Marine Weather Net

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


TODAY

E
WINDS
10 - 15
KNOTS

TONIGHT

E
WINDS
5 - 10
KNOTS

MONDAY

NE
WINDS
5 - 10
KNOTS

MONDAY NIGHT

ESE
WINDS
5 - 10
KNOTS

The Marine Weather Forecast In Detail:
AMZ452 Forecast Issued: 259 AM EDT Sun Sep 22 2019

SMALL CRAFT EXERCISE CAUTION
Today...East Winds 10 To 15 Knots. Seas 4 To 6 Feet With Occasional Seas Up To 8 Feet. Dominant Period 12 Seconds. Inland Waters A Moderate Chop.
Tonight...East Winds 5 To 10 Knots. Seas 4 To 6 Feet With Occasional Seas Up To 8 Feet. Dominant Period 7 Seconds. Inland Waters A Light Chop.
Monday...Northeast Winds 5 To 10 Knots. Seas 3 To 5 Feet With Occasional Seas Up To 6 Feet. Dominant Period 12 Seconds. Inland Waters A Light Chop.
Monday Night...East Southeast Winds 5 To 10 Knots Becoming West Southwest After Midnight. Seas 3 To 5 Feet With Occasional Seas Up To 6 Feet. Dominant Period 11 Seconds. Inland Waters Smooth.
Tuesday...West Winds 5 To 10 Knots Becoming Southeast In The Afternoon. Seas 2 To 4 Feet. Dominant Period 10 Seconds. Inland Waters A Light Chop.
Tuesday Night...South Southwest Winds 10 To 15 Knots. Seas 3 To 4 Feet.
Wednesday...South Winds 10 To 15 Knots. Seas 2 To 4 Feet.
Wednesday Night...South Winds 10 To 15 Knots. Seas 2 To 4 Feet.
Thursday...South Winds 10 To 15 Knots. Seas 2 To 4 Feet.
SHARE THIS PAGE:           
AMZ400: Synopsis for Altamaha Sound GA to Flagler Beach FL out to 60 nm
259 AM EDT Sun Sep 22 2019

Strong high pressure to the north will weaken today and drop south over the waters this week with light winds developing. A long period easterly swell will continue to move into the area from several tropical systems over the western Atlantic.

Gulf Stream
The approximate location of the west wall of the Gulf Stream as of Sep 21, 2019 at 1200 UTC...
- 57 nautical miles east of Flagler Beach.
- 63 nautical miles east of Saint Augustine Beach.
- 73 nautical miles east of Jacksonville Beach.
- 97 nautical miles east southeast of St Simons Island.
Area Forecast Discussion
National Weather Service Jacksonville FL
304am EDT Sunday September 22 2019

Near Term - Today and Tonight
Surface ridge to the north will weaken today along with slowly decreasing winds...though onshore winds will still be gusty near the coast. Drier air over the area will only allow a few sprinkles this morning off the Atlantic as shower activity has ended. High temperatures today will be in the mid/upper 80s with lows tonight ranging from the low 60s well inland to the low 70s coast.

.SHORT TERM (Monday-Tuesday night)...Warming trend will take place as High pressure aloft gets shunted towards the south across the FL peninsula and Eastern GOMEX. This will shift the steering flow from the current onshore /E-NE/ pattern towards a hotter offshore /W-NW/ pattern. This will lead to temps reaching above normal values into the lower to middle 90s by Tuesday, although overnight lows will stay closer to climo values in the 60s with the generally drier airmass in place and lack of any rainfall. Other than above normal temps in the afternoon hours, any weather impacts will remain limited to some patchy late night/early morning fog over inland areas.

.LONG TERM (Wednesday-Saturday)...Generally quiet conditions expected through the period with High Pressure aloft, while weak surface high pressure ridge over the region will rebuild over the Carolinas by next weekend. The well above normal temps in the lower to middle 90s with the offshore steering flow for Wed/Thu becomes slowly onshore towards the weekend and this will lead to a slight cooling trend along the coastal areas with highs back in the 80s along with the chance of a few coastal showers, while highs over inland areas remain close to 90 degrees. Weather impacts will be limited through the period with possible late night inland/early morning fog at times.

Marine
Subsiding trend in winds and seas will continue through tonight as high pressure ridge to the north weakens and shifts south. Will continue Advisory for the northeast Florida offshore waters through tonight mainly due to seas which will be slower to subside than winds. Long period swells will persist through the week with combined seas in 3-5 foot range.

Rip Currents
Moderate risk today for Ga coast and High risk for Fl waters where winds and breakers will be higher. Moderate risk for all waters on Monday as winds decrease but swells linger.

NOAA Jacksonville FL Office: Watches - Warnings - Advisories
FL...High Rip Current Risk through this afternoon for Coastal Duval- Coastal Flagler-Coastal Nassau-Coastal St. Johns. GA...None. AM...Small Craft Advisory until 5am EDT early this morning for 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.