St. Marys, GA Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for St. Marys, GA

June 19, 2024 2:04 PM EDT (18:04 UTC) Change Location
Sunrise 6:22 AM   Sunset 8:33 PM
Moonrise 5:37 PM   Moonset 3:06 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.

Marine Forecasts
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AMZ450 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- 939 Am Edt Wed Jun 19 2024

.small craft advisory in effect through late Thursday night - .

Rest of today - East winds around 20 knots. Seas 6 to 8 feet, occasionally to 10 feet. Wave detail: east 7 feet at 8 seconds. Intracoastal waters choppy. A slight chance of showers this morning, then a chance of showers with a slight chance of Thunderstorms this afternoon.

Tonight - East winds around 20 knots. Seas 6 to 7 feet, occasionally to 9 feet. Wave detail: east 7 feet at 8 seconds. Intracoastal waters choppy. A slight chance of Thunderstorms. Showers likely, mainly in the evening.

Thursday - Northeast winds 15 to 20 knots. Seas 5 to 7 feet, occasionally to 9 feet. Wave detail: east 7 feet at 8 seconds. Intracoastal waters choppy. A slight chance of Thunderstorms. A chance of showers in the morning, then showers in the afternoon.

Thursday night - Northeast winds 15 to 20 knots, diminishing to 10 to 15 knots after midnight. Seas 5 to 7 feet, occasionally to 9 feet. Wave detail: east 7 feet at 9 seconds. Intracoastal waters choppy. Showers likely with a slight chance of Thunderstorms.

Friday - East winds 10 to 15 knots. Seas 4 to 6 feet, occasionally to 8 feet. Wave detail: east 6 feet at 9 seconds. Intracoastal waters a moderate chop. A slight chance of Thunderstorms. Showers.

Friday night - Southeast winds 10 to 15 knots, diminishing to 5 to 10 knots after midnight. Seas 3 to 5 feet, occasionally to 6 feet. Wave detail: east 5 feet at 9 seconds. Intracoastal waters a moderate chop. A slight chance of Thunderstorms. A chance of showers, mainly in the evening.

Saturday through Sunday - Southwest winds 10 to 15 knots. Seas 2 to 4 feet, occasionally to 5 feet. Intracoastal waters a moderate chop. Showers likely with a slight chance of Thunderstorms.
winds and waves higher in and near Thunderstorms.

AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 939 Am Edt Wed Jun 19 2024

Synopsis -
strong high pressure will remain anchored off coastal new england through Thursday maintaining small craft advisory conditions across the coastal waters. Meanwhile, a trough situated to the northeast of the bahamas will be steered westward towards the southeastern seaboard late this week, with weak low pressure possibly developing as this system traverses the gulf stream waters. Showers and Thunderstorms are expected to increase in coverage late this week and through the upcoming weekend across our local waters. High pressure will weaken late this week as it sinks slowly southward towards bermuda, with the axis of this surface ridge extending across our area during the upcoming weekend.

Gulf stream -
the approximate location of the west wall of the gulf stream as of jun 18, 2024 at 1200 utc - .
57 nautical miles east of flagler beach. 66 nautical miles east of saint augustine beach. 75 nautical miles east of jacksonville beach. 88 nautical miles east of st simons island.
this data courtesy of the naval oceanographic office.


7 Day Forecast for Marine Location Near St. Marys, GA
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Area Discussion for - Jacksonville, FL
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FXUS62 KJAX 191803 AFDJAX

Area Forecast Discussion National Weather Service Jacksonville FL 203 PM EDT Wed Jun 19 2024

New AVIATION

UPDATE
Issued at 1020 AM EDT Wed Jun 19 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

Very deep easterly flow is noted in the cross section in model guidance and JAX sounding, but more northeast aloft at 300 mb and above. Best moisture is in the lowest levels below about 8000 ft per the observed sounding. Essentially did not make much change to the forecast today, with slight lowering of POPs by about 10 percent, showing low chances near the 20-40 percent range due to weak to moderate low level convergence and daytime heating. Skies mainly mostly sunny to partly cloudy skies. However, showed more cloudiness today across the southern zones based on visible imagery and short range guidance. Also, did some adjustments to the rainfall amounts through Thursday based on latest guidance.
Forecast max and min temps today and tonight are on track.

Easterly winds up to 15-25 mph and gusts to around 35 mph, so still looks like under criteria for wind advisory. A few higher gusts possible (about 40 mph) in a stronger shower or a very isolated thunderstorm.

For the marine update, just slight changes for the winds and seas based on the observations. Latest buoys show seas of 6-7 ft, so slightly lower than last night. Marine forecast has about 6-9 ft with occasional 10-11 ft today and tonight. Small craft advisory is on track as is the high surf advisory and rip current statement in effect.

NEAR TERM
(Today and Tonight)
Issued at 121 AM EDT Wed Jun 19 2024

Strong onshore/Easterly flow will continue through tonight with mainly scattered light to moderate showers moving onshore at times, although occasional slugs of deeper moisture will bring brief periods of heavy rainfall and possibly an isolated thunderstorm, but overall storm chances remain low through tonight over inland areas and will likely mainly be seen tonight over the Atlantic Coastal waters and possibly coming onshore at times.
Sustained Easterly winds will remain in the 15-25mph with gusts into the 30-40 mph range along the Atlantic Coast, just below Wind Advisory headlines, and will push inland at these levels during the daytime hours and mix down with any shower activity that develops. Max temps will remain at or slightly below normal with highs in the middle 80s at the Atlantic beaches, upper 80s along the I-95 corridor and around 90F over far inland areas. Winds diminish over inland areas tonight with the Easterly flow will remain breezy along the Atlantic Coast with continued scattered showers pushing onshore into the Atlantic Coastal areas at least as far inland to the US 17 corridor and the St. Johns River Basin through the night. Lows temps will fall into the lower 70s across inland areas, with the onshore flow keeping the Atlantic Coastal areas warm and muggy in the middle to upper 70s, otherwise low temps in the next 24 hours may actually occur during rain cooled shower activity for most location along the Atlantic Coast.

SHORT TERM
(Thursday through Friday night)
Issued at 121 AM EDT Wed Jun 19 2024

High pressure will be centered to the northeast through this period, continuing the prolonged period of onshore flow. Waves of low pressure will move through this flow, producing enhanced chances for precipitation. The strongest of these waves will move across the area Thursday afternoon through Thursday night.

During the day times on Thursday and Friday, there will be a chance for a few storms with diurnal heating. During the nights, convective potential will be minimal.

Highs will be below normal due to the onshore flow, while this same flow will keep readings above normal at night.

LONG TERM
(Saturday through Tuesday)
Issued at 121 AM EDT Wed Jun 19 2024

The high will build more toward the east northeast Saturday into Saturday night. This will result in a more southeast to south flow. This change in flow will result in warmer temperatures, and greater convective chances, especially Saturday afternoon and evening. The high will move more to the east on Sunday, yielding a mostly southerly flow. This will help produce an even warmer day on Sunday, with above normal convective chances occurring.

A weak frontal boundary will move south southeast across the area Monday into Tuesday. The resultant flow will be from the southwest. This will keep temperatures above normal, with these warmer readings pushing all the way to the coast. Convective chances will continue to run above normal.

AVIATION
(18Z TAFS)
Issued at 155 PM EDT Wed Jun 19 2024

Primarily VFR scattered to broken clouds around at 3500-6000 ft with isolated to scattered shower activity. Most of the showers in the next 1-3 hours will be located near around JAX metro areas and into near SSI, with TEMPO group in for a couple of the metro TAFs.
A better chance of showers expected tonight, and included TEMPO group for SGJ. Additional chances for showers on Thursday but rain chances fairly limited near 30 percent so VCSH will suffice for now. Sfc winds will be easterly to about 15-20G25-30kt and will generally weaken tonight.

MARINE
Issued at 121 AM EDT Wed Jun 19 2024

Small Craft Advisories will continue through Thursday with East winds in the 20-25 knot range with frequent gusts to 30 knots at times. Models still on track with inverted surface trough under area of low pressure aloft pushing into the FL East Coast Atlantic waters Thursday Night and/or Early Friday which will likely continue strong onshore flow at Small Craft Advisory levels with low chances of potential Gale Force winds if an organized low pressure center can develop. Winds will then shift to the Southeast following the wave by this weekend with a decrease in wind speeds to 10-15 knots and slowly subsiding seas below headline levels.

Rip Currents: The strong onshore flow will continue a high risk of rip currents this week with surf/breakers of 4-6 ft Today and Thursday, but will need to keep an eye on local surf/beach reports today for potential high surf advisory for surf/breakers of 7 ft or higher. With the approach of the full moon later this week, water levels will start to run above normal but coastal flooding is not expected at this time in the onshore flow.

PRELIMINARY POINT TEMPS/POPS
AMG 69 90 69 91 / 20 20 20 50 SSI 75 87 77 87 / 40 50 60 70 JAX 74 87 73 89 / 40 70 50 70 SGJ 76 86 76 89 / 60 70 60 70 GNV 72 89 71 92 / 30 60 30 70 OCF 73 91 73 94 / 30 60 30 80

JAX WATCHES/WARNINGS/ADVISORIES
FL...High Rip Current Risk through late Thursday night for FLZ124-125- 133-138.

High Surf Advisory until 5 AM EDT Friday for FLZ124-125-133-138.

GA...High Rip Current Risk through late Thursday night for GAZ154-166.

AM...Small Craft Advisory until 5 AM EDT Friday for AMZ450-452-454- 470-472-474.




Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
FRDF1 - 8720030 - Fernandina Beach, FL 5 mi47 minENE 8G19 87°F 83°F30.17
KBMG1 5 mi47 min 82°F 30.18
41112 - Offshore Fernandina Beach, FL (132) 14 mi65 min 81°F 83°F6 ft
NFDF1 22 mi47 minENE 17G21 82°F 30.1678°F
BLIF1 23 mi47 minENE 13G21 83°F 30.1972°F
DMSF1 23 mi47 min 85°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 23 mi47 minENE 18G21 80°F 83°F30.20
LTJF1 24 mi47 min 81°F 74°F
JXUF1 26 mi47 min 85°F
BKBF1 37 mi47 minESE 9.9G17 80°F 30.14


Wind History for Fernandina Beach, FL
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KFHB FERNANDINA BEACH MUNI,FL 9 sm29 minE 19G2310 smMostly Cloudy84°F70°F62%30.18
KJAX JACKSONVILLE INTL,FL 18 sm68 minENE 17G2610 smMostly Cloudy86°F70°F59%30.16
KNRB MAYPORT NS (ADM DAVID L MCDONALD FIELD),FL 24 sm32 minENE 073/4 smOvercast Hvy Rain 79°F72°F79%30.17
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Wind History graph: FHB
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Tide / Current for St. Marys, St. Marys River, Florida
   
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St. Marys
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Wed -- 02:09 AM EDT     1.41 feet Low Tide
Wed -- 04:05 AM EDT     Moonset
Wed -- 06:23 AM EDT     Sunrise
Wed -- 08:00 AM EDT     5.75 feet High Tide
Wed -- 01:57 PM EDT     0.99 feet Low Tide
Wed -- 06:36 PM EDT     Moonrise
Wed -- 08:31 PM EDT     Sunset
Wed -- 08:40 PM EDT     7.00 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

St. Marys, St. Marys River, Florida, Tide feet
12
am
2.9
1
am
1.9
2
am
1.4
3
am
1.7
4
am
2.5
5
am
3.6
6
am
4.6
7
am
5.5
8
am
5.8
9
am
5.5
10
am
4.6
11
am
3.4
12
pm
2.2
1
pm
1.3
2
pm
1
3
pm
1.4
4
pm
2.5
5
pm
3.8
6
pm
5.1
7
pm
6.2
8
pm
6.9
9
pm
7
10
pm
6.4
11
pm
5.3


Tide / Current for St. Johns River Entrance, Florida Current (3)
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St. Johns River Entrance
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Wed -- 12:03 AM EDT     -1.53 knots Max Ebb
Wed -- 04:05 AM EDT     Moonset
Wed -- 04:24 AM EDT     0.00 knots Slack
Wed -- 06:23 AM EDT     Sunrise
Wed -- 06:36 AM EDT     1.50 knots Max Flood
Wed -- 09:18 AM EDT     -0.00 knots Slack
Wed -- 11:51 AM EDT     -1.69 knots Max Ebb
Wed -- 03:46 PM EDT     0.00 knots Slack
Wed -- 06:36 PM EDT     Moonrise
Wed -- 06:58 PM EDT     2.47 knots Max Flood
Wed -- 08:31 PM EDT     Sunset
Wed -- 10:14 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

St. Johns River Entrance, Florida Current (3), knots
12
am
-1.5
1
am
-1.4
2
am
-1.2
3
am
-0.8
4
am
-0.3
5
am
0.6
6
am
1.4
7
am
1.5
8
am
1
9
am
0.3
10
am
-0.7
11
am
-1.5
12
pm
-1.7
1
pm
-1.4
2
pm
-1
3
pm
-0.4
4
pm
0.1
5
pm
1.1
6
pm
2.1
7
pm
2.5
8
pm
2.1
9
pm
1.4
10
pm
0.3
11
pm
-0.9


Weather Map
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GEOS Local Image of southeast   
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Jacksonville, FL,




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