Marine Weather Net

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


REST OF TONIGHT

S
WINDS
10 - 15
KNOTS

SUNDAY

S
WINDS
10 - 15
KNOTS

SUNDAY NIGHT

S
WINDS
10 - 15
KNOTS

MONDAY

S
WINDS
5 - 10
KNOTS

The Marine Weather Forecast In Detail:
AMZ472 Forecast Issued: 747 PM EDT Sat Jul 13 2024

Rest Of Tonight...South Winds 10 To 15 Knots. Seas 3 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Southeast 3 Feet At 8 Seconds. A Slight Chance Of Thunderstorms. A Chance Of Showers, Mainly Early.
Sunday...Southwest Winds 5 To 10 Knots, Becoming South 10 To 15 Knots In The Afternoon. Seas 3 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Southeast 3 Feet At 8 Seconds. A Slight Chance Of Showers And Thunderstorms.
Sunday Night...South Winds 10 To 15 Knots. Seas 3 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Southeast 4 Feet At 8 Seconds And South 2 Feet At 4 Seconds. A Slight Chance Of Showers And Thunderstorms.
Monday...South Winds 5 To 10 Knots. Seas 3 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Southeast 4 Feet At 9 Seconds. A Chance Of Showers And Thunderstorms.
Monday Night...South Winds 10 To 15 Knots. Seas 3 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Southeast 4 Feet At 9 Seconds. A Chance Of Showers And Thunderstorms.
Tuesday...South Winds 5 To 10 Knots. Seas 3 To 4 Feet, Occasionally To 5 Feet. Wave Detail: Southeast 4 Feet At 9 Seconds. A Chance Of Showers With A Slight Chance Of Thunderstorms.
Tuesday Night...South Winds 10 To 15 Knots. Seas Around 3 Feet. A Chance Of Showers And Thunderstorms, Mainly In The Evening.
Wednesday...South Winds 10 To 15 Knots. Seas Around 3 Feet. Showers Likely In The Morning. A Chance Of Thunderstorms. A Chance Of Showers. A Slight Chance Of Thunderstorms After Midnight.
Thursday...South Winds 10 To 15 Knots. Seas Around 3 Feet. A Chance Of Showers. A Slight Chance Of Thunderstorms In The Morning, Then A Chance Of Thunderstorms. Winds And Seas Higher In And Near Thunderstorms.
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Area Forecast Discussion
National Weather Service Jacksonville FL
800pm EDT Sat July 13 2024

Near Term
Issued at 202pm EDT Sat July 13 2024

For the latest NE FL and SE GA Daily Key Messages please visit: https://www.weather.gov/media/jax/briefings/nws-jax-briefing.pdf

Rest of this afternoon...Slight increase in deeper moisture aloft over NE FL to the south of the I-10 corridor still on track to interact with sea breeze fronts and should lead to scattered to numerous showers and storms through sunset with slow and erratic storm movement and some heavy downpours as the main threat. Along the I-10 corridor and points northward across SE GA still have some lingering drier airmass aloft and will likely only see widely scattered showers and storms through the evening hours. Heat indices still expected to peak in the 104-108F range as convection gets started during the mid-late afternoon hours as temps reach well into the 90s area-wide.

Tonight...Later start to some convection and outflows/sea breeze interaction will likely lead to at least isolated showers and storms over inland areas until around midnight tonight. Otherwise fair skies with some leftover convective debris clouds in the mid/upper levels and humid conditions overnight with lows in the lower/middle 70s inland and upper 70s to near 80 along the Atlantic Coastal areas and St. Johns River Basin.

.SHORT TERM... (Sunday through Monday night) Issued at 202pm EDT Sat July 13 2024

The area will remain on the western periphery of a Bermuda high maintaining light south-southwesterly flow. The Atlantic sea breeze will likely only shift to the I-95 corridor each day. Scattered to numerous showers and storms developing along the sea breezes on Sunday will be mainly focused in NE FL and coastal SE GA. Coverage then increases to area-wide on Monday as low-level tropical moisture (PWATs (Precipitable Waters) 2+ in.) spreads back northward. Hot daytime temperatures are expected in the mid/upper 90s. With dewpoints in the 70s, heat indices could rise into the 103-108 F range on Sunday. Heat Advisory conditions may be possible on Monday.

Long Term
(Tuesday through Friday) Issued at 202pm EDT Sat July 13 2024

Summertime pattern of numerous showers and storms developing each afternoon along the sea breezes continues into mid-week. A frontal boundary starts to drop southward towards northern GA by Thursday and Friday, which could bring the potential for more widespread rain chances for the area. High temperatures lower slightly into the low/mid 90s due to area-wide convection each day.

Marine
Issued at 202pm EDT Sat July 13 2024

Bermuda high pressure will remain the dominant feature into next week resulting in generally light southerly flow. Daily surges of south-southeasterly winds develop across the nearshore waters with the development of the afternoon sea breeze. Seas will gradually build through the weekend into early next week as a modest onshore swell reaches the local waters. Scattered to numerous showers and thunderstorms will be possible during the afternoon and early evening hours each day.

Rip Currents
A Moderate Risk of Rip Currents continues at all local beaches this weekend.

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