Marine Weather and Tide Forecast for Port St. John, FL

December 5, 2023 8:23 PM EST (01:23 UTC)
Sunrise 6:59AM Sunset 5:27PM Moonrise 12:08AM Moonset 1:05PM
AMZ552 Volusia-brevard County Line To Sebastian Inlet 0-20 Nm- 257 Pm Est Tue Dec 5 2023
.small craft advisory in effect from late tonight through late Wednesday night...
Tonight..Northwest winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 2 to 3 feet. A dominant period 4 seconds. Choppy on the intracoastal waters.
Wednesday..Northwest winds 20 to 25 knots. Seas 4 to 6 feet with occasional seas to 7 feet. A dominant period 5 seconds. Rough on the intracoastal waters.
Wednesday night..North winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas to 7 feet. A dominant period 8 seconds. Choppy on the intracoastal waters.
Thursday..Northeast winds 10 to 15 knots, diminishing to 5 to 10 knots in the afternoon. Seas 3 to 5 feet with occasional seas to 6 feet. A moderate chop on the intracoastal waters.
Thursday night..East winds 5 to 10 knots. Seas 3 to 4 feet with occasional seas to 5 feet. Mostly smooth on the intracoastal waters.
Friday..Southeast winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 3 to 4 feet with occasional seas to 5 feet. A moderate chop on the intracoastal waters.
Friday night..Southeast winds 10 to 15 knots. Seas 3 to 4 feet with occasional seas to 5 feet. A slight chance of showers.
Saturday..Southeast winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas to 6 feet. A slight chance of showers.
Saturday night..South winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas to 6 feet. A slight chance of showers and Thunderstorms.
Sunday..Southwest winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas to 6 feet. A chance of showers and a slight chance of Thunderstorms.
winds and waves higher in and near Thunderstorms.
.small craft advisory in effect from late tonight through late Wednesday night...
Tonight..Northwest winds 10 to 15 knots, increasing to 15 to 20 knots after midnight. Seas 2 to 3 feet. A dominant period 4 seconds. Choppy on the intracoastal waters.
Wednesday..Northwest winds 20 to 25 knots. Seas 4 to 6 feet with occasional seas to 7 feet. A dominant period 5 seconds. Rough on the intracoastal waters.
Wednesday night..North winds 15 to 20 knots. Seas 4 to 6 feet with occasional seas to 7 feet. A dominant period 8 seconds. Choppy on the intracoastal waters.
Thursday..Northeast winds 10 to 15 knots, diminishing to 5 to 10 knots in the afternoon. Seas 3 to 5 feet with occasional seas to 6 feet. A moderate chop on the intracoastal waters.
Thursday night..East winds 5 to 10 knots. Seas 3 to 4 feet with occasional seas to 5 feet. Mostly smooth on the intracoastal waters.
Friday..Southeast winds 5 to 10 knots, increasing to 10 to 15 knots in the afternoon. Seas 3 to 4 feet with occasional seas to 5 feet. A moderate chop on the intracoastal waters.
Friday night..Southeast winds 10 to 15 knots. Seas 3 to 4 feet with occasional seas to 5 feet. A slight chance of showers.
Saturday..Southeast winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas to 6 feet. A slight chance of showers.
Saturday night..South winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas to 6 feet. A slight chance of showers and Thunderstorms.
Sunday..Southwest winds 10 to 15 knots. Seas 3 to 5 feet with occasional seas to 6 feet. A chance of showers and a slight chance of Thunderstorms.
winds and waves higher in and near Thunderstorms.
AMZ500 Synopsis For Flagler Beach To Jupiter Inlet Out To 60 Nm- 257 Pm Est Tue Dec 5 2023
Synopsis..A secondary surge of fresh northerly winds will overspread the local waters late tonight and Wednesday as low pressure develops off the eastern u.s. Coast. This will produce hazardous boating conditions, especially in the gulf stream where higher seas may linger into Thursday morning. Boating conditions are then forecast to improve only slightly later in the day Thursday as high pressure builds into the southeast u.s. The high pressure center will push offshore late this week as the next cold front approaches this weekend.
Gulf stream hazards..Northwest winds increasing to 20 knots with seas building to between 5 and 6 feet late tonight north of sebastian inlet.
the approximate location of the west wall of the gulf stream based on the real time ocean forecast system as of Sunday, december 3rd.
43 nautical miles east of ponce inlet. 28 nautical miles east of port canaveral. 23 nautical miles east of sebastian inlet. 15 nautical miles east of fort pierce inlet. 10 nautical miles east of saint lucie inlet.
Synopsis..A secondary surge of fresh northerly winds will overspread the local waters late tonight and Wednesday as low pressure develops off the eastern u.s. Coast. This will produce hazardous boating conditions, especially in the gulf stream where higher seas may linger into Thursday morning. Boating conditions are then forecast to improve only slightly later in the day Thursday as high pressure builds into the southeast u.s. The high pressure center will push offshore late this week as the next cold front approaches this weekend.
Gulf stream hazards..Northwest winds increasing to 20 knots with seas building to between 5 and 6 feet late tonight north of sebastian inlet.
the approximate location of the west wall of the gulf stream based on the real time ocean forecast system as of Sunday, december 3rd.
43 nautical miles east of ponce inlet. 28 nautical miles east of port canaveral. 23 nautical miles east of sebastian inlet. 15 nautical miles east of fort pierce inlet. 10 nautical miles east of saint lucie inlet.

Area Discussion for - Melbourne, FL
  (on/off)  HelpNOTE: mouseover dotted underlined text for definition
FXUS62 KMLB 052120 AFDMLB
Area Forecast Discussion National Weather Service Melbourne FL 420 PM EST Tue Dec 5 2023
DISCUSSION
Tonight/Wed...Considerable high cloudiness will continue to stream overhead tonight then begin decrease/thin on Wed as band of upper level moisture shifts southward. A cool/dry NW breeze will persist overnight with min temps in the upper 40s and lower 50s.
On Wed, deepening low pressure off the Carolina coast will swing a reinforcing cold front across the area early in the day. Breezy NW winds 15 to 20 mph with gusts to 25 mph will produce below normal temperatures not getting out of the 60s Wed aftn despite more sunshine than we have seen today.
Wednesday Night-Friday...Chilly overnight into Thursday morning as a large surface high over the southeast US advects cold air from the north. Early in the night, inland temperatures in the low to mid 50s and coastal temperatures in the mid 50s to around 60, drop into the low 40s north of I-4, mid 40 across the rest of the inland areas. Along the coast, winds slacken while becoming onshore late in the night, keeping lows in the 50s, except up north near Daytona where lows dip into the upper 40s. As the high tracks east, winds continue to veer from north to northeasterly on Thursday to east to southeasterly late Friday, bringing temperatures back up. Afternoon highs in the upper 60s to low 70s, and low to mid 70s Friday. Lows Thursday night in the low to mid 50s inland and mid 50s to around 60 along the coast, and in the 60 Friday night. Mostly dry conditions.
Saturday-Tuesday..Models still calling for a significant mid- upper level trough to develop over the central US Saturday, cross the eastern US Sunday, then swing up into Canada Monday as broad troughing across the CONUS (southwesterly flow over Florida)
follows. ECM remains much sharper with the trough than the GFS, digging all the way into GOMEX, but has a more neutral tilt this time around. This develops a surface low pressure system in the central US Saturday, whose cold front sweeps through Florida Sunday. Still seeing potential for strong to sever storms with the frontal passage. Model guidance still showing H85 winds 30-35 kts in the GFS and 35-45 kts in the ECM, and ensembles 25-35 kts, higher to the north. Bulk shear also remains favorable 40-50 kts across most of the peninsula. Limiting factor continues to be sufficient instability, especially if things trend towards the GFS. PoPs 50 pct on Sunday.
Otherwise, mostly dry and warming back up with highs in the mid to upper 70s, except a quick cool down Monday with highs in the upper 60s to mid 70s. Lows in the 60s Sunday morning cool off to the 50s, except from the Treasure Coast to Lake Okeechobee where they remain in the low to mid 60s. Mostly dry conditions other than the frontal passage.
MARINE
Issued at 354 PM EST Tue Dec 5 2023
Tonight/Wed...Low pressure will develop just offshore the Carolina coast and deepen as it lifts NE. This will sweep a reinforcing cold front across the waters late tonight and early Wed bringing Small Craft Advisory conditions to all the waters. NW winds increasing near 20 knots nearshore and 20 to 25 knots offshore.
Seas building 4 to 5 feet nearshore Wed and 6 to 8 feet offshore.
Wednesday Night-Saturday...Hazardous boating conditions continue into Thursday morning, and remain unfavorable going into the weekend. High pressure centered over the southeastern US Thursday, and extending over the local Atlantic waters, pushes offshore late Thursday. The next cold front approaches Florida Saturday.
Northerly winds 20-25 kts Wednesday night slacken and veer, becoming northeast 10-15 kts by Thursday morning. Winds continue to veer, becoming southeasterly Friday, and then southerly while increasing to 15-20 kts late Saturday. Seas up to 9 ft in the Gulf Stream late Wednesday subside to 4-6 ft Thursday afternoon. Seas 3-5 ft across the waters Friday and Saturday.
FIRE WEATHER
Issued at 354 PM EST Tue Dec 5 2023
Dry air and an increase in NW winds will produce fire sensitive conditions Wednesday, with minimum RH values dropping into the mid 30s with NW winds 15 mph with gusts around 25 mph. Min RH values will quickly recover starting Thursday in developing onshore flow.
AVIATION
(18Z TAFS)
Issued at 354 PM EST Tue Dec 5 2023
VFR. W to NW flow 5 to 10 knots tonight. Then NW flow increases 12-15 knots Wed aft 15Z with gusts 20-24 knots.
PRELIMINARY POINT TEMPS/POPS
DAB 49 63 47 67 / 0 0 0 0 MCO 53 64 47 69 / 0 0 0 0 MLB 53 67 51 71 / 0 0 0 10 VRB 53 69 53 72 / 0 0 10 10 LEE 49 63 42 67 / 0 0 0 0 SFB 50 64 46 69 / 0 0 0 0 ORL 53 65 47 69 / 0 0 0 0 FPR 53 69 52 72 / 0 0 10 10
MLB WATCHES/WARNINGS/ADVISORIES
FL...None.
AM...Small Craft Advisory from 4 AM Wednesday to 4 AM EST Thursday for AMZ550-552-570-572.
Small Craft Advisory from 7 AM Wednesday to 4 AM EST Thursday for AMZ555-575.
Area Forecast Discussion National Weather Service Melbourne FL 420 PM EST Tue Dec 5 2023
DISCUSSION
Tonight/Wed...Considerable high cloudiness will continue to stream overhead tonight then begin decrease/thin on Wed as band of upper level moisture shifts southward. A cool/dry NW breeze will persist overnight with min temps in the upper 40s and lower 50s.
On Wed, deepening low pressure off the Carolina coast will swing a reinforcing cold front across the area early in the day. Breezy NW winds 15 to 20 mph with gusts to 25 mph will produce below normal temperatures not getting out of the 60s Wed aftn despite more sunshine than we have seen today.
Wednesday Night-Friday...Chilly overnight into Thursday morning as a large surface high over the southeast US advects cold air from the north. Early in the night, inland temperatures in the low to mid 50s and coastal temperatures in the mid 50s to around 60, drop into the low 40s north of I-4, mid 40 across the rest of the inland areas. Along the coast, winds slacken while becoming onshore late in the night, keeping lows in the 50s, except up north near Daytona where lows dip into the upper 40s. As the high tracks east, winds continue to veer from north to northeasterly on Thursday to east to southeasterly late Friday, bringing temperatures back up. Afternoon highs in the upper 60s to low 70s, and low to mid 70s Friday. Lows Thursday night in the low to mid 50s inland and mid 50s to around 60 along the coast, and in the 60 Friday night. Mostly dry conditions.
Saturday-Tuesday..Models still calling for a significant mid- upper level trough to develop over the central US Saturday, cross the eastern US Sunday, then swing up into Canada Monday as broad troughing across the CONUS (southwesterly flow over Florida)
follows. ECM remains much sharper with the trough than the GFS, digging all the way into GOMEX, but has a more neutral tilt this time around. This develops a surface low pressure system in the central US Saturday, whose cold front sweeps through Florida Sunday. Still seeing potential for strong to sever storms with the frontal passage. Model guidance still showing H85 winds 30-35 kts in the GFS and 35-45 kts in the ECM, and ensembles 25-35 kts, higher to the north. Bulk shear also remains favorable 40-50 kts across most of the peninsula. Limiting factor continues to be sufficient instability, especially if things trend towards the GFS. PoPs 50 pct on Sunday.
Otherwise, mostly dry and warming back up with highs in the mid to upper 70s, except a quick cool down Monday with highs in the upper 60s to mid 70s. Lows in the 60s Sunday morning cool off to the 50s, except from the Treasure Coast to Lake Okeechobee where they remain in the low to mid 60s. Mostly dry conditions other than the frontal passage.
MARINE
Issued at 354 PM EST Tue Dec 5 2023
Tonight/Wed...Low pressure will develop just offshore the Carolina coast and deepen as it lifts NE. This will sweep a reinforcing cold front across the waters late tonight and early Wed bringing Small Craft Advisory conditions to all the waters. NW winds increasing near 20 knots nearshore and 20 to 25 knots offshore.
Seas building 4 to 5 feet nearshore Wed and 6 to 8 feet offshore.
Wednesday Night-Saturday...Hazardous boating conditions continue into Thursday morning, and remain unfavorable going into the weekend. High pressure centered over the southeastern US Thursday, and extending over the local Atlantic waters, pushes offshore late Thursday. The next cold front approaches Florida Saturday.
Northerly winds 20-25 kts Wednesday night slacken and veer, becoming northeast 10-15 kts by Thursday morning. Winds continue to veer, becoming southeasterly Friday, and then southerly while increasing to 15-20 kts late Saturday. Seas up to 9 ft in the Gulf Stream late Wednesday subside to 4-6 ft Thursday afternoon. Seas 3-5 ft across the waters Friday and Saturday.
FIRE WEATHER
Issued at 354 PM EST Tue Dec 5 2023
Dry air and an increase in NW winds will produce fire sensitive conditions Wednesday, with minimum RH values dropping into the mid 30s with NW winds 15 mph with gusts around 25 mph. Min RH values will quickly recover starting Thursday in developing onshore flow.
AVIATION
(18Z TAFS)
Issued at 354 PM EST Tue Dec 5 2023
VFR. W to NW flow 5 to 10 knots tonight. Then NW flow increases 12-15 knots Wed aft 15Z with gusts 20-24 knots.
PRELIMINARY POINT TEMPS/POPS
DAB 49 63 47 67 / 0 0 0 0 MCO 53 64 47 69 / 0 0 0 0 MLB 53 67 51 71 / 0 0 0 10 VRB 53 69 53 72 / 0 0 10 10 LEE 49 63 42 67 / 0 0 0 0 SFB 50 64 46 69 / 0 0 0 0 ORL 53 65 47 69 / 0 0 0 0 FPR 53 69 52 72 / 0 0 10 10
MLB WATCHES/WARNINGS/ADVISORIES
FL...None.
AM...Small Craft Advisory from 4 AM Wednesday to 4 AM EST Thursday for AMZ550-552-570-572.
Small Craft Advisory from 7 AM Wednesday to 4 AM EST Thursday for AMZ555-575.
Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | inHg | DewPt |
TRDF1 - 8721604 - Trident Pier, FL | 15 mi | 54 min | W 7G | 65°F | 75°F | 30.05 | ||
41113 - Cape Canaveral Nearshore, FL (143) | 18 mi | 58 min | 70°F | 1 ft | ||||
41009 - CANAVERAL 20 NM East of Cape Canaveral, FL | 36 mi | 34 min | WNW 12G | 70°F | 80°F | 2 ft | 30.08 | 50°F |
SIPF1 | 47 mi | 39 min | 8.9 | 67°F | 67°F | 30.03 |
toggle option: (graph/table)
Airport Reports
EDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Temp | DewPt | RH | inHg |
KTIX SPACE COAST RGNL,FL | 4 sm | 35 min | WNW 04 | 7 sm | Partly Cloudy | 63°F | 46°F | 55% | 30.09 | |
KTTS NASA SHUTTLE LANDING FACILITY,FL | 13 sm | 28 min | W 04 | 10 sm | A Few Clouds | 63°F | 50°F | 63% | 30.05 | |
KXMR CAPE CANAVERAL AFS SKID STRIP,FL | 15 sm | 28 min | WNW 06 | 10 sm | Clear | 66°F | 48°F | 52% | 30.05 | |
KCOF PATRICK AFB,FL | 21 sm | 28 min | WNW 07 | 10 sm | Clear | 66°F | 48°F | 52% | 30.05 | |
KMCO ORLANDO INTL,FL | 24 sm | 30 min | W 06 | 10 sm | Partly Cloudy | 63°F | 39°F | 42% | 30.10 |
Wind History from TIX
(wind in knots)Titusville
Click for Map
Tue -- 12:07 AM EST Moonrise
Tue -- 12:51 AM EST Last Quarter
Tue -- 01:12 AM EST 3.98 feet High Tide
Tue -- 07:01 AM EST Sunrise
Tue -- 01:05 PM EST Moonset
Tue -- 04:46 PM EST 3.95 feet Low Tide
Tue -- 05:25 PM EST Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Tue -- 12:07 AM EST Moonrise
Tue -- 12:51 AM EST Last Quarter
Tue -- 01:12 AM EST 3.98 feet High Tide
Tue -- 07:01 AM EST Sunrise
Tue -- 01:05 PM EST Moonset
Tue -- 04:46 PM EST 3.95 feet Low Tide
Tue -- 05:25 PM EST Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Titusville, Indian River, Florida, Tide feet
12 am |
4 |
1 am |
4 |
2 am |
4 |
3 am |
4 |
4 am |
4 |
5 am |
4 |
6 am |
4 |
7 am |
4 |
8 am |
4 |
9 am |
4 |
10 am |
4 |
11 am |
4 |
12 pm |
4 |
1 pm |
4 |
2 pm |
4 |
3 pm |
3.9 |
4 pm |
3.9 |
5 pm |
3.9 |
6 pm |
3.9 |
7 pm |
3.9 |
8 pm |
4 |
9 pm |
4 |
10 pm |
4 |
11 pm |
4 |
Canaveral Harbor Entrance
Click for Map
Tue -- 12:06 AM EST Moonrise
Tue -- 12:51 AM EST Last Quarter
Tue -- 01:03 AM EST 2.88 feet High Tide
Tue -- 07:00 AM EST Sunrise
Tue -- 07:06 AM EST 0.88 feet Low Tide
Tue -- 01:04 PM EST Moonset
Tue -- 01:17 PM EST 3.35 feet High Tide
Tue -- 05:25 PM EST Sunset
Tue -- 07:50 PM EST 0.64 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Tue -- 12:06 AM EST Moonrise
Tue -- 12:51 AM EST Last Quarter
Tue -- 01:03 AM EST 2.88 feet High Tide
Tue -- 07:00 AM EST Sunrise
Tue -- 07:06 AM EST 0.88 feet Low Tide
Tue -- 01:04 PM EST Moonset
Tue -- 01:17 PM EST 3.35 feet High Tide
Tue -- 05:25 PM EST Sunset
Tue -- 07:50 PM EST 0.64 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Canaveral Harbor Entrance, Florida, Tide feet
12 am |
2.7 |
1 am |
2.9 |
2 am |
2.8 |
3 am |
2.5 |
4 am |
2.1 |
5 am |
1.6 |
6 am |
1.1 |
7 am |
0.9 |
8 am |
1 |
9 am |
1.4 |
10 am |
1.9 |
11 am |
2.5 |
12 pm |
3 |
1 pm |
3.3 |
2 pm |
3.3 |
3 pm |
3 |
4 pm |
2.5 |
5 pm |
1.9 |
6 pm |
1.2 |
7 pm |
0.8 |
8 pm |
0.6 |
9 pm |
0.8 |
10 pm |
1.2 |
11 pm |
1.8 |
Melbourne, FL,

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