St. Augustine, FL Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for St. Augustine, FL

February 20, 2024 5:48 PM EST (22:48 UTC) Change Location
Sunrise 6:59 AM   Sunset 6:18 PM
Moonrise 2:51 PM   Moonset 4:46 AM 
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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.

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Marine Forecasts
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AMZ454 Expires:202402210730;;646619 Fzus52 Kjax 201901 Cwfjax
coastal waters forecast for northeast florida/southeast georgia national weather service jacksonville fl 201 pm est Tue feb 20 2024
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.
amz450-452-454-210730- 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- 201 pm est Tue feb 20 2024

Rest of today - North winds around 15 knots. Seas around 4 feet with a dominant period 9 seconds. Intracoastal waters a moderate chop.

Tonight - Northeast winds around 15 knots. Seas 3 to 5 feet with a dominant period 8 seconds. Intracoastal waters a moderate chop.

Wednesday - North winds 15 to 20 knots. Seas 3 to 5 feet with a dominant period 8 seconds. Intracoastal waters choppy.

Wednesday night - Northeast winds 10 to 15 knots, becoming north 5 to 10 knots after midnight. Seas 3 to 5 feet with a dominant period 8 seconds. Intracoastal waters a moderate chop.

Thursday - Northeast winds around 5 knots, becoming south 10 to 15 knots in the afternoon. Seas 3 to 5 feet with a dominant period 10 seconds. Intracoastal waters a moderate chop.

Thursday night - Southwest winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 4 to 6 feet with a dominant period 12 seconds. Intracoastal waters choppy.

Friday - Southwest winds 15 to 20 knots. Seas 4 to 6 feet. Scattered showers in the morning, then numerous showers with isolated Thunderstorms in the afternoon.

Friday night - Northwest winds around 15 knots. Seas 3 to 5 feet.

Saturday - Northwest winds 10 to 15 knots. Seas 2 to 4 feet.

Saturday night - Northwest winds 10 to 15 knots. Seas 2 to 3 feet.
winds and waves higher in and near Thunderstorms.

AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 201 Pm Est Tue Feb 20 2024

Synopsis -
winds and seas will remain slightly elevated through Wednesday with seas supporting small craft advisory for part of the offshore northeast florida marine zone Wednesday into Thursday morning. High pressure over the local area on Thursday will move east ahead of an approaching cold front, which will cross our local waters on Friday afternoon and evening, accompanied by showers and possibly a few Thunderstorms. A northeast ocean swell will result in building seas on Thursday night and Friday, and strengthening southwesterly winds will combine to produce small craft advisory conditions over the offshore waters later this week. Northwest winds will surge in the wake of the cold frontal passage on Friday night and Saturday.

Gulf stream -
the approximate location of the west wall of the gulf stream as of feb 17, 2024 at 1200 utc - .
57 nautical miles east of flagler beach. 59 nautical miles east of saint augustine beach. 75 nautical miles east southeast of jacksonville beach. 90 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, FL
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Area Discussion for - Jacksonville, FL
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FXUS62 KJAX 201919 AFDJAX

Area Forecast Discussion National Weather Service Jacksonville FL 219 PM EST Tue Feb 20 2024

New NEAR TERM, SHORT TERM, LONG TERM, MARINE, FIRE WEATHER

NEAR TERM
Issued at 219 PM EST Tue Feb 20 2024

For the latest NE FL and SE GA Daily Key Messages please visit: https:// www.weather.gov/media/jax/briefings/nws-jax-briefing.pdf

Weak sfc high pressure is over the area with the notable mid level trough moving through GA at this time. A weak trough is noted in the guidance across inland southeast GA but just a weak wind shift there. There will be some mid layer clouds skirting across the northern zones rest of today into the evening hours but the rest of the area will be pretty much cloud-free. Temps are in the 60s and dewpoints have really crashed given the very dry airmass.
Models have struggled as usual trying to forecast dewpoints this low (20s) and so RH values are from the upper teens to the lower to mid 20s.

Tonight, another chilly night and going a bit below some of the guidance so we have mid 30s and patchy to areas of frost inland areas. Winds will be light to calm with good radiational cooling.

SHORT TERM
(Wednesday through Thursday night)
Issued at 219 PM EST Tue Feb 20 2024

A region of surface high pressure dominates from AL to the Carolinas Wednesday producing northeasterly winds for most of the day slowly shifting to easterly winds into the evening. Ridging aloft ensures predominantly clear skies with temperatures in the 60s during the day with radiational cooling allowing temperatures to reach the upper 30s to lower 40s inland with temperatures in the upper 40s along the coast for Thursday morning. A surface high pressure system will be over the area Thursday morning and shifts south throughout the day causing winds to be from the south to southwest. The surface high will produce mostly clear skies to allow for daytime heating for highs in the upper 60s along the coast and lower 70s inland. Overnight a cold front will begin to push in from the northwest bringing cloud cover and scattered showers for Friday morning.

LONG TERM
(Friday through next Tuesday)
Issued at 219 PM EST Tue Feb 20 2024

A cold front coming in from the northwest and will push southeast into our area allowing for showers to begin in the morning for inland southeast GA. There will be enough instability at the surface creating a narrow ribbon of deeper moisture with a 40-knot low level west-southwesterly jet at 850 millibars (around 5,000 feet), allowing for isolated thunderstorm potential in the afternoon mainly north of I-10. At this time conditions are not favorable for a severe weather threat. Rain will progressively move eastward throughout the day and move offshore around sunset.
Highs will climb into the 70s on Friday area-wide, after the cold front passes Friday night temperatures will drop back to near normal.

After the front passes, Saturday will have breezy northwesterly winds and mostly clear skies with highs in the upper 60s. A surface high pressure system will make its way into the area Saturday evening and into Sunday morning, Sunday will have slightly warmer temperatures and clear skies.

AVIATION
(18Z TAFS)
Issued at 1245 PM EST Tue Feb 20 2024

VFR conditions will dominate through Wednesday. Sfc winds will be northeasterly at most of the TAFs this afternoon, and then become mostly light and variable by about 00z tonight. Winds will be north- northeast to northeast near 10 kt, a bit higher for SGJ and SSI, on Wednesday after 14z.

MARINE
Issued at 219 PM EST Tue Feb 20 2024

Northeasterly winds near 10-15 kt or 15 kt and seas upwards of 3-6 ft over the area waters at this time with dominant wave periods close to 9 seconds. Winds will increase slightly going into Wednesday and Wednesday night, which will push seas a bit higher so have small craft advisory for the outer northeast FL marine zone AMZ474. Timing of the hazard for now has been advertised from Wednesday morning through Thursday morning. High pressure over the local area on Thursday will then move east ahead of an approaching cold front, which will cross our local waters on Friday afternoon and evening, accompanied by showers and possibly a few thunderstorms. A northeast ocean swell will result in building seas on Thursday night and Friday, and strengthening southwesterly winds will combine to produce Small Craft Advisory conditions over the offshore waters later this week. Northwest winds will surge in the wake of the cold frontal passage on Friday night and Saturday.

Rip Currents: Moderate rip current risk for NE FL and SE GA beaches through Wednesday.

FIRE WEATHER
Issued at 219 PM EST Tue Feb 20 2024

MinRH values will barely improve on Wednesday, values will drop into the upper 20% to lower 30% range for inland southeast Georgia and northeast Florida. Moisture will return to the area on Friday as a cold front approaches from the northwest. Numerous showers are forecast throughout the day Friday, with embedded isolated thunderstorm potential mainly north of I-10 Friday afternoon.
Dispersion values will be good on Wednesday and Thursday as northeasterly winds pick up on Wednesday, and shift to southerly on Thursday ahead of the frontal passage. It will be breezy on Friday and winds will shift to northwesterly after the front moves through Friday evening.

PRELIMINARY POINT TEMPS/POPS
AMG 35 65 39 72 / 0 0 0 0 SSI 42 60 45 66 / 0 0 0 0 JAX 39 63 40 72 / 0 0 0 0 SGJ 44 62 45 69 / 0 0 0 0 GNV 37 67 40 73 / 0 0 0 0 OCF 38 67 39 73 / 0 0 0 0

JAX WATCHES/WARNINGS/ADVISORIES
FL...None.
GA...None.
AM...Small Craft Advisory from 7 AM Wednesday to 4 AM EST Thursday for AMZ474.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesinHgDewPt
SAUF1 - St. Augustine, FL 3 mi49 min NNE 13G15 57°F 59°F30.2351°F
41117 15 mi49 min 61°F4 ft
GTXF1 - Guana Tolomato Matanzas Reserve, FL 16 mi64 min NNE 8.9 58°F 30.2745°F
BKBF1 30 mi49 min NE 12G13 60°F 30.21
LTJF1 35 mi49 min 56°F 40°F
JXUF1 36 mi49 min 62°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 36 mi49 min NE 11G13 56°F 59°F30.25
BLIF1 37 mi49 min NE 8.9G12 58°F 30.2638°F
DMSF1 37 mi49 min 61°F
NFDF1 40 mi49 min ENE 11G14 58°F 30.2338°F
41069 49 mi101 min N 12G18 59°F 62°F30.2051°F
41070 49 mi109 min 62°F4 ft


Wind History for I-295 Bridge, St Johns River, FL
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KSGJ NORTHEAST FLORIDA RGNL,FL 6 sm52 minvar 06G1410 smClear57°F39°F51%30.25
Link to 5 minute data for KSGJ


Wind History from SGJ
(wind in knots)
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Tide / Current for St. Augustine, city dock, Florida
   
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St. Augustine
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Tue -- 04:46 AM EST     Moonset
Tue -- 05:32 AM EST     4.35 feet High Tide
Tue -- 07:00 AM EST     Sunrise
Tue -- 12:03 PM EST     0.37 feet Low Tide
Tue -- 02:50 PM EST     Moonrise
Tue -- 05:56 PM EST     3.47 feet High Tide
Tue -- 06:17 PM EST     Sunset
Tue -- 11:55 PM EST     0.05 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

St. Augustine, city dock, Florida, Tide feet
12
am
0.4
1
am
1
2
am
1.9
3
am
2.9
4
am
3.8
5
am
4.3
6
am
4.3
7
am
3.9
8
am
3.1
9
am
2.2
10
am
1.3
11
am
0.6
12
pm
0.4
1
pm
0.6
2
pm
1.1
3
pm
1.9
4
pm
2.7
5
pm
3.3
6
pm
3.5
7
pm
3.2
8
pm
2.6
9
pm
1.8
10
pm
0.9
11
pm
0.3



Tide / Current for East Tocoi, St. Johns River, Florida
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East Tocoi
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Tue -- 04:47 AM EST     Moonset
Tue -- 05:12 AM EST     4.96 feet Low Tide
Tue -- 07:01 AM EST     Sunrise
Tue -- 11:17 AM EST     5.87 feet High Tide
Tue -- 02:52 PM EST     Moonrise
Tue -- 05:52 PM EST     5.10 feet Low Tide
Tue -- 06:18 PM EST     Sunset
Tue -- 11:23 PM EST     5.74 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

East Tocoi, St. Johns River, Florida, Tide feet
12
am
5.6
1
am
5.4
2
am
5.3
3
am
5.2
4
am
5
5
am
5
6
am
5
7
am
5.2
8
am
5.4
9
am
5.6
10
am
5.8
11
am
5.9
12
pm
5.8
1
pm
5.7
2
pm
5.6
3
pm
5.4
4
pm
5.3
5
pm
5.2
6
pm
5.1
7
pm
5.2
8
pm
5.4
9
pm
5.5
10
pm
5.6
11
pm
5.7




Weather Map
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GEOS Local Image of southeast   
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Jacksonville, FL,



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