Marine Weather and Tide Forecast for St. Marys, GA
 | Sunrise 6:27 AM Sunset 8:18 PM Moonrise 12:34 AM Moonset 11:19 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- 135 Pm Edt Mon May 19 2025
Rest of today - East winds 5 to 10 knots, becoming southeast 10 to 15 knots this afternoon. Seas around 2 feet. Wave detail: southeast 2 feet at 4 seconds. Intracoastal waters a moderate chop.
Tonight - South winds 10 to 15 knots, becoming southwest after midnight. Seas 2 to 3 feet. Wave detail: southeast 2 feet at 4 seconds. Intracoastal waters a moderate chop.
Tuesday - Southwest winds around 5 knots, becoming southeast in the afternoon. Seas around 2 feet. Wave detail: southeast 2 feet at 4 seconds. Intracoastal waters light chop.
Tuesday night - South winds 10 to 15 knots, becoming southwest after midnight. Seas 2 to 3 feet. Wave detail: southeast 2 feet at 4 seconds. Intracoastal waters a moderate chop.
Wednesday - Southwest winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: southwest 2 feet at 4 seconds. Intracoastal waters a moderate chop. A chance of showers in the afternoon.
Wednesday night - West winds 10 to 15 knots. Seas 2 to 3 feet. Wave detail: west 2 feet at 4 seconds. Intracoastal waters a moderate chop.
Thursday - North winds 5 to 10 knots, becoming southwest. Seas around 2 feet. Intracoastal waters light chop. A slight chance of showers through the day.
Friday - Northwest winds 5 to 10 knots. Seas around 2 feet. Intracoastal waters light chop.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 135 Pm Edt Mon May 19 2025
Synopsis -
atlantic high pressure will weaken early this week, but will still extend its axis westward across the florida peninsula. Onshore winds for nearshore waters associated with the diurnal sea breeze will briefly surge from out of the south this evening before shifting to southwesterly and weakening overnight. A cold front will enter the southeastern states on Tuesday night and Wednesday, crossing our local waters on Wednesday evening. Scattered showers and Thunderstorms will accompany this frontal passage, with prevailing winds shifting to northwesterly by Thursday morning as this front pushes southward through the florida peninsula. High pressure will then build into the southeastern states late this week through the early portions of the memorial day weekend. A warm front may lift northeastward across our local waters by late in the upcoming weekend.
Gulf stream -
the approximate location of the west wall of the gulf stream as of may 17, 2025 at 1200 utc - .
65 nautical miles east of flagler beach. 80 nautical miles east of saint augustine beach. 89 nautical miles east of jacksonville beach. 99 nautical miles east southeast of st simons island.
this data courtesy of the naval oceanographic office.
atlantic high pressure will weaken early this week, but will still extend its axis westward across the florida peninsula. Onshore winds for nearshore waters associated with the diurnal sea breeze will briefly surge from out of the south this evening before shifting to southwesterly and weakening overnight. A cold front will enter the southeastern states on Tuesday night and Wednesday, crossing our local waters on Wednesday evening. Scattered showers and Thunderstorms will accompany this frontal passage, with prevailing winds shifting to northwesterly by Thursday morning as this front pushes southward through the florida peninsula. High pressure will then build into the southeastern states late this week through the early portions of the memorial day weekend. A warm front may lift northeastward across our local waters by late in the upcoming weekend.
the approximate location of the west wall of the gulf stream as of may 17, 2025 at 1200 utc - .
65 nautical miles east of flagler beach. 80 nautical miles east of saint augustine beach. 89 nautical miles east of jacksonville beach. 99 nautical miles east southeast of st simons island.
this data courtesy of the naval oceanographic office.
7 Day Forecast for Marine Location Near St. Marys, GA
NEW! Add second zone forecast
| St. Marys Click for Map Mon -- 01:34 AM EDT Moonrise Mon -- 02:33 AM EDT 6.39 feet High Tide Mon -- 06:28 AM EDT Sunrise Mon -- 08:57 AM EDT 1.10 feet Low Tide Mon -- 12:19 PM EDT Moonset Mon -- 03:01 PM EDT 5.73 feet High Tide Mon -- 08:16 PM EDT Sunset Mon -- 09:00 PM EDT 1.24 feet Low Tide Tide / Current data from XTide NOT FOR NAVIGATION |
St. Marys, St. Marys River, Florida, Tide feet
| 12 am |
| 4.8 |
| 1 am |
| 5.8 |
| 2 am |
| 6.3 |
| 3 am |
| 6.3 |
| 4 am |
| 5.8 |
| 5 am |
| 4.8 |
| 6 am |
| 3.4 |
| 7 am |
| 2.2 |
| 8 am |
| 1.4 |
| 9 am |
| 1.1 |
| 10 am |
| 1.5 |
| 11 am |
| 2.4 |
| 12 pm |
| 3.5 |
| 1 pm |
| 4.6 |
| 2 pm |
| 5.4 |
| 3 pm |
| 5.7 |
| 4 pm |
| 5.5 |
| 5 pm |
| 4.7 |
| 6 pm |
| 3.5 |
| 7 pm |
| 2.3 |
| 8 pm |
| 1.5 |
| 9 pm |
| 1.2 |
| 10 pm |
| 1.6 |
| 11 pm |
| 2.5 |
| St. Johns River Entrance Click for Map Mon -- 12:37 AM EDT 2.10 knots Max Flood Mon -- 01:33 AM EDT Moonrise Mon -- 03:44 AM EDT -0.00 knots Slack Mon -- 06:28 AM EDT -1.92 knots Max Ebb Mon -- 06:28 AM EDT Sunrise Mon -- 10:47 AM EDT 0.00 knots Slack Mon -- 12:19 PM EDT Moonset Mon -- 01:10 PM EDT 1.64 knots Max Flood Mon -- 04:02 PM EDT -0.00 knots Slack Mon -- 06:44 PM EDT -1.74 knots Max Ebb Mon -- 08:15 PM EDT Sunset Mon -- 10:39 PM EDT 0.00 knots Slack Tide / Current data from XTide NOT FOR NAVIGATION |
St. Johns River Entrance, Florida Current, knots
| 12 am |
| 1.9 |
| 1 am |
| 2 |
| 2 am |
| 1.5 |
| 3 am |
| 0.7 |
| 4 am |
| -0.3 |
| 5 am |
| -1.2 |
| 6 am |
| -1.9 |
| 7 am |
| -1.9 |
| 8 am |
| -1.6 |
| 9 am |
| -1.2 |
| 10 am |
| -0.7 |
| 11 am |
| 0.2 |
| 12 pm |
| 1.1 |
| 1 pm |
| 1.6 |
| 2 pm |
| 1.4 |
| 3 pm |
| 0.8 |
| 4 pm |
| 0 |
| 5 pm |
| -0.8 |
| 6 pm |
| -1.6 |
| 7 pm |
| -1.7 |
| 8 pm |
| -1.4 |
| 9 pm |
| -1 |
| 10 pm |
| -0.5 |
| 11 pm |
| 0.3 |
Area Discussion for Jacksonville, FL
Hide HelpNOTE: mouseover dotted underlined text for definition
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| FRDF1 - 8720030 - Fernandina Beach, FL | 5 mi | 48 min | SE 7G | 85°F | 80°F | 29.91 | ||
| KBMG1 | 5 mi | 48 min | 82°F | 29.93 | ||||
| 41112 - Offshore Fernandina Beach, FL (132) | 14 mi | 52 min | 80°F | 1 ft | ||||
| NFDF1 | 22 mi | 48 min | E 8G | 86°F | 29.91 | 76°F | ||
| BLIF1 | 23 mi | 48 min | E 8.9G | 85°F | 29.93 | |||
| DMSF1 | 23 mi | 48 min | 82°F | |||||
| MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL | 23 mi | 48 min | ESE 8G | 82°F | 80°F | 29.95 | ||
| LTJF1 | 24 mi | 48 min | 83°F | 75°F | ||||
| JXUF1 | 26 mi | 48 min | 83°F | |||||
| BKBF1 | 37 mi | 48 min | WNW 2.9G | 93°F | 29.91 | |||
| SAXG1 - Sapelo Island Reserve, GA | 50 mi | 48 min | SSE 11 | 86°F | 29.92 | 73°F | ||
| 41008 - GRAYS REEF - 40 NM Southeast of Savannah, GA | 59 mi | 38 min | SSE 9.7G | 80°F | 79°F | 29.93 | 76°F |
Wind History for Fernandina Beach, FL
toggle option: (graph/table)
Link to 1 hour of 5 minute data for KJAX
Terminal Aerodrome Forecast (TAF) for KJAX
Wind History Graph: JAX
(wind in knots)
GEOS Local Image of Southeast
Edit Hide
Jacksonville, FL,
NOTICE: Some pages have affiliate links to Amazon. As an Amazon Associate, I earn from qualifying purchases. Please read website Cookie, Privacy, and Disclamers by clicking HERE. To contact me click HERE. For my YouTube page click HERE