Marine Weather Net

Sebastian Inlet to Jupiter Inlet out 20nm Marine Forecast


TONIGHT

NE
WINDS
10 - 15
KNOTS

TUESDAY

E
WINDS
10 - 15
KNOTS

TUESDAY NIGHT

E
WINDS
15
KNOTS

WEDNESDAY

E
WINDS
15
KNOTS

The Marine Weather Forecast In Detail:
AMZ555 Forecast Issued: 300 PM EDT Mon Oct 18 2021

Tonight...Northeast Winds 10 To 15 Knots. Seas 3 To 5 Feet With Occasional Seas To 6 Feet With A Dominant Period 7 Seconds. A Light Chop On The Intracoastal Waters.
Tuesday...East Winds 10 To 15 Knots. Seas 3 To 5 Feet With Occasional Seas To 6 Feet With A Dominant Period 7 Seconds. A Moderate Chop On The Intracoastal Waters.
Tuesday Night...East Winds 15 Knots. Seas 3 To 5 Feet With Occasional Seas To 6 Feet With A Dominant Period 6 Seconds. A Light Chop On The Intracoastal Waters.
Wednesday...East Winds 15 Knots. Seas 3 To 5 Feet With Occasional Seas To 6 Feet. A Moderate Chop On The Intracoastal Waters.
Wednesday Night...East Winds 10 To 15 Knots. Seas 2 To 4 Feet With Occasional Seas To 5 Feet. A Light Chop On The Intracoastal Waters.
Thursday...East Winds 10 To 15 Knots. Seas 2 To 4 Feet With Occasional Seas To 5 Feet. A Moderate Chop On The Intracoastal Waters. Slight Chance Of Showers In The Afternoon.
Thursday Night...East Winds 10 To 15 Knots Becoming Southeast 5 To 10 Knots After Midnight. Seas 2 To 3 Feet. Slight Chance Of Showers.
Friday...East Winds 5 To 10 Knots. Seas 2 To 3 Feet. Chance Of Showers And Slight Chance Of Thunderstorms.
Friday Night...East Winds 5 To 10 Knots. Seas 2 To 3 Feet. Chance Of Showers And Slight Chance Of Thunderstorms.
Saturday...Northeast Winds 5 To 10 Knots. Seas 2 To 3 Feet. Chance Of Showers And Slight Chance Of Thunderstorms.
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Seas are provided as a range of the average height of the highest one third of the waves, along with the occasional height of the average highest ten percent of the waves. Synopsis for Atlantic coastal waters from Flagler Beach to Jupiter Inlet out 60 nm - AMZ500
300 PM EDT Mon Oct 18 2021

High pressure over the southeast U.S. today will slowly push east this week and away from the area, out over the western Atlantic. Wind flow from the northeast today will produce poor to hazardous boating conditions, especially in the Gulf Steam. Winds will become east Tuesday and Wednesday, then develop more of a southerly wind component late week, as the trailing ridge axis settles southward across Florida. Increased moisture from the south will bring scattered showers and storms Friday.

Gulf Stream Hazards: Northeast winds 15 knots, with seas 6 to 7 feet today.
The approximate location of the west wall of the Gulf Stream based on the Real Time Ocean Forecast System as of Sunday, October 17th.
43 nautical miles east of Ponce Inlet.
27 nautical miles east of Port Canaveral.
25 nautical miles east of Sebastian Inlet.
18 nautical miles east of Fort Pierce Inlet.
11 nautical miles east of Saint Lucie Inlet.
Area Forecast Discussion
National Weather Service Melbourne FL
256pm EDT Monday Oct 18 2021

Rest of Today - Tonight
Pleasant rest of the afternoon with temps in the low 80s, dropping into the upper 70s this evening. Marine stratocu will continue.nue moving onshore as cloud cover lessens after sunset. Not expecting it to be as cool tonight as it was this morning due to more easterly flow, but should still cool enough to classify as a nice Florida fall night. Winds become light enough through the night, allowing drainage flow to develop, occurring first inland and then along the coast late in the night.

Overnight lows in the mid to upper 60s for most locations, as normally cooler inland/rural spots drop into the low 60s, except for the barrier islands of the Space/Treasure Coasts where it will be in the low 70s due to persistent east wind.

Tuesday-Wednesday...High pressure over the Southeast U.S. will move east and offshore the Carolina coast by mid week. This will cause the wind flow to become more easterly, and remain breezy along the coast. There will be a thin band of moisture around 5K feet that will support scattered marine stratocumulus clouds, but airmass looks too dry to produce any rain. Max temps in the low to mid 80s Tuesday and mid 80s Wednesday with comfortable humidity.

Thursday-Sunday...(Modified Previous trailing ridge axis will slowly press southward and reach central FL Friday ahead of an approaching cold front pushing into the Deep South. As a result, low level flow will veer SE-S allowing moisture to return to our area. Rain chances should begin to increase Thursday, with a 20-25 percent chance, increasing Friday to 30 percent north and 40 percent south.

Upper-level support is not strong enough to produce a clean frontal passage, so the weak front should stall and wash out over south central FL this weekend. Some drying likely across northern sections this weekend where there is only a 20 percent chance of rain (or less), especially north of I-4. The highest rain chances (30-40 percent) will be south along the Treasure Coast.

Max temperatures will reach the upper 80s interior and mid 80s coast. Min temps will also tick upward due to easterly flow keeping mins in the lower 70s coast, while inland areas return to the mid to upper 60s.

Marine
Rest of Today - Tonight
Recent observations at Buoy 9 and 14 indicate seas have dropped to around 4 feet nearshore, and likely up to 5-6 feet in the Gulf Stream. Small craft should continue to exercise caution in the Gulf Stream through tonight. Seas will diminish to 3-5 feet late tonight. Breezy NE winds around 15 KT will decrease slightly to 10-13 KT after sunset.

Tuesday-Friday...High pressure over the Carolina coast on Tuesday will move east over the western Atlantic by mid week. This will cause winds to become east Tuesday and Wednesday, E-SE on Thursday, and SE-S on Friday.

Pressure gradient will gradually loosen, supporting 15 knots Tuesday, 12-15 knots Wednesday, around 10 knots on Thursday, and 5-10 knots Friday. Seas gradually subside from 3-5 feet Tuesday to 2-3 feet on Thursday and Friday. Increasing moisture from the south will bring scattered showers and isolated storms back into the forecast late this week.

NOAA Melbourne FL Office: Watches - Warnings - Advisories
FL...None. AM...None.