Friday, January24, 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 7:16AMSunset 5:56PM Friday January 24, 2020 8:19 PM EST (01:19 UTC) Moonrise 7:15AMMoonset 5:49PM Illumination 0% Phase: New Moon; Moon at 29 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:202001250415;;456922 Fzus52 Kjax 242015 Cwfjax Coastal Waters Forecast For Northeast Florida/southeast Georgia National Weather Service Jacksonville Fl 315 Pm Est Fri Jan 24 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. Amz450-452-454-250415- 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- 315 Pm Est Fri Jan 24 2020
.small craft should exercise caution until seas subside...
Tonight..South southwest winds 10 to 15 knots, becoming west after midnight. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 10 seconds. Inland waters a light chop.
Saturday..West northwest winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 11 seconds. Inland waters a light chop.
Saturday night..Northwest winds 15 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 12 seconds. Inland waters a moderate chop.
Sunday..Northwest winds 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 11 seconds. Inland waters a light chop.
Sunday night..West winds around 5 knots. Seas 2 to 3 feet. Dominant period 10 seconds. Inland waters smooth. A chance of showers after midnight.
Monday..West winds 5 to 10 knots. Seas 2 to 3 feet. Dominant period 10 seconds. Inland waters mostly smooth. A chance of showers.
Monday night..North northwest winds 10 to 15 knots. Seas 2 to 3 feet.
Tuesday..North winds 10 to 15 knots. Seas 2 to 4 feet.
Tuesday night..North northeast winds around 5 knots. Seas 2 to 3 feet.
Wednesday..Northwest winds around 5 knots. Seas 2 to 3 feet. A chance of showers.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 315 Pm Est Fri Jan 24 2020
Synopsis.. A cold front will move through our area early this evening, resulting in winds shifting from southwesterly to westerly overnight. Elevated seas will continue through Saturday night. High pressure will build into the southeastern states in the wake of the front on Saturday and will weaken as it moves directly over our waters on Sunday evening, allowing seas to subside below caution levels. Weak low pressure will then move eastward across the southeastern gulf of mexico on Sunday night and Monday, which may spread a few light showers over our waters. A weak pressure pattern will then prevail locally early next week, with northerly winds prevailing through midweek.
Gulf stream.. The approximate location of the west wall of the gulf stream as of jan 23, 2020 at 1200 utc... 63 nautical miles east of flagler beach. 73 nautical miles east of saint augustine beach. 81 nautical miles east northeast of jacksonville beach. 80 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 242327 AFDJAX

Area Forecast Discussion National Weather Service Jacksonville FL 627 PM EST Fri Jan 24 2020

AVIATION. [Through 00Z Sunday]

A cold front was moving through the area this evening. A few showers are possible through 03Z before the front moves through. MVFR cigs and possibly IFR cigs towards KGNV and KSGJ are forecast to trail behind the front, moving across the TAF sites around midnight and ending before daybreak on Saturday. Mainly clear skies are expected on Saturday. Light southwest winds will become westerly behind the front and west to west northwest on Saturday 5-10 knots.

PREV DISCUSSION [454 PM EST].

NEAR TERM [Through Saturday].

The closed deep-layered trough will continue to progress slowly northeastward towards the eastern Great Lakes region by Saturday evening. The cold front associated with this trough will sweep eastward through our region this evening, entering the Atlantic waters towards midnight. Scattered showers a few thunderstorms will be possible this evening ahead of the front. Skies will quickly clear out from west to east overnight through the predawn hours, with a west-northwest breeze of 5-10 mph helping to usher a cooler and drier air mass into our region. Lows tonight will range from around 40 in the western Suwannee Valley to near 50 at the northeast Florida beaches. Zonal flow aloft and weak cold air advection will result in highs near late January climatology on Saturday, with lower 60s expected for most of southeast Georgia, the mid 60s in northeast Florida and the upper 60s in north central Florida.

SHORT TERM [Saturday Night Through Monday Night].

Surface ridging centered over the lower Mississippi Valley on Saturday will weaken as it progresses eastward on Saturday night. Clear skies and decoupling winds on Saturday evening will result in a seasonably cold night across our region, with lows falling to the mid and upper 30s at most inland locations, ranging to around 40 at the coast. Patchy to possibly areas of frost formation are expected during the predawn and early morning hours on Sunday for locations west of the I-95 corridor.

Meanwhile, closed upper troughing will pivot east-northeastward across New England on Sunday, reaching the Canadian Maritime Region by Monday evening. Deep westerly flow aloft on Saturday night will shift to northwesterly on Sunday. A shortwave trough diving southeastward from the Canadian Prairies through the Dakotas on Saturday night and through the Upper Midwest on Sunday will develop a powerful 160 knot jet streak at 250 millibars (34,000 feet) over the southeastern states by Sunday evening, which should induce weak cyclogenesis over the central Gulf of Mexico. Mid and high altitude cloud cover will increase from west to east on Sunday afternoon. Otherwise, a loosening pressure gradient will allow for a weak sea breeze to develop at coastal locations, which will keep afternoon highs in the upper 50s to lower 60s, with highs in the 60-65 degree range elsewhere.

Shortwave troughing will sharpen on Sunday night and Monday as it dives southeastward through the Ohio Valley and across the Appalachians. This weather pattern will push the weak surface low pressure center eastward across the Gulf of Mexico, reaching central or southwest Florida by Monday afternoon and then exiting into the Atlantic waters near the northern Bahamas on Monday evening. Isentropic lift will strengthen in advance of this weak storm system on Sunday evening, with stratus clouds thickening and producing isolated to widely scattered light showers, sprinkles and drizzle over our area towards sunrise on Monday. Lows Sunday may occur around midnight before lower cloud cover arrives from the west, with readings generally in the 40s and temperatures slowly rising towards sunrise. Light showers should exit our region by Monday afternoon, with cloud cover decreasing in coverage from west to east during the late afternoon and early evening hours. Highs on Monday will remain near climo, or generally in the 60-65 degree range. Cold air advection on Monday night will drop lows back into the upper 30s for inland southeast Georgia and 40-45 for northeast and north central Florida, with a light north-northwesterly breeze dropping wind chills to near freezing for inland southeast Georgia.

LONG TERM [Tuesday Through Friday].

Fast zonal flow aloft locally will make for a low confidence forecast for the remainder of next week, as the latest 12Z operational GFS brings the next shortwave trough into our region by midweek, while the 12Z operational ECMWF indicates a weaker trough progressing through the southeastern states around midweek. Long-range guidance is in slightly better agreement on a potentially more significant storm system taking shape over the Gulf of Mexico late in the week as a potent shortwave trough that crashes into the Pacific Northwest on Tuesday dives quickly southeastward through the Desert Southwest by late Wednesday and Thursday. Temperatures should continue to run near late January climatology, but we did adjust shower chances upward from what the model blends provided for midweek in the event that the GFS solution of a more potent shortwave trough verifies. We added isolated thunderstorms to the forecast grids for Friday as low pressure takes shape over the Gulf of Mexico and potentially moves directly over our region by early next weekend.

MARINE.

A cold front will move through our area early this evening, resulting in winds shifting from southwesterly to westerly overnight. Speeds will remain at Caution levels of 15-20 knots over the offshore waters tonight and Saturday. Elevated seas will continue through Saturday night, with Small Craft Advisory conditions continuing through Saturday night offshore, with Caution level seas persisting near shore through Saturday afternoon. High pressure will build into the southeastern states in the wake of the front on Saturday and will weaken as it moves directly over our waters on Sunday evening, allowing seas to subside below Caution levels. Weak low pressure will then move eastward across the southeastern Gulf of Mexico on Sunday night and Monday, which may spread a few light showers over our waters. A weak pressure pattern will then prevail locally early next week, with northerly winds prevailing through midweek.

FIRE WEATHER.

A cooler and much drier air mass will filter over our region this weekend, with minimum relative humidity values falling to the 30-35 percent range at most inland locations during the afternoon hours. Breezy west-northwesterly surface and transport winds on Saturday will subside slightly by Sunday afternoon, allowing for a weak sea breeze to develop along the northeast Florida coast.

HYDROLOGY.

Minor flooding continues along most of the upper portions of the Altamaha River, with the flood wave reaching the Baxley gauge this weekend and then possibly bringing gauges up towards minor flood levels downstream next week.

PRELIMINARY POINT TEMPS/POPS.

AMG 44 61 36 60 42 / 30 0 0 10 40 SSI 49 62 42 59 47 / 30 0 0 10 30 JAX 48 66 38 63 43 / 30 0 0 0 20 SGJ 50 66 42 61 48 / 20 0 0 0 20 GNV 46 67 38 64 43 / 20 0 0 10 20 OCF 47 69 39 65 44 / 10 0 0 10 20

JAX WATCHES/WARNINGS/ADVISORIES. FL . High Rip Current Risk until 3 AM EST Saturday for Coastal Duval- Coastal Flagler-Coastal Nassau-Coastal St. Johns.

GA . None. AM . Small Craft Advisory until 5 AM 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.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SAUF1 - St. Augustine, FL 1 mi19 min S 6 G 7 61°F 58°F1016 hPa (+0.7)
41117 13 mi19 min 60°F5 ft
GTXF1 - Guana Tolomato Matanzas Reserve, FL 15 mi94 min Calm 65°F 1017 hPa61°F
LTJF1 37 mi55 min 64°F 62°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 38 mi49 min S 1.9 G 1.9 64°F 57°F1015.4 hPa
BLIF1 39 mi55 min S 2.9 G 2.9 64°F 1015.8 hPa64°F
DMSF1 39 mi49 min 58°F
NFDF1 41 mi49 min SW 2.9 G 5.1 61°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 mi23 minSSW 610.00 miFair66°F61°F84%1016.1 hPa

Link to 5 minute data for KSGJ

Wind History from SGJ (wind in knots)
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Last 24hrN4NW3NW4CalmCalmCalmCalmCalmCalmNE3CalmCalmSE7S7S10SE10SE8SE8SE9SE7SW6CalmS6S6
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Tide / Current Tables for St. Augustine Beach, Florida (2)
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St. Augustine Beach
Click for Map
Fri -- 01:19 AM EST     -0.03 feet Low Tide
Fri -- 07:14 AM EST     Moonrise
Fri -- 07:18 AM EST     Sunrise
Fri -- 07:50 AM EST     5.36 feet High Tide
Fri -- 02:04 PM EST     0.15 feet Low Tide
Fri -- 04:44 PM EST     New Moon
Fri -- 05:49 PM EST     Moonset
Fri -- 05:55 PM EST     Sunset
Fri -- 07:55 PM EST     4.58 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.600.10.92.13.34.45.15.354.12.91.60.60.20.51.42.53.64.34.64.33.52.4

Tide / Current Tables for East Tocoi, St. Johns River, Florida (4)
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East Tocoi
Click for Map
Fri -- 02:01 AM EST     0.81 feet High Tide
Fri -- 07:15 AM EST     Moonrise
Fri -- 07:20 AM EST     Sunrise
Fri -- 08:49 AM EST     -0.28 feet Low Tide
Fri -- 02:30 PM EST     1.00 feet High Tide
Fri -- 04:44 PM EST     New Moon
Fri -- 05:50 PM EST     Moonset
Fri -- 05:56 PM EST     Sunset
Fri -- 09:36 PM EST     -0.19 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.70.80.80.60.40.1-0.1-0.2-0.3-0.10.20.50.8110.90.70.40.1-0.1-0.2-0.20

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
Wind Forecast for Jacksonville, FL (20,4,5,8)
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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 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.