Friday, December13, 2019
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Marine Weather and Tides
Neptune Beach, FL

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:11AMSunset 5:27PM Friday December 13, 2019 3:40 PM EST (20:40 UTC) Moonrise 7:00PMMoonset 8:30AM Illumination 95% Phase: Waning Gibbous; Moon at 17 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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AMZ452 Expires:201912140900;;733070 Fzus52 Kjax 132005 Cwfjax Coastal Waters Forecast For Northeast Florida/southeast Georgia National Weather Service Jacksonville Fl 305 Pm Est Fri Dec 13 2019 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. Amz450-452-454-140900- 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- 305 Pm Est Fri Dec 13 2019
.small craft exercise caution...
Tonight..Southwest winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Inland waters a moderate chop. Showers and a chance of Thunderstorms.
Saturday..West winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 8 seconds. Inland waters choppy. A chance of showers and a slight chance of Thunderstorms.
Saturday night..Northwest winds 15 to 20 knots. Seas 2 to 4 feet. Dominant period 9 seconds. Inland waters a moderate chop.
Sunday..North winds 5 to 10 knots becoming east northeast in the afternoon. Seas 2 to 3 feet. Dominant period 9 seconds. Inland waters a light chop.
Sunday night..Southeast winds 5 to 10 knots. Seas 2 to 4 feet. Dominant period 9 seconds. Inland waters a light chop.
Monday..South southeast winds 10 to 15 knots. Seas 2 to 4 feet. Dominant period 9 seconds. Inland waters a light chop.
Monday night..South southwest winds 10 to 15 knots. Seas 2 to 4 feet.
Tuesday..West southwest winds around 10 knots. Seas 2 to 4 feet. Showers likely and a slight chance of Thunderstorms.
Tuesday night..Northwest winds 15 to 20 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Showers likely and a slight chance of Thunderstorms.
Wednesday..North winds 20 to 25 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. A chance of showers.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 305 Pm Est Fri Dec 13 2019
Synopsis.. Strong southwest winds tonight will become more westerly in the wake of a cold front Saturday morning. A strong pressure gradient along this front will continue small craft conditions over our offshore waters through Saturday afternoon, possibly into the overnight period. After that, we'll have a brief quiet period with winds around 10 knots through Tuesday until another front approaches the area mid-week.
Gulf stream.. The approximate location of the west wall of the gulf stream as of dec 12, 2019 at 1200 utc... 64 nautical miles east northeast of flagler beach. 64 nautical miles east northeast of saint augustine beach. 71 nautical miles east of jacksonville beach. 99 nautical miles east of st simons island. This data courtesy of the naval oceanographic office.


7 Day Forecast for Marine Location Near Neptune Beach, FL
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location: 30.31, -81.43     debug


Area Discussion for - Jacksonville, FL
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FXUS62 KJAX 131801 AFDJAX

Area Forecast Discussion National Weather Service Jacksonville FL 101 PM EST Fri Dec 13 2019

AVIATION. [Through 18Z Saturday]

Low stratus and fog expected along with showers with embedded thunderstorms this afternoon. A break in the showers is anticipated this evening, but the low conditions will persist. A cold front will bring a round of strong to severe storms during the night. Conditions will slowly improve Saturday morning.

PREV DISCUSSION [935 AM EST].

NEAR TERM [Through Tonight].

Today . Warm front currently lifting northward through NE FL early this morning will be the focus of rainfall with isolated embedded storms possible as it moves into SE GA later this morning, then current shortwave energy over the NE GOMEX will track from the SW across this feature and push some fashion of broken squall line from west to east across SE GA/NE FL during the afternoon hours. Trying to nail down any specific area with strong/severe threat this afternoon will be tough and depends on how far warm front makes it northward and allows for warm sector destabilization. Max temps will range widely from the lower/middle 60s across SE GA closer to frontal boundary to lower/middle 70s across NE FL in the warm sector. Overall 12 hour rainfall chances today easily close to 80-100% for all areas, but areas in the warm sector across NE FL may see longer periods without rainfall as warm front lifts into SE GA. Locally heavy rainfall today appears more on track for SE GA as warm front focuses on this area as shortwave energy aloft pushes into the region.

Tonight . Digging mid/upper level trough into the SE US will acquire a negative tilt as significant piece of energy digs into the base of the trof later tonight. This will allow for a developing low pressure center on the frontal boundary over the FL panhandle that will track E-NE across south GA through the overnight hours and is rather intense for mid-December and higher res models such as the Downscaled NAM to 2.5 km is showing a significant squall line tracking across SE GA and into NE FL from the 06z-12z time frame (overnight hours) and is likely some of reason why SPC has introduced a Slight Risk of Severe Storms for much of the region as the warm sector from most of SE GA and into NE FL will allow for surface based storms and potential strong to severe wind gusts as this feature pushes through along with the risk for isolated tornadoes. The GFS/ECMWF are not quite as robust as the NAM with this feature on the latest model runs and will need to be monitored for better agreement. Overall expect locally heavy rainfall to accompany this squall line as well and still expect rainfall totals of 1-3 inches across SE GA and 0.50 to 1.50 inches across NE FL. Temps will generally remain steady in the 50s across SE GA and 60s across NE FL for most of the night ahead of the squall line with a slight decrease to around 50 degrees for SE GA behind the squall line towards morning.

SHORT TERM [Saturday Through Sunday].

Some rain showers may linger Saturday morning as a cold front exits the region. Dry conditions prevail as high pressure settles over the region for the weekend. Temperatures begin to warm as developing southerly flow starts advecting warmer air to the area late Sunday. Over the weekend, highs will generally range from the upper 60s across southeast Georgia to the low 70s across northeast Florida.

LONG TERM [Monday Through Thursday].

The warming trend continues for the beginning of the week with high pressure overhead. Temperatures rise well above climo with highs peaking in the mid to upper 70s with the potential for our southern counties to reach 80. On Tuesday, the next round of rain moves through ahead of a cold front. Behind the cold front, a colder, drier air mass moves into the area. Temperatures drop below climo til the end of the work week. Overnight lows on Wednesday and Thursday will range from the 30s inland to the 40s along the coast.

MARINE.

ENE winds over the GA waters just north of lifting warm front this morning were near 15 kts at Grays Reef buoy 41008 early this morning with combined seas 6-7 ft. Winds over FL waters were veering SSE trailing warm frontal boundary lifting northward with winds generally 10-15 kts. Front is expected to drift northward and linger over or just north of our GA waters this afternoon. Winds will steadily veer more southerly into the afternoon with decreasing speeds to near 10 kts over nearshore waters to 10-15 kts for all offshore waters with gradually decreasing wave heights. Small Craft Advisory (SCA) for nearshore waters is expected to be downgraded to a Small Craft Exercise Caution this afternoon with a continued SCA for the outer waters through Saturday due to elevated seas and stronger post-frontal winds. Waves of showers and t'storms will impact the adjacent waters through early Saturday morning, with clearing conditions through midday Sat and a dry rest of the weekend.

Rip Currents & Surf: Dangerous surf conditions continue today with a high rip current risk and large, rough surf with breakers of 4-7 ft reported along the local coast. A high surf advisory (breakers of > 7 ft) remains in effect for NE FL beaches today. Waves and winds will decrease through the day as flow becomes more southerly.

HYDROLOGY.

Morning high tide on track to peak just shy Action Stage at coastal tide gages.

PRELIMINARY POINT TEMPS/POPS.

AMG 50 65 42 67 47 / 100 10 0 0 0 SSI 57 67 46 66 53 / 90 20 0 0 0 JAX 58 71 46 70 51 / 90 20 0 0 0 SGJ 61 72 48 69 54 / 80 30 0 0 0 GNV 59 71 46 71 50 / 90 30 0 0 0 OCF 61 73 46 72 50 / 100 30 0 0 0

JAX WATCHES/WARNINGS/ADVISORIES. FL . High Rip Current Risk through late tonight for Coastal Duval- Coastal Flagler-Coastal Nassau-Coastal St. Johns.

High Surf Advisory until 4 PM EST this afternoon for Coastal Duval-Coastal Flagler-Coastal Nassau-Coastal St. Johns.

GA . High Rip Current Risk through late tonight for Coastal Camden- Coastal Glynn.

AM . Small Craft Advisory until 4 PM EST Saturday 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.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LTJF1 5 mi53 min 62°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 6 mi53 min NE 9.9 G 11 61°F 64°F1012.1 hPa
BLIF1 8 mi53 min SW 1 G 2.9 69°F 1012.8 hPa69°F
DMSF1 9 mi53 min 64°F
NFDF1 12 mi53 min Calm G 1.9 63°F 1013.1 hPa
FRDF1 - 8720030 - Fernandina Beach, FL 25 mi53 min N 2.9 G 5.1 65°F 62°F1012.8 hPa
41117 28 mi41 min 67°F6 ft
41112 - Offshore Fernandina Beach, FL (132) 29 mi41 min 62°F5 ft
SAUF1 - St. Augustine, FL 33 mi41 min WSW 6 G 9.9 74°F 66°F1011.7 hPa (-2.2)
GTXF1 - Guana Tolomato Matanzas Reserve, FL 46 mi56 min SSW 4.1 74°F 1013 hPa69°F

Wind History for I-295 Bridge, St Johns River, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Jacksonville Craig Municipal Airport, FL5 mi48 minNNE 45.00 miLight Rain Fog/Mist70°F68°F93%1011.6 hPa
Mayport Naval Station - Adm David L. McDonald Field, FL6 mi49 minNE 87.00 miLight Rain62°F60°F93%1011.8 hPa
Jacksonville Naval Air Station, FL14 mi48 minNW 410.00 miLight Rain69°F66°F90%1011.5 hPa
Jacksonville International Airport, FL19 mi1.7 hrsW 49.00 miLight Drizzle67°F64°F91%1011.9 hPa
Fernandina Beach Municipal Airport, FL21 mi46 minN 53.50 miFog/Mist63°F0°F%1011.8 hPa
Northeast Florida Regional Airport, FL24 mi45 minSSW 510.00 miMostly Cloudy74°F66°F79%1011.8 hPa

Link to 5 minute data for KCRG

Wind History from CRG (wind in knots)
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NE8NE5N3CalmE3SE5E3E5SE8SE8S63S5W4SW7SW4N5NE4
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2 days agoSW12SW6SE5SE3SE3CalmCalmCalmCalmSW3S4NW3CalmW4N14
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Tide / Current Tables for Pablo Creek, ICWW bridge, St. Johns River, Florida
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Pablo Creek
Click for Map
Fri -- 03:35 AM EST     -0.19 feet Low Tide
Fri -- 07:13 AM EST     Sunrise
Fri -- 08:29 AM EST     Moonset
Fri -- 10:25 AM EST     4.48 feet High Tide
Fri -- 04:25 PM EST     0.02 feet Low Tide
Fri -- 05:26 PM EST     Sunset
Fri -- 06:59 PM EST     Moonrise
Fri -- 10:45 PM EST     3.67 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.71.60.5-0.1-0.10.31.22.33.34.14.44.43.82.81.60.60.10.10.61.42.33.13.63.7

Tide / Current Tables for St. Johns River Entrance, Florida Current
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St. Johns River Entrance
Click for Map
Fri -- 12:58 AM EST     -2.06 knots Max Ebb
Fri -- 04:45 AM EST     0.00 knots Slack
Fri -- 07:13 AM EST     Sunrise
Fri -- 07:42 AM EST     2.61 knots Max Flood
Fri -- 08:29 AM EST     Moonset
Fri -- 10:56 AM EST     -0.00 knots Slack
Fri -- 01:32 PM EST     -2.27 knots Max Ebb
Fri -- 05:25 PM EST     Sunset
Fri -- 05:49 PM EST     0.00 knots Slack
Fri -- 06:59 PM EST     Moonrise
Fri -- 08:09 PM EST     1.65 knots Max Flood
Fri -- 11:01 PM EST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.7-2.1-1.8-1.3-0.70.31.42.42.621.1-0.1-1.4-2.2-2.2-1.9-1.4-0.80.21.11.61.40.80

Weather Map
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wmap_A
GEOS Local Image of Southeast    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
Wind Forecast for Jacksonville, FL (15,3,4,5)
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Ground Weather Radar Station Jacksonville, FL
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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.