Below Normal Temperatures Continue

A strong cold front will sweep through the East on Wednesday with heavy wet snow from the eastern Great Lakes into northern New England and strong thunderstorms with damaging winds in the Mid-Atlantic and Northeast. The big story though will continue to be the well below average temperatures behind this storm system or east of the Rockies, as numerous record low temperatures are likely.
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Jacksonville, FL Local Forecast Office

5NM WSW Saint Simons GA

Marine Point Forecast

[NOTICE]

Overnight

Light Wind
< 1ft
Low: 60 °F
Wednesday

W 12kt
< 1ft
High: 80 °F
Wednesday
Night
NW 12kt
< 1ft
Low: 48 °F
Thursday

N 11kt
< 1ft
High: 66 °F
Thursday
Night
ESE 6kt
< 1ft
Low: 52 °F
Friday

ESE 10kt
< 1ft
High: 71 °F
Friday
Night
SSE 9kt
< 1ft
Low: 63 °F
Saturday

S 15kt
< 1ft
High: 78 °F
Saturday
Night
SW 11kt
< 1ft
Low: 62 °F

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 12:10 am EDT Apr 21, 2021
Forecast Valid: 1am EDT Apr 21, 2021-6pm EDT Apr 27, 2021

View Nearby Observations

Detailed Forecast

Synopsis: A pre-frontal trough will move across the waters tonight then the cold front will cross the local waters Wednesday evening. Winds increase to Advisory levels over the outer waters Wednesday night into Thursday trailing frontal passage as high pressure builds northwest of the region. The high will build north then northeast of the local waters late Thursday through Friday. A warm front will lift north across the waters Friday night, thunderstorm potential increases Saturday as a cold front approaches from the west. This front will cross the waters Saturday night trailed by high pressure building north of the waters early next week.

.GULF STREAM...

The approximate location of the west wall of the Gulf Stream as of Apr 20, 2021 at 1200 UTC...

67 nautical miles east of Flagler Beach. 76 nautical miles east of Saint Augustine Beach. 84 nautical miles east of Jacksonville Beach. 92 nautical miles east southeast of St Simons Island.

This data courtesy of the Naval Oceanographic Office.

Overnight

Variable winds 5 kt or less. A slight chance of showers before 3am. Patchy fog before 3am. Seas 1 ft or less.

Wednesday

Variable winds less than 5 kt becoming W 7 to 12 kt in the morning. Winds could gust as high as 20 kt. Sunny. Seas 1 ft or less.

Wednesday Night

WNW wind around 12 kt becoming NNW after midnight. Winds could gust as high as 20 kt. Mostly clear. Seas 1 ft or less.

Thursday

N wind 8 to 11 kt becoming ENE in the afternoon. Winds could gust as high as 17 kt. Sunny. Seas 1 ft or less.

Thursday Night

ESE wind around 6 kt becoming variable and less than 5 kt after midnight. Clear. Seas 1 ft or less.

Friday

ENE wind 5 to 10 kt becoming ESE in the afternoon. Sunny. Seas 1 ft or less.

Friday Night

SSE wind around 9 kt. A chance of showers and thunderstorms. Seas 1 ft or less.

Saturday

S wind 10 to 15 kt, with gusts as high as 23 kt. Showers likely and possibly a thunderstorm. Seas 1 ft or less.

Saturday Night

SW wind 9 to 11 kt, with gusts as high as 17 kt. Showers likely and possibly a thunderstorm. Seas 1 ft or less.

*Notices:

This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.