Marine forecast
Altamaha Sound–Fernandina Beach (20-60 nm), GA
- current wind
- 4 kt N
- Gusts
- 6 kt
- Seas
- 1.3 ft
- Period
- 8 sec
- Air
- 78°F
Observed Tue 3:10 PM | AMZ470
- Gusts now
- 6 kt
- Seas now
- 1.3 ft · 8 sec
- Air
- 78°F
- 72-hr peak
- 9 kt
In brief
At 3:10 pm EDT on Oct 13, 2026, NDBC station 41008 (GRAYS REEF - 40 NM Southeast of Savannah, GA, 37 miles away) measured wind from the N at 4 kt, gusting to 6 kt; buoy 41112 measured seas of 1.3 ft. The NWS forecast for Altamaha Sound–Fernandina Beach (20-60 nm), GA issued at 2:26 pm EDT on Oct 13, 2026 reads, for rest of today: “Northeast winds 5 to 10 knots. Seas 2 to 3 feet.”
Source: National Weather Service Jacksonville FL forecast; NDBC observations
Wind forecast · ktPeak 9 kt
NWS marine forecast
| Period | Forecast |
|---|---|
| Rest Of Today | Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: North 2 feet at 6 seconds. |
| Tonight | Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Northeast 2 feet at 7 seconds. |
| Wednesday | Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: Northeast 3 feet at 7 seconds. |
| Wednesday Night | East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 7 seconds. |
| Thursday | East winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: East 3 feet at 7 seconds. |
| Thursday Night | East winds 5 to 10 knots, becoming south after midnight. Seas around 2 feet. Wave Detail: East 2 feet at 7 seconds. |
| Friday | West winds 5 to 10 knots, increasing to 25 to 30 knots. Seas 2 to 3 feet, building to 3 to 5 feet, occasionally to 6 feet after midnight. A slight chance of thunderstorms. A slight chance of showers. |
| Saturday | Northeast winds around 30 knots. Seas 5 to 8 feet, occasionally to 10 feet, building to 11 to 12 feet, occasionally to 15 feet. A slight chance of showers through the day. A chance of showers in the evening, then a slight chance of showers after midnight. Winds and seas higher in and near thunderstorms. |
Issued Tue 2:26 PM by Jacksonville FL (product CWFJAX).
Synopsis
A high pressure system over the southeast states will slowly move east, and push well offshore by Thursday night and Friday. A strong cold front will cross the local waters late Friday night through Saturday morning, followed by building high pressure well to the north. Lighter winds and seas will continue through at least Thursday. Deteriorating marine conditions expected Friday night and into the weekend with Small Craft Advisories likely and potential for Gale conditions.
Recent buoy conditions
| Time | Wind | Gust | Seas | Water |
|---|---|---|---|---|
| Tue 3:10 PM | 4 kt N | 6 kt | — | — |
| Tue 2:50 PM | — | — | 1.3 ft | — |
| Tue 1:50 PM | 6 kt N | 8 kt | 1.3 ft | — |
| Tue 12:50 PM | 8 kt N | 10 kt | 1.3 ft | — |
| Tue 11:50 AM | 8 kt N | 10 kt | 1.3 ft | — |
| Tue 10:50 AM | 8 kt N | 10 kt | 1.3 ft | — |
| Tue 9:50 AM | 8 kt N | 10 kt | 1.3 ft | — |
| Tue 8:50 AM | 8 kt N | 10 kt | 1.3 ft | — |
| Tue 7:50 AM | 8 kt NNE | 10 kt | 1.3 ft | — |
| Tue 6:50 AM | 10 kt N | 12 kt | 1.3 ft | — |
| Tue 5:50 AM | 10 kt N | 12 kt | 1.0 ft | — |
| Tue 4:50 AM | 8 kt NNW | 10 kt | 1.0 ft | — |
Observed Tue 3:10 PM at NDBC buoy 41008 (GRAYS REEF - 40 NM Southeast of Savannah, GA), 36.6 miles away. Seas from buoy 41112 (Offshore Fernandina Beach, FL (132)), 35.4 miles away, at Tue 2:56 PM.
Frequently asked questions
What is the marine forecast for Altamaha Sound–Fernandina Beach (20-60 nm) today?
Rest Of Today: Northeast winds 5 to 10 knots. Seas 2 to 3 feet. Wave Detail: North 2 feet at 6 seconds.
Is there a small craft advisory for Altamaha Sound–Fernandina Beach (20-60 nm)?
No advisories, warnings or watches are in effect for NWS zone AMZ470 as of the last update on this page. Advisories can be issued at any time; check the current bulletin before leaving the dock.
How high are the waves at Altamaha Sound–Fernandina Beach (20-60 nm) right now?
Seas are running 1.3 ft at a 8-second period, measured at NDBC buoy 41008 Tue 3:10 PM, 36.6 miles from this zone.
What do the wind speeds in knots mean?
One knot is 1.15 mph. The National Weather Service issues a small craft advisory for sustained winds of roughly 22–33 knots or hazardous seas, a gale warning at 34–47 knots, and a storm warning at 48 knots and above. Exact advisory thresholds vary by forecast office and by water body — a bay reaches dangerous chop at a lower wind speed than open ocean.
Where does this forecast come from?
The forecast text is the National Weather Service's own marine bulletin for zone AMZ470, issued by Jacksonville FL, reproduced in full. The wind and seas charts are drawn from the NWS gridded forecast for a point inside the zone. Observations come from the nearest reporting NDBC buoy. We are not affiliated with NOAA or the National Weather Service.
Forecast: NOAA/NWS product CWFJAX, issued Tue 2:26 PM. Observations: NOAA National Data Buoy Center station 41008, read Tue 3:10 PM. Retrieved Oct 13, 3:42 PM. Conditions offshore change faster than any page can be rebuilt, so check the current NWS bulletin and your own instruments before going out.