Marine Weather and Tide Forecast for St. Simons, GA
 | Sunrise 6:20 AM Sunset 8:33 PM Moonrise 11:43 PM Moonset 10:15 AM |
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- 152 Pm Edt Mon Jun 16 2025
Tonight - South winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: southeast 3 feet at 5 seconds. Intracoastal waters a moderate chop. A chance of showers and Thunderstorms this evening.
Tuesday - South winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: southeast 3 feet at 5 seconds and southeast 2 feet at 8 seconds. Intracoastal waters a moderate chop. A slight chance of showers and Thunderstorms in the afternoon.
Tuesday night - South winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: southeast 3 feet at 5 seconds. Intracoastal waters a moderate chop.
Wednesday - South winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: southeast 2 feet at 5 seconds and southeast 2 feet at 8 seconds. Intracoastal waters a moderate chop. A slight chance of showers and Thunderstorms in the afternoon.
Wednesday night - South winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: southeast 3 feet at 4 seconds. Intracoastal waters a moderate chop.
Thursday and Thursday night - Southwest winds 10 to 15 knots. Seas around 2 feet. Wave detail: southeast 2 feet at 5 seconds and southeast 2 feet at 8 seconds. Intracoastal waters a moderate chop. A chance of showers and Thunderstorms.
Friday through Saturday - South winds 5 to 10 knots. Seas around 2 feet. Intracoastal waters light chop. A chance of showers and Thunderstorms.
winds and waves higher in and near Thunderstorms.
winds and waves higher in and near Thunderstorms.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 152 Pm Edt Mon Jun 16 2025
Synopsis -
the atlantic high pressure ridge will continue to extend its axis westward across the florida peninsula this week, keeping a prevailing south to southwest wind flow across our area. Showers and Thunderstorms will impact our local waters during the afternoon and evening hours, with isolated strong storms possible, bringing briefly gusty winds, frequent lightning strikes, and torrential downpours. Rain chances will decrease for the local waters Tuesday through Thursday. A weak front enters the southeast states late this week, resulting in increasing chances for afternoon and evening Thunderstorms by Friday and Saturday.
Gulf stream -
the approximate location of the west wall of the gulf stream as of jun 14, 2025 at 1200 utc - .
64 nautical miles east of flagler beach. 74 nautical miles east of saint augustine beach. 89 nautical miles east of jacksonville beach. 99 nautical miles east of st simons island.
this data courtesy of the naval oceanographic office.
the atlantic high pressure ridge will continue to extend its axis westward across the florida peninsula this week, keeping a prevailing south to southwest wind flow across our area. Showers and Thunderstorms will impact our local waters during the afternoon and evening hours, with isolated strong storms possible, bringing briefly gusty winds, frequent lightning strikes, and torrential downpours. Rain chances will decrease for the local waters Tuesday through Thursday. A weak front enters the southeast states late this week, resulting in increasing chances for afternoon and evening Thunderstorms by Friday and Saturday.
the approximate location of the west wall of the gulf stream as of jun 14, 2025 at 1200 utc - .
64 nautical miles east of flagler beach. 74 nautical miles east of saint augustine beach. 89 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 St. Simons, GA
NEW! Add second zone forecast
| St. Simons Light Click for Map Mon -- 12:10 AM EDT Moonrise Mon -- 12:17 AM EDT 6.96 feet High Tide Mon -- 06:21 AM EDT Sunrise Mon -- 06:56 AM EDT 0.31 feet Low Tide Mon -- 11:14 AM EDT Moonset Mon -- 12:48 PM EDT 6.15 feet High Tide Mon -- 06:59 PM EDT 0.69 feet Low Tide Mon -- 08:31 PM EDT Sunset Tide / Current data from XTide NOT FOR NAVIGATION |
St. Simons Light, Georgia, Tide feet
| 12 am |
| 6.9 |
| 1 am |
| 6.8 |
| 2 am |
| 6.1 |
| 3 am |
| 4.9 |
| 4 am |
| 3.4 |
| 5 am |
| 1.9 |
| 6 am |
| 0.7 |
| 7 am |
| 0.3 |
| 8 am |
| 0.9 |
| 9 am |
| 2.2 |
| 10 am |
| 3.8 |
| 11 am |
| 5.1 |
| 12 pm |
| 5.9 |
| 1 pm |
| 6.1 |
| 2 pm |
| 5.7 |
| 3 pm |
| 4.8 |
| 4 pm |
| 3.5 |
| 5 pm |
| 2.1 |
| 6 pm |
| 1.1 |
| 7 pm |
| 0.7 |
| 8 pm |
| 1.2 |
| 9 pm |
| 2.4 |
| 10 pm |
| 4 |
| 11 pm |
| 5.4 |
| Tide / Current data from XTide NOT FOR NAVIGATION |
Mackay River (Daymark %23239), Georgia, Tide feet
Area Discussion for Jacksonville, FL
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FXUS62 KJAX 161757 AFDJAX
Area Forecast Discussion National Weather Service Jacksonville FL 157 PM EDT Mon Jun 16 2025
New NEAR TERM, SHORT TERM, LONG TERM, MARINE
NEAR TERM
(Tonight and Tuesday)
Issued at 153 PM EDT Mon Jun 16 2025
For the latest NE FL and SE GA Daily Key Messages please visit: https:// www.weather.gov/media/jax/briefings/nws-jax-briefing.pdf
Tonight: Scattered to numerous storm activity should continue to increase in coverage and intensity as it reaches the East Coast sea breeze parked along the I-95 corridor during the late afternoon/early evening hours before shifting offshore after sunset. Still expecting a few strong storms with gusty winds to 50 mph, frequent lightning strikes and heavy rainfall during this merger and an isolated severe storm cannot be ruled out. Fair skies are expected during the overnight hours as low temps fall into the lower/middle 70s inland and upper 70s along the coast.
Some patchy fog is possible just before sunrise over inland areas, but significant dense fog is not expected.
Tuesday...Ridge axis from the Western Atlantic remains in place across the Central FL Peninsula which will continue a similar South to Southwest flow pattern, although a few models do suggest a very slight northward shift in this axis, along with a slightly drier airmass trying to filter northward up the FL Peninsula with this potential shift of the ridge axis. For now still expect at least scattered early afternoon storms will develop over inland areas in the SW flow and drift towards the E-NE and will interact with the East Coast sea breeze that may push a bit further inland to the US 17 Corridor and/or the St. Johns River Basin, which could lead to lesser storm chances for the Atlantic beaches as the S-SW flow pattern may not be strong enough to push them all the way back towards the Atlantic Coast by the late afternoon/evening hours. Otherwise, still expect Max temps into the lower to middle 90s inland and around 90F along the Atlantic Coast, with peak heat indices pushing closer to 105F during the afternoon hours. Temps will generally be on the higher side of guidance on Tuesday if storm coverage ends up lower than expected.
SHORT TERM
(Tuesday night through Thursday)
Issued at 153 PM EDT Mon Jun 16 2025
High pressure ridging extending in from out of the east over the forecast area will act to bring in drier air and more stable conditions over the forecast area into Thursday with the pressure axis gradually drifting northward towards the frontal boundary pressing in from out of the northwest. Initially southerly flow will transition by Thursday with the rising ridge with mainly scattered diurnal showers and thunderstorms expected before the end of the week. High temperatures for the period will consistently rise into the mid 90s for inland areas and in the lower 90s for areas along the coastline. Overnight low temperatures will drop down into the lower to mid 70s.
LONG TERM
(Friday through next Monday)
Issued at 153 PM EDT Mon Jun 16 2025
Troughing ahead of the approaching frontal boundary will move into Georgia by the end of the week and into the weekend, stalling over Georgia as high pressure ridging over the region becomes less organized. Chances for showers and storms are anticipated to be highest on Friday with convection becoming less likely over the course of the weekend as high pressure conditions and drier air builds in over the forecast area. Temperatures through the end of the week and into the weekend will remain consistently above the seasonal average with highs in the 90s and heat index values exceeding 100 degrees.
AVIATION
(18Z TAFS)
Issued at 118 PM EDT Mon Jun 16 2025
Scattered storms slowly developing across inland NE FL and will impact GNV in the 18-21Z time frame before pushing towards the Atlantic Coastal TAF sites and have continued TEMPO groups in the 20-24Z time frame for gusty winds and potential MVFR conds, but timing remains low to moderate at this time. Convection fades after sunset with lingering mid/high clouds, but still expecting mainly VFR conds, except for the usual MVFR fog at VQQ in the 07-11Z time frame. Light Southwest surface winds develop again for Tuesday morning with SCT clouds around 2500 ft by 14-15Z, but not expecting widespread MVFR morning CIGS at this time.
MARINE
Issued at 153 PM EDT Mon Jun 16 2025
Little change expected as the Atlantic high pressure ridge will continue to extend its axis westward across the Florida peninsula this week, keeping a prevailing south to southwest wind flow across our area. Showers and thunderstorms will impact our local waters during the afternoon and evening hours, with isolated strong storms possible, bringing briefly gusty winds, frequent lightning strikes, and torrential downpours. Rain chances will decrease for the local waters Tuesday through Thursday. A weak front enters the southeast states late this week, resulting in increasing chances for afternoon and evening thunderstorms by Friday and Saturday.
Rip Currents: Borderline Moderate Risk of Rips will continue this week with surf/breakers generally in the 1-2 ft range, then briefly up to 2-3 ft during the daily sea breeze development.
PRELIMINARY POINT TEMPS/POPS
AMG 72 94 72 93 / 20 20 10 30 SSI 77 89 76 90 / 20 20 10 20 JAX 74 95 74 94 / 20 40 10 40 SGJ 74 92 75 92 / 20 30 10 30 GNV 72 94 73 96 / 20 50 10 40 OCF 72 95 73 95 / 20 30 10 40
JAX WATCHES/WARNINGS/ADVISORIES
FL...None.
GA...None.
AM...None.
Area Forecast Discussion National Weather Service Jacksonville FL 157 PM EDT Mon Jun 16 2025
New NEAR TERM, SHORT TERM, LONG TERM, MARINE
NEAR TERM
(Tonight and Tuesday)
Issued at 153 PM EDT Mon Jun 16 2025
For the latest NE FL and SE GA Daily Key Messages please visit: https:// www.weather.gov/media/jax/briefings/nws-jax-briefing.pdf
Tonight: Scattered to numerous storm activity should continue to increase in coverage and intensity as it reaches the East Coast sea breeze parked along the I-95 corridor during the late afternoon/early evening hours before shifting offshore after sunset. Still expecting a few strong storms with gusty winds to 50 mph, frequent lightning strikes and heavy rainfall during this merger and an isolated severe storm cannot be ruled out. Fair skies are expected during the overnight hours as low temps fall into the lower/middle 70s inland and upper 70s along the coast.
Some patchy fog is possible just before sunrise over inland areas, but significant dense fog is not expected.
Tuesday...Ridge axis from the Western Atlantic remains in place across the Central FL Peninsula which will continue a similar South to Southwest flow pattern, although a few models do suggest a very slight northward shift in this axis, along with a slightly drier airmass trying to filter northward up the FL Peninsula with this potential shift of the ridge axis. For now still expect at least scattered early afternoon storms will develop over inland areas in the SW flow and drift towards the E-NE and will interact with the East Coast sea breeze that may push a bit further inland to the US 17 Corridor and/or the St. Johns River Basin, which could lead to lesser storm chances for the Atlantic beaches as the S-SW flow pattern may not be strong enough to push them all the way back towards the Atlantic Coast by the late afternoon/evening hours. Otherwise, still expect Max temps into the lower to middle 90s inland and around 90F along the Atlantic Coast, with peak heat indices pushing closer to 105F during the afternoon hours. Temps will generally be on the higher side of guidance on Tuesday if storm coverage ends up lower than expected.
SHORT TERM
(Tuesday night through Thursday)
Issued at 153 PM EDT Mon Jun 16 2025
High pressure ridging extending in from out of the east over the forecast area will act to bring in drier air and more stable conditions over the forecast area into Thursday with the pressure axis gradually drifting northward towards the frontal boundary pressing in from out of the northwest. Initially southerly flow will transition by Thursday with the rising ridge with mainly scattered diurnal showers and thunderstorms expected before the end of the week. High temperatures for the period will consistently rise into the mid 90s for inland areas and in the lower 90s for areas along the coastline. Overnight low temperatures will drop down into the lower to mid 70s.
LONG TERM
(Friday through next Monday)
Issued at 153 PM EDT Mon Jun 16 2025
Troughing ahead of the approaching frontal boundary will move into Georgia by the end of the week and into the weekend, stalling over Georgia as high pressure ridging over the region becomes less organized. Chances for showers and storms are anticipated to be highest on Friday with convection becoming less likely over the course of the weekend as high pressure conditions and drier air builds in over the forecast area. Temperatures through the end of the week and into the weekend will remain consistently above the seasonal average with highs in the 90s and heat index values exceeding 100 degrees.
AVIATION
(18Z TAFS)
Issued at 118 PM EDT Mon Jun 16 2025
Scattered storms slowly developing across inland NE FL and will impact GNV in the 18-21Z time frame before pushing towards the Atlantic Coastal TAF sites and have continued TEMPO groups in the 20-24Z time frame for gusty winds and potential MVFR conds, but timing remains low to moderate at this time. Convection fades after sunset with lingering mid/high clouds, but still expecting mainly VFR conds, except for the usual MVFR fog at VQQ in the 07-11Z time frame. Light Southwest surface winds develop again for Tuesday morning with SCT clouds around 2500 ft by 14-15Z, but not expecting widespread MVFR morning CIGS at this time.
MARINE
Issued at 153 PM EDT Mon Jun 16 2025
Little change expected as the Atlantic high pressure ridge will continue to extend its axis westward across the Florida peninsula this week, keeping a prevailing south to southwest wind flow across our area. Showers and thunderstorms will impact our local waters during the afternoon and evening hours, with isolated strong storms possible, bringing briefly gusty winds, frequent lightning strikes, and torrential downpours. Rain chances will decrease for the local waters Tuesday through Thursday. A weak front enters the southeast states late this week, resulting in increasing chances for afternoon and evening thunderstorms by Friday and Saturday.
Rip Currents: Borderline Moderate Risk of Rips will continue this week with surf/breakers generally in the 1-2 ft range, then briefly up to 2-3 ft during the daily sea breeze development.
PRELIMINARY POINT TEMPS/POPS
AMG 72 94 72 93 / 20 20 10 30 SSI 77 89 76 90 / 20 20 10 20 JAX 74 95 74 94 / 20 40 10 40 SGJ 74 92 75 92 / 20 30 10 30 GNV 72 94 73 96 / 20 50 10 40 OCF 72 95 73 95 / 20 30 10 40
JAX WATCHES/WARNINGS/ADVISORIES
FL...None.
GA...None.
AM...None.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| SAXG1 - Sapelo Island Reserve, GA | 21 mi | 55 min | SSE 14 | 87°F | 30.01 | 78°F | ||
| KBMG1 | 25 mi | 55 min | 84°F | 30.03 | ||||
| 41112 - Offshore Fernandina Beach, FL (132) | 30 mi | 29 min | 80°F | 2 ft | ||||
| FRDF1 - 8720030 - Fernandina Beach, FL | 32 mi | 55 min | SSE 12G | 87°F | 85°F | 30.01 | ||
| 41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA | 33 mi | 35 min | S 14G | 82°F | 82°F | 2 ft | 30.01 | 80°F |
Wind History for Fernandina Beach, FL
toggle option: (graph/table)
Link to 1 hour of 5 minute data for KBQK
Terminal Aerodrome Forecast (TAF) for KBQK
Wind History Graph: BQK
(wind in knots)
GEOS Local Image of Southeast
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Jacksonville, FL,
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