursday will average near to a little above normal, with readings well above normal for Thursday night.

A fairly wide range in temperatures expected for Friday into Friday night, due to the position of the frontal boundary. With the front just to the south Saturday, an even greater temperature gradient anticipated, which could be as much as 15 degrees. While much of the area will experience below normal highs, areas south of a line from GNV to SGJ will be above normal.

LONG TERM. /Saturday night through Tuesday/ .

Inverted trough will continue through Saturday night into Sunday, with the potential for coastal showers. As the high pressure builds more to the east on Sunday night, the coastal trough will dissipate, yielding an increasingly warm southerly flow. The high will build more toward the southeast Sunday night through Monday, keeping the warm southerly flow going.

The high will sink further to the southeast Monday night into Tuesday, allowing a cold front to approach the area from the northwest Monday night, then move into area Tuesday. Models are depicting this system to be a dissipating front as it moves through, with lower end precipitation chances.

Due to onshore flow Saturday night and Sunday night low will trend above normal, while Sunday highs trend closer to average. Warm advection is expected to keep readings above normal Monday into Tuesday.

MARINE.

High pressure centered over the northeast Florida waters this evening will sink southward on Wednesday as a weak and dry cold front passes southward through our region during the afternoon hours. Northwesterly winds will increase to around 15 knots for the offshore waters on Wednesday afternoon, with seas building to 3-4 feet, while 2-3 foot seas prevail near shore.

Weak low pressure developing over Texas late on Thursday will move rapidly eastward across the Deep South on Friday, resulting in strengthening west southwesterly winds over our local waters on Thursday night. Speeds will increase to just under Small Craft Advisory levels offshore on Thursday night and just under Caution levels near shore. This low pressure center will then move across the southeast Georgia waters on Friday evening, pushing a cold front and showers into our region. This cold front will move south of our local waters by early Saturday, with winds becoming onshore by Saturday evening as high pressure shifts southeastward from the Upper Midwest into the Ohio Valley. High pressure will then wedge down the southeastern seaboard as it weakens on Sunday, and a warm front will then lift northward from the Florida peninsula by Sunday night. This front will be accompanied by increasing mid- level cloudiness, followed by clearing skies from north to south during the afternoon hours as flow aloft veers to northwesterly. Highs will finally climb to above late January climatology tomorrow, with mid 60s near the Altamaha River, ranging to the lower 70s in north central FL.

Rip Currents: A low risk will continue at area beaches through at least Friday due to prevailing offshore winds and low wave heights.

FIRE WEATHER.

Breezy northwesterly transport winds are expected for locations along and north of the Interstate 10 corridor on Wednesday morning, with speeds gradually diminishing during the afternoon hours. A dry air mass will persist across our region, with minimum relative humidity values falling to 30-35 percent at most locations. Dispersion values will remain marginally low across north central FL, where lighter west-northwesterly surface and transport winds will prevail throughout the day.

PRELIMINARY POINT TEMPS/POPS.

AMG 66 41 64 54 61 / 0 0 0 60 70 SSI 67 44 64 54 63 / 0 0 0 40 70 JAX 70 42 68 55 67 / 0 0 0 30 50 SGJ 70 46 69 54 70 / 0 0 0 10 30 GNV 70 43 70 52 72 / 0 0 0 10 20 OCF 71 44 72 52 74 / 0 0 0 0 10

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
GTXF1 - Guana Tolomato Matanzas Reserve, FL 4 mi116 min WSW 1 41°F 1029 hPa40°F
SAUF1 - St. Augustine, FL 10 mi41 min NNW 1.9 G 1.9 55°F 59°F1027.5 hPa (-1.0)48°F
41117 21 mi45 min 60°F1 ft
LTJF1 47 mi59 min 49°F 45°F
JXUF1 48 mi53 min 54°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 48 mi53 min SW 4.1 G 4.1 48°F 57°F1027.5 hPa
BLIF1 49 mi59 min WSW 2.9 G 2.9 48°F 1028.5 hPa48°F
DMSF1 49 mi53 min 56°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, FL18 mi45 minN 010.00 miFair41°F39°F93%1027.5 hPa

Link to 5 minute data for KSGJ

Wind History from SGJ (wind in knots)
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Last 24hrW3W4CalmCalmNW4CalmN4NW3N4NE8N9NE8NE7E7E5E5E3CalmCalmCalmCalmCalmCalmCalm
1 day agoSW3W4SW4W5W5W5W4W6NW8N6W6W9W13W11
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W8NW3CalmNW3CalmCalmCalmNW4NW3
2 days agoCalmCalmCalmW3CalmW3W3W5NW5N6NW5W9
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SW9W9W5W3SW3SW3SW3W6W5W4W4

Tide / Current Tables for St. Augustine Beach, Florida (2)
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St. Augustine Beach
Click for Map
Wed -- 12:09 AM EST     Moonset
Wed -- 12:56 AM EST     4.40 feet High Tide
Wed -- 07:20 AM EST     Sunrise
Wed -- 07:25 AM EST     1.11 feet Low Tide
Wed -- 12:00 PM EST     Moonrise
Wed -- 01:14 PM EST     4.22 feet High Tide
Wed -- 04:03 PM EST     First Quarter
Wed -- 05:52 PM EST     Sunset
Wed -- 07:45 PM EST     0.80 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.24.44.23.62.82.11.51.11.21.72.43.23.94.24.13.62.92.11.40.90.81.21.92.8

Tide / Current Tables for St. Augustine Beach, Florida
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St. Augustine Beach
Click for Map
Wed -- 12:09 AM EST     Moonset
Wed -- 01:02 AM EST     3.89 feet High Tide
Wed -- 07:20 AM EST     Sunrise
Wed -- 07:27 AM EST     0.74 feet Low Tide
Wed -- 12:00 PM EST     Moonrise
Wed -- 01:20 PM EST     3.58 feet High Tide
Wed -- 04:03 PM EST     First Quarter
Wed -- 05:52 PM EST     Sunset
Wed -- 07:40 PM EST     0.42 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.63.93.73.12.41.71.10.80.81.21.92.63.23.63.532.31.610.50.40.81.52.4

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station




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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 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.