Altamaha Sound to Fernandina Beach FL Marine Forecast
| Today...North Winds 20 To 25 Knots, Diminishing To 15 To 20 Knots This Afternoon. Seas 6 To 9 Feet, Occasionally To 11 Feet. Wave Detail: East 9 Feet At 12 Seconds And Northeast 5 Feet At 8 Seconds. Intracoastal Waters Rough. |
| Tonight...North Winds 15 To 20 Knots. Seas 6 To 8 Feet, Occasionally To 10 Feet. Wave Detail: East 8 Feet At 13 Seconds. Intracoastal Waters Choppy. |
| Tuesday...North Winds 15 To 20 Knots, Diminishing To 10 To 15 Knots In The Afternoon. Seas 5 To 8 Feet, Occasionally To 10 Feet. Wave Detail: East 7 Feet At 13 Seconds And Northeast 3 Feet At 7 Seconds. Intracoastal Waters Choppy. |
| Tuesday Night...Northeast Winds 15 To 20 Knots. Seas 5 To 7 Feet, Occasionally To 9 Feet. Wave Detail: East 6 Feet At 13 Seconds And Northeast 4 Feet At 7 Seconds. Intracoastal Waters Choppy. |
| Wednesday And Wednesday Night...North Winds 15 To 20 Knots. Seas 4 To 6 Feet, Occasionally To 8 Feet. Wave Detail: East 5 Feet At 12 Seconds And Northeast 4 Feet At 7 Seconds. Intracoastal Waters Choppy. |
| Thursday...Northeast Winds 10 To 15 Knots. Seas 4 To 5 Feet, Occasionally To 6 Feet. Wave Detail: East 5 Feet At 12 Seconds And Northeast 2 Feet At 6 Seconds. Intracoastal Waters A Moderate Chop. |
| Friday...Northeast Winds 25 To 30 Knots. Seas 4 To 5 Feet, Occasionally To 6 Feet, Building To 6 To 9 Feet, Occasionally To 11 Feet. Intracoastal Waters Very Rough. A Slight Chance Of Showers Through The Night. |
| Area Forecast Discussion National Weather Service Jacksonville FL 710am EDT Monday Oct 19 2026 .KEY MESSAGES... For the latest NE FL and SE GA Daily Key Messages please visit: https:/www.weather.gov/media/jax/briefings/nws-jax-briefing.pdf - Marine & Coastal Hazards Today into This Week. Dangerous Surf Zone Conditions - High Risk for Rip Currents & Rough, High Surf. Gale Warning Portions of Atlantic Coastal Waters Early This Morning. Windy Today - Wind Gusts of around 35 mph at Coastal NE FL Locations. Minor Tidal Flooding in portions of ICWW & St. Johns River Basin through mid. Significant Beach Erosion Possible at Area Beaches During Times of High Tide Near Term - Through Tonight Main Highlights: - Moderate north to northeast winds continue today with gusts of 25- 35 mph, strongest gusts mainly for the coastal areas. - Coastal & Marine Hazards Continue with high rip current risk, rough surf, beach erosion, and minor tidal flooding during high tide - Below normal temperatures again today Still below normal temperatures today with moderately strong pressure gradient remaining in place between the high pressure system well to the north and the low pressure system in the western Atlantic. High temperatures will be in the 70s for most areas with partly to occasional mostly cloudy skies for large parts of the area giving way to more clearing in the afternoon and evening as dry air in the 1000-700 mb layer pushes southward over the region. However, still some small chances for showers at about 15-25 percent this morning for parts of St Johns, Flagler, Putnam, and eastern Marion counties through midday day before the drier air moves in. May still be quite a few clouds hanging around for St Johns and Flagler counties into the afternoon hours and partly into the overnight hours. Surface winds will still be up to 15-25 mph gusting to 30-35 mph for the northeast FL coastal areas, with winds inland diminishing to about 10-15 mph gusting to 25 mph. Tonight, becoming quite cool under clear skies and lighter north- northeast winds. Forecast minimums show temps dipping to mid to upper 40s for southeast GA to the Suwannee Valley, then to the lower to mid 50s for the rest of the area except for 60 deg at northeast FL the coastline. Short Term - Tuesday Through Wednesday Night Main Highligheights This Period: - Coastal & Marine Hazards To Continue into mid week with high rip current risk, rough surf, beach erosion, and minor tidal flooding. - Below normal temperatures this period. With a dry airmass over the area, dry conditions are expected to continue through midweek, but the continuing onshore flow could bring a few light showers along coastal locations. With Low pressure northeast of the area over the western Atlantic and high pressure stretching along the eastern CONUS, breezy to gusty conditions will remain through midweek along the local waters and coastal locations, though not as much as the past weekend. The persistent onshore flow will keep the coastal hazards going across the region, including high rip current risk, high and rough surf, gusty winds, and minor tidal flooding along the Atlantic coast and the St Johns River basin. Mostly clear and sunny conditions away from the coast will allow for temperatures to warm to the mid 70s on Tuesday, with a bit warmer midweek as temperatures will be from the mid 70s to lower 80s. Along the coast, highs will be in the lower to mid 70s. Overnight Lows will drop into the upper 40s across SE GA and the Suwannee Valley Region, while the rest of NE FL will be in the lower to upper 50s. Long Term - Thursday Through Sunday Main Highligheights This Period: - Coastal hazards including tidal flooding, gusty winds, elevated rip risk expected Cool and dry conditions will continue at the start of the forecast period for much of the area, with chances of showers along coastal locations during the upcoming weekend. Onshore northeasterly flow will also persist as due to low pressure off the mid-Atlantic coast and a high pressure ridge north of the area. The pressure gradient between the two features may begin to tighten on Friday afternoon, which would allow for stronger winds to become reestablish along the local waters and coastal locations through the upcoming weekend. This will keep the coastal hazards going across the region, including high rip current risk, high and rough surf, gusty winds, and minor tidal flooding along the Atlantic coast and the St Johns River basin. Temperatures will continue to be below the seasonal average through the end of the week. Marine A tight pressure gradient between high pressure over the eastern states and a strong low pressure well offshore over the western Atlantic will continue to support hazardous marine conditions across the area waters this week. Near gale force wind gusts and rough seas up 10 to 15 feet will persist today before easing slowly through mid week as the low offshore moves slowly northward. While Gale force conditions are ending early this morning, small craft advisory level conditions will continue into mid to late week. Rip Currents Have extended the high risk of rip currents through Wednesday for now given high confidence due to the strong onshore flow we have had and the fact we will see dangerous surf continuing greater than 3-4 ft Tuesday through Wednesday. Surf heigheights will be coming down gradually through today with high surf advisory dropped for southeast GA beaches later today and for northeast FL beaches Tuesday morning. Fire Weather - Elevated Nighttime Dispersions Along The Coast This Week Winds will begin to weaken a bit during the upcoming week, but breezy conditions along the coast still expected. Dispersions will also be elevated near the coastline during the upcoming week due to the persistent breezy onshore flow. With a dry airmass overhead, chances for showers remain very low over the next couple of days, with isolated showers possible along the coast. The dry air also will bring lower min RHs for far inland locations, currently expected to remain above critical levels, in the 30% range over SE GA and Suwannee Valley region of NE FL. FOG POTENTIAL AND OTHER WEATHER REMARKS: Fog formation is not expected through at least the next several days. Hydrology Minor flooding will continue along lower portions of the Satilla River during the next several days. Tides / Coastal Flooding Portions of the St. Johns basin from downtown Jacksonville southward, reached minor flood stage with yesterday evening's high tide cycle. Values peaked around 1.4 to 1.8 ft MHHW. For the forecast update, the coastal flood advisory was extended in time and also in area to cover part of Flagler and St Johns coastal areas based on a couple of gauge observations. With the persistent northeast flow leading into mid to late week, it appears probable that the minor flooding in the St Johns River Basin will continue until Friday and possibly into the weekend. Current average tidal departures between astronomical predictions and observations are running between 1-2 ft. Fortunately, we are not at a new or full moon phase. Next moon phase is a full moon on Sunday, Oct 25th. At least some minor to moderate beach erosion continues around times of high tide at area beaches, where breakers up to 6 to 10 feet are expected into this evening. NOAA Jacksonville FL Office: Watches - Warnings - Advisories FL...Coastal Flood Advisory until 8pm EDT Tuesday for FLZ038-132- 137-138-233-325-333-633. High Risk for Rip Currents through late Wednesday night for FLZ124- 125-138-233-333. High Surf Advisory until 10am EDT Tuesday for FLZ124-125-138- 233-333. GA...High Risk for Rip Currents through late Wednesday night for GAZ154- 166. High Surf Advisory until 9pm EDT this evening for GAZ154-166. Marine Small Craft Advisory until 8pm EDT Tuesday for AMZ450. Gale Warning until 8am EDT this morning for AMZ452-454-472- 474. Small Craft Advisory until 4am EDT Thursday for AMZ452-454- 472-474. Small Craft Advisory until 4am EDT Thursday for AMZ470.. |
Jacksonville Radar
Southeast Radar