Marine Weather Net

Fernandina Beach to St. Augustine, FL 20 - 60 NM Marine Forecast


5 - 10


5 - 10


10 - 15


20 - 25

The Marine Weather Forecast In Detail:
AMZ472 Forecast Issued: 303 AM EST Fri Nov 22 2019

Today...South Winds 5 To 10 Knots Becoming West Southwest In The Afternoon, Then Becoming South Southwest In The Evening. Seas 2 To 4 Feet. Dominant Period 10 Seconds.
Tonight...South Southwest Winds 5 To 10 Knots. Seas 2 To 4 Feet. Dominant Period 10 Seconds.
Saturday...South Southwest Winds 10 To 15 Knots. Seas 3 To 4 Feet. Dominant Period 10 Seconds.
Saturday Night...Southwest Winds 20 To 25 Knots With Gusts To Around 35 Knots. Seas 5 To 7 Feet With Occasional Seas Up To 9 Feet. Dominant Period 10 Seconds Becoming 5 Seconds After Midnight. Showers Likely.
Sunday...West Northwest Winds 15 To 20 Knots. Seas 4 To 6 Feet With Occasional Seas Up To 8 Feet. Dominant Period 5 Seconds Increasing To 10 Seconds In The Afternoon. A Chance Of Showers.
Sunday Night...Northwest Winds 10 To 15 Knots. Seas 2 To 4 Feet.
Monday...West Northwest Winds 5 To 10 Knots. Seas 2 To 3 Feet.
Monday Night...West Winds Around 5 Knots Becoming Northwest After Midnight. Seas 1 To 2 Feet.
Tuesday...East Winds Around 5 Knots Becoming South In The Afternoon. Seas 1 To 2 Feet.
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AMZ400: Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm
303 AM EST Fri Nov 22 2019

Surface high pressure off of the southeast Atlantic coast will build offshore during the day Friday into Friday night. A cold front will then move across the local area waters late Saturday evening. After the frontal passage, high pressure will build east from the Gulf of Mexico and then over the area Monday before moving northeast of the area waters on Tuesday.

Gulf Stream
The approximate location of the west wall of the Gulf Stream as of Nov 21, 2019 at 1200 UTC...
- 57 nautical miles east of Flagler Beach.
- 65 nautical miles east of Saint Augustine Beach.
- 71 nautical miles east of Jacksonville Beach.
- 84 nautical miles east of St Simons Island.
Area Forecast Discussion
National Weather Service Jacksonville FL
631am EST Fri Nov 22 2019

Near Term - Through Tonight
Patchy dense fog is developing over most of the area with high level clouds helping to prevent the fog from becoming widespread at this time. Cool but near normal low temperatures are observed across the area with mid to upper 40s in SE GA and low to mid 50s over NE FL. Surface high pressure just to our ENE near southeast US coastal waters will move slowly to our east through the rest of today. Deep layer ridging aloft will push to the SE as the next cold front enters the SE region. Partly cloudy skies and light south to SW winds of 5-10 mph will allow temps to warm to just above normal ranges with mid 70s in SE GA, upper 70s for NE FL and low to mid 70s along the coast.

.SHORT TERM [Saturday Through Sunday]... High pressure will move to the southeast Saturday, resulting in a southwest flow, and temperatures moderating above normal. A cold front will move southeast across the region Saturday night. The best energy with this system will be well to the north, closer to the center of the low. So, at this time not expecting a significant chance for thunderstorms along what will likely be a broken line of showers. High pressure will build from the west Sunday. This will yield a flow from the northwest, with temperatures trending below seasonal averages. The high will build overhead on Monday, then to the east Tuesday. After another below normal day on Monday, temperatures will moderate to near seasonal averages Tuesday as the flow becomes more from the south southeast.

Long Term - Monday Through Friday
A cold frontal boundary will sink south across forecast area Tuesday night into Wednesday and weaken. The presence of this boundary will keep showers in the forecast. Strong high pressure will build from the north Thursday into Friday. The onshore flow pattern Thursday into Friday will yield the potential for showers as moisture moves in off the Atlantic, but most of this activity will be near the coast.

Temperatures are expected to trend above normal this period.

Low wave heigheights of 2-3 ft for near shore waters and 3-4 ft for offshore waters are expected. However, a long period swell will continue from the NE. For now only expecting a low risk of rip currents for NE FL and SE GA beaches.

Water levels continue peaking into action levels into Flagler and Putnam counties, but continue trending down. With very light winds expected to shift south to southwesterly Friday, water levels should continue to decrease across theses areas and will let the Coastal Flood Statement expire.

NOAA Jacksonville FL Office: Watches - Warnings - Advisories
FL...None. GA...None. AM...None.