Thursday, July29, 2021
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Marine Weather and Tides
St. Augustine Beach, FL

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:41AMSunset 8:20PM Thursday July 29, 2021 3:55 AM EDT (07:55 UTC) Moonrise 11:09PMMoonset 11:04AM Illumination 75% Phase: Waning Gibbous; Moon at 20 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:202107292130;;628037 Fzus52 Kjax 290707 Cwfjax Coastal Waters Forecast For Northeast Florida/southeast Georgia National Weather Service Jacksonville Fl 307 Am Edt Thu Jul 29 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. Amz450-452-454-292130- 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- 307 Am Edt Thu Jul 29 2021
Today..Northwest winds 5 to 10 knots becoming southeast 10 knots late in the afternoon. Seas 2 to 3 feet with a dominant period 8 seconds. A light chop on the intracoastal waters.
Tonight..South winds 10 knots becoming southwest 5 to 10 knots after midnight. Seas 2 to 3 feet with a dominant period 8 seconds. Mostly smooth on the intracoastal waters.
Friday..Southwest winds 5 to 10 knots becoming south 10 to 15 knots in the afternoon. Seas 2 to 3 feet with a dominant period 8 seconds. A moderate chop on the intracoastal waters.
Friday night..Southwest winds 10 to 15 knots. Seas 2 to 3 feet. A light chop on the intracoastal waters.
Saturday..Southwest winds 10 to 15 knots becoming south 5 to 10 knots in the afternoon. Seas 2 to 3 feet. A moderate chop on the intracoastal waters. Slight chance of showers and Thunderstorms in the afternoon.
Saturday night..Southwest winds 10 to 15 knots. Seas 2 to 3 feet.
Sunday..Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Chance of showers and Thunderstorms.
Sunday night..Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Chance of showers and Thunderstorms.
Monday..Southwest winds 10 knots. Seas 2 to 3 feet. Showers and Thunderstorms likely.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 307 Am Edt Thu Jul 29 2021
Synopsis.. High pressure ridge to the south will provide a light southwest flow through the weekend. A cold front will approach the waters from the northwest next week bringing an increase in winds and rain chances.
Gulf stream.. The approximate location of the west wall of the gulf stream as of jul 29, 2021 at 1200 utc... 63 nautical miles east northeast of flagler beach. 67 nautical miles east of saint augustine beach. 70 nautical miles east of jacksonville beach. 76 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 290700 AFDJAX

Area Forecast Discussion National Weather Service Jacksonville FL 300 AM EDT Thu Jul 29 2021

NEAR TERM [Today through Tonight]. Patchy early morning fog is possible over inland se Ga as high cloudiness shifts south and skies clear. A strong ridge aloft centered over the central U.S. will build into the se states today. Dry air aloft and subsidence will spread into south Georgia along the ridge axis which will keep se Ga dry today. A surface trough moving south across ne Fl and seabreezes moving inland will help produce scattered to numerous showers and thunderstorms this afternoon over inland areas of ne Fl. A weak steering flow and PWATs at 2+" will again result in areas of locally heavy rainfall this afternoon mainly south of the I-10 corridor. Hot and humid conditions will continue with heat indices reaching near 105F this afternoon. Convection will die out this evening with humid conditions overnight.

SHORT TERM. /Friday through Sunday/ . Through this period, a subtropical high pressure ridge center remains centered well into the Atlantic with associated ridge axis suppressed across the southern FL peninsula while a frontal zone remains situated northwest of the region. This patten will provide for a southwest flow regime, with the Gulf sea breeze most active as it pushes inland through the day. The east coast sea breeze will struggle to get much past I95 during the afternoons this period due to the southwest flow. With this pattern will focus greatest convective chances inland on the Gulf sea breeze.

On Friday, for this time of year, precipitable water values will be lower than normal due to the northwesterly flow aloft. PWATS Friday will be between 1.45 and 1.55 north of I-10 with best moisture over north central FL with values between 1.55 and 1.75 inches. This is where isolated to scattered storms will occur along the west coast sea breeze.

On Saturday, a predominant westerly wind will persist through the profile with pwat values increasing between 1.75 and 1.95 inches, which will equate to widely scattered to scattered showers across the region.

On Sunday, moisture levels slightly with PWATs increasing to above 2 inches as a stronger frontal boundary moves into northern Georgia. This will allow an open stream of Gulf moisture to stream into the region with scattered showers and thunderstorms with coverage more numerous over interior southeast Georgia and Suwannee Valley.

Friday into this weekend we look to have hot and muggy days with heat indices peaking out between 107 and 112 each afternoon (advisory range) with highs in the mid to upper 90s as dewpoints remain in the muggy mid to upper 70s without much mixing out of moisture in the afternoon. Drink plenty of water, wear loose fitting clothing, check on pets and the elderly and those without air conditioning. Be mindful of work/rest cycles as well and spend time in shade or air conditioning and seek medical help if experiencing symptoms of heat stress/exhaustion.

LONG TERM. /Sunday night through Wednesday/ . Another upper trough and weak frontal boundary moves into the southeast U.S. for the first part of next week. This will push the ridge over southern Florida once again and also bring increasing moisture to the region. The Gulf sea breeze being most active, as east coast sea breeze largely remains pinned near the coast due to southwest flow. Above normal chances (likely to categorical) for convection this period, mainly in the afternoon and evening hours. Toward midweek, there is increased shear across the region, particularly across SE GA with some stronger to marginally severe weather possible. Temperatures will trend near normal at night. Highs will trend from near normal Monday to a little below normal Tuesday and Wednesday.

AVIATION. [Through 06Z Friday] VFR conditions will prevail this morning with light winds. Scattered to numerous storms expected to develop over ne Fl after 17z this afternoon most likely near GNV and VQQ . ending by 00Z this evening.

MARINE. A light southwest flow with gentle seas will prevail through the weekend with a decrease in shower and thunderstorm activity. Next week the southwest flow will increase along with an increase in showers and thunderstorms over the waters as a cold front approaches the area from the northwest.

Rip Currents: Low risk today and Friday with light offshore winds.

PRELIMINARY POINT TEMPS/POPS.

AMG 94 73 98 77 96 / 0 0 10 0 40 SSI 91 77 95 80 96 / 0 0 0 0 20 JAX 92 74 96 77 97 / 30 0 10 0 30 SGJ 89 74 94 77 95 / 30 10 10 0 30 GNV 89 73 93 76 94 / 50 10 20 0 30 OCF 90 73 93 76 94 / 60 10 30 0 30

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 mi56 min W 4.1 G 5.1 75°F 83°F1015.7 hPa (-0.5)75°F
41117 13 mi56 min 80°F 83°F2 ft
GTXF1 - Guana Tolomato Matanzas Reserve, FL 15 mi71 min WSW 1.9 74°F 1016 hPa74°F
BKBF1 32 mi56 min 77°F 1015.4 hPa (-0.8)
LTJF1 37 mi56 min 77°F 74°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 38 mi56 min S 1.9 G 4.1 77°F 83°F1016 hPa (-0.3)
BLIF1 39 mi56 min S 2.9 G 4.1 78°F 1015.5 hPa (-0.4)78°F
DMSF1 39 mi56 min 85°F
NFDF1 41 mi56 min W 1.9 G 4.1 77°F 1015.3 hPa (-0.5)77°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 mi60 minN 010.00 miA Few Clouds75°F74°F96%1015.9 hPa

Link to 5 minute data for KSGJ

Wind History from SGJ (wind in knots)
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Last 24hrSW4SW5W6SW5SW6SW7W7W8NW6NE9NE8E10SW11SW7W6W4CalmSW4W5CalmCalmCalmSW3Calm
1 day agoSW4S5SW5SW5W5W5SW5W8NW7SE9SE11N9
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2 days agoNW6NW7W6W6SW4W4W9W4SW4SW6W7W6SW6SW4SW4S6S6CalmCalmCalm--S4S6S3

Tide / Current Tables for St. Augustine Beach, Florida (2)
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St. Augustine Beach
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Thu -- 12:36 AM EDT     4.92 feet High Tide
Thu -- 06:42 AM EDT     Sunrise
Thu -- 06:54 AM EDT     0.44 feet Low Tide
Thu -- 12:04 PM EDT     Moonset
Thu -- 01:01 PM EDT     4.75 feet High Tide
Thu -- 07:17 PM EDT     0.93 feet Low Tide
Thu -- 08:19 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.84.94.43.52.41.40.70.40.81.62.63.74.54.84.53.82.921.30.91.11.62.53.4

Tide / Current Tables for East Tocoi, St. Johns River, Florida (4)
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East Tocoi
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Thu -- 02:00 AM EDT     0.16 feet Low Tide
Thu -- 06:43 AM EDT     Sunrise
Thu -- 07:19 AM EDT     0.96 feet High Tide
Thu -- 12:05 PM EDT     Moonset
Thu -- 02:28 PM EDT     0.07 feet Low Tide
Thu -- 07:47 PM EDT     0.93 feet High Tide
Thu -- 08:21 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.20.20.20.40.70.810.90.80.70.50.30.20.10.10.30.50.70.90.90.90.80.6

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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