Marine Weather and Tide Forecast for Port St. John, FL
![]() | Sunrise 6:31 AM Sunset 8:24 PM Moonrise 6:54 PM Moonset 4:04 AM |
Marine Forecasts
NOTE: Zones were updated 3/20/2025. If your report is out of date, please click Edit
AMZ552 Volusia-brevard County Line To Sebastian Inlet 0-20 Nm- 212 Am Edt Wed Jul 9 2025
Today - South winds around 5 knots, becoming southeast late this morning and afternoon. Seas 1 to 2 feet. Wave detail: east 2 feet at 9 seconds and east 1 foot at 4 seconds. A light chop on the intracoastal waters. A slight chance of showers and Thunderstorms this morning, then a chance of showers and Thunderstorms this afternoon.
Tonight - South winds 5 to 10 knots. Seas 2 feet. Wave detail: east 2 feet at 7 seconds. Mostly smooth on the intracoastal waters. A slight chance of showers and Thunderstorms.
Thursday - South winds 5 to 10 knots, becoming southeast in the afternoon. Seas 2 to 3 feet. Wave detail: east 3 feet at 8 seconds. A light chop on the intracoastal waters. A chance of showers and Thunderstorms.
Thursday night - South winds 5 to 10 knots. Seas 2 to 3 feet. Wave detail: east 3 feet at 8 seconds. Mostly smooth on the intracoastal waters. A chance of showers and Thunderstorms in the evening, then a slight chance of showers and Thunderstorms after midnight.
Friday - South winds 5 to 10 knots. Seas 2 to 3 feet. Wave detail: east 3 feet at 9 seconds. A light chop on the intracoastal waters. A chance of showers and Thunderstorms.
Friday night - South winds 5 to 10 knots. Seas 2 to 3 feet. Wave detail: east 3 feet at 9 seconds. Mostly smooth on the intracoastal waters. A chance of showers and Thunderstorms in the evening, then a slight chance of showers and Thunderstorms after midnight.
Saturday - South winds around 5 knots, becoming southeast in the afternoon. Seas 2 feet. A light chop on the intracoastal waters. A chance of showers and Thunderstorms.
Saturday night - South winds 5 to 10 knots, becoming southwest after midnight. Seas 2 feet. Mostly smooth on the intracoastal waters. A chance of showers and Thunderstorms in the evening, then a slight chance of showers and Thunderstorms after midnight.
Sunday - Southwest winds around 5 knots, becoming southeast in the afternoon. Seas 2 feet. A light chop on the intracoastal waters. A chance of showers and Thunderstorms.
Sunday night - Southwest winds 5 to 10 knots. Seas 1 to 2 feet. Mostly smooth on the intracoastal waters. A chance of showers and Thunderstorms in the evening, then a slight chance of showers and Thunderstorms after midnight.
winds and waves higher in and near Thunderstorms.
winds and waves higher in and near Thunderstorms.
AMZ500 1031 Am Edt Tue May 6 2025
synopsis for flagler beach to jupiter inlet fl out 60 nm
Synopsis - A weak frontal boundary stalled across or just north of the local atlantic waters remains in place through midweek. The front will then lift late in the week as high pressure builds across the tropical atlantic and over the area. Offshore moving showers and storms are expected each afternoon and evening which will be capable of wind gusts in excess of 34kts, frequent lightning, and heavy rainfall.
Gulf stream hazards - None.
the approximate location of the west wall of the gulf stream based on the real time ocean forecast system as of Monday, may 5th, 2025.
40 nautical miles east of ponce inlet. 27 nautical miles east of port canaveral. 20 nautical miles east of sebastian inlet. 12 nautical miles east of fort pierce inlet. 7 nautical miles east of saint lucie inlet.
synopsis for flagler beach to jupiter inlet fl out 60 nm
the approximate location of the west wall of the gulf stream based on the real time ocean forecast system as of Monday, may 5th, 2025.
40 nautical miles east of ponce inlet. 27 nautical miles east of port canaveral. 20 nautical miles east of sebastian inlet. 12 nautical miles east of fort pierce inlet. 7 nautical miles east of saint lucie inlet.
7 Day Forecast for Marine Location Near Port St. John, FL

NEW! Add second zone forecast
Titusville Click for Map Tue -- 03:38 AM EDT 3.62 feet High Tide Tue -- 04:11 AM EDT Moonset Tue -- 06:32 AM EDT Sunrise Tue -- 10:46 AM EDT 3.58 feet Low Tide Tue -- 04:24 PM EDT 3.60 feet High Tide Tue -- 07:00 PM EDT Moonrise Tue -- 08:24 PM EDT Sunset Tue -- 11:04 PM EDT 3.58 feet Low Tide Tide / Current data from XTide NOT FOR NAVIGATION |   |
Titusville, Indian River, Florida, Tide feet
12 am |
3.6 |
1 am |
3.6 |
2 am |
3.6 |
3 am |
3.6 |
4 am |
3.6 |
5 am |
3.6 |
6 am |
3.6 |
7 am |
3.6 |
8 am |
3.6 |
9 am |
3.6 |
10 am |
3.6 |
11 am |
3.6 |
12 pm |
3.6 |
1 pm |
3.6 |
2 pm |
3.6 |
3 pm |
3.6 |
4 pm |
3.6 |
5 pm |
3.6 |
6 pm |
3.6 |
7 pm |
3.6 |
8 pm |
3.6 |
9 pm |
3.6 |
10 pm |
3.6 |
11 pm |
3.6 |
Canaveral Harbor Entrance Click for Map Tue -- 12:41 AM EDT 0.82 feet Low Tide Tue -- 04:11 AM EDT Moonset Tue -- 06:19 AM EDT 2.81 feet High Tide Tue -- 06:31 AM EDT Sunrise Tue -- 12:16 PM EDT 0.23 feet Low Tide Tue -- 06:58 PM EDT Moonrise Tue -- 07:05 PM EDT 4.08 feet High Tide Tue -- 08:23 PM EDT Sunset Tide / Current data from XTide NOT FOR NAVIGATION |   |
Canaveral Harbor Entrance, Florida, Tide feet
12 am |
0.9 |
1 am |
0.8 |
2 am |
1 |
3 am |
1.4 |
4 am |
1.9 |
5 am |
2.5 |
6 am |
2.8 |
7 am |
2.7 |
8 am |
2.4 |
9 am |
1.9 |
10 am |
1.2 |
11 am |
0.6 |
12 pm |
0.3 |
1 pm |
0.3 |
2 pm |
0.8 |
3 pm |
1.4 |
4 pm |
2.3 |
5 pm |
3.2 |
6 pm |
3.8 |
7 pm |
4.1 |
8 pm |
3.9 |
9 pm |
3.5 |
10 pm |
2.7 |
11 pm |
1.9 |
Area Discussion for Melbourne, FL
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FXUS62 KMLB 090508 AFDMLB
Area Forecast Discussion National Weather Service Melbourne FL 108 AM EDT Wed Jul 9 2025
New KEY MESSAGES, DISCUSSION, MARINE, AVIATION
KEY MESSAGES
Issued at 108 AM EDT Wed Jul 9 2025
- Scattered late afternoon and evening storms today, particularly over the interior. Frequent lightning, gusty winds to 35-45 mph, and locally heavy rain will accompany the strongest storms.
- Near-normal to slightly above-normal temperatures and humidity persist each afternoon. With peak heat index values of 100-106F, visitors and residents will need to stay hydrated and seek breaks in the shade or A/C.
- Scattered storms remain in the forecast each day, but overall coverage may increase next week as a slow-moving disturbance approaches the state.
DISCUSSION
Issued at 108 AM EDT Wed Jul 9 2025
-----------Synoptic Overview-----------
Florida's weather continues to be strongly influenced by an area of deep-layer high pressure extending across the subtropics from the W Atlantic to the Desert Southwest. Tucked beneath the upper high is a weak wave of energy immediately northeast of the Bahamas. In the westerlies, a low-amplitude trough is pushing into the Ohio Valley.
Total moisture values are near normal for early July.
Over the next several days, little change to the synoptic pattern is forecast. The easterly wave in the Atlantic is expected to be redirected northward, generally not impacting local weather. Upper ridging remains firmly overhead. However, the weak trough well to our north may be enough to briefly oscillate the near-surface ridge axis toward South Florida on Thursday and Friday before it shifts slightly north toward Central Florida again this weekend.
Regardless, pressure patterns are loose; this suggests that the sea breezes should be able to form each day.
08/12Z ensemble cluster analysis continues to show a TUTT (tropical upper tropospheric trough) approaching the Bahamas sometime in the first half of next week. More importantly, several members also suggest that a well-defined mid-level wave will transit slowly westward across Florida. Coincident with this, the surface ridge axis is forecast to shift southward as moisture increases.
-------Sensible Weather & Impacts-------
Today...
The overall setup is fairly unchanged from yesterday, and HRRR members seem to have high confidence in the evolution of scattered storms today. Aside from some isolated activity on the advancing sea breeze, we anticipate that the majority of showers and storms will be focused over the interior (50-60%) this afternoon and early evening, with lesser chances (30-50%) along the coast. Mid-level lapse rates look more impressive, leading to strong instability.
Brief wind gusts to 45 mph, frequent lightning, and torrential rain due to slow storm motions remain the primary threats. Seasonably hot and humid with heat indices reaching up to around 106 deg F.
Thursday-Weekend...
Surface high pressure slips a little farther south on Thursday and Friday, however, prevailing light winds will allow sea breeze formation each day. The focus of showers and storms looks a little closer to the coast and across South Central Florida on Thursday and Friday, with members now indicating somewhat drier air closer to the I-4 corridor.
This weekend, the surface ridge axis is forecast to return northward toward Central Florida. Seasonable coverage of afternoon and evening storms, mainly focused over the interior, can be expected.
Quick heating in the morning and early afternoon will allow heat indices to bounce up to as high as 106 deg F. Those working or playing outdoors should know the signs of heat illness and never leave children or pets in unattended vehicles.
Early Next Week...
A pattern change still appears to be favored as disturbances approach from the Atlantic, forcing the surface high southward while enhancing local moisture convergence. This should introduce higher coverage of showers and storms across Central Florida. This unsettled setup may last well into next week.
MARINE
Issued at 108 AM EDT Wed Jul 9 2025
Surface high pressure will remain over Central Florida and the adjacent Atlantic waters today before slipping toward South Florida late in the work week. While stronger storms should mostly remain over land, a few showers and storms are in the forecast, particularly in the overnight and morning hours. This weekend, the high shifts back toward Central Florida. The sea breeze should form each day, enhancing southeast winds at the coast. Generally favorable boating conditions persist.
Seas 1-3 FT through the weekend. Southerly-component winds (SE off the Treasure Coast, and more SW north of Cape Canaveral) up to 12 KT each day, turning onshore at the coast in the afternoon.
AVIATION
(06Z TAFs)
Issued at 108 AM EDT Wed Jul 9 2025
VFR conditions forecast through the early morning hours, with light and variable winds picking up out of the WSW after 15Z. The ECSB is forecast to develop and move inland late morning/early afternoon, with winds backing to out of the ESE along the coast and at all interior terminals except LEE. VCTS possible along the sea breeze, with greatest coverage focused across the interior after 20Z following the sea breeze collision. Have added TEMPOs at MCO, ISM, and SFB for MVFR conditions due to TSRA between 20-24Z. Activity is forecast to diminish after 02Z, with winds once again becoming light and variable at all terminals.
PRELIMINARY POINT TEMPS/POPS
DAB 90 75 91 75 / 60 40 60 10 MCO 94 76 93 77 / 60 40 60 20 MLB 90 76 91 76 / 40 20 50 20 VRB 90 73 91 73 / 40 20 50 20 LEE 91 76 92 76 / 60 50 50 10 SFB 93 76 93 77 / 60 50 60 20 ORL 93 76 93 77 / 60 40 60 20 FPR 90 73 91 74 / 40 20 50 20
MLB WATCHES/WARNINGS/ADVISORIES
FL...None.
AM...None.
Area Forecast Discussion National Weather Service Melbourne FL 108 AM EDT Wed Jul 9 2025
New KEY MESSAGES, DISCUSSION, MARINE, AVIATION
KEY MESSAGES
Issued at 108 AM EDT Wed Jul 9 2025
- Scattered late afternoon and evening storms today, particularly over the interior. Frequent lightning, gusty winds to 35-45 mph, and locally heavy rain will accompany the strongest storms.
- Near-normal to slightly above-normal temperatures and humidity persist each afternoon. With peak heat index values of 100-106F, visitors and residents will need to stay hydrated and seek breaks in the shade or A/C.
- Scattered storms remain in the forecast each day, but overall coverage may increase next week as a slow-moving disturbance approaches the state.
DISCUSSION
Issued at 108 AM EDT Wed Jul 9 2025
-----------Synoptic Overview-----------
Florida's weather continues to be strongly influenced by an area of deep-layer high pressure extending across the subtropics from the W Atlantic to the Desert Southwest. Tucked beneath the upper high is a weak wave of energy immediately northeast of the Bahamas. In the westerlies, a low-amplitude trough is pushing into the Ohio Valley.
Total moisture values are near normal for early July.
Over the next several days, little change to the synoptic pattern is forecast. The easterly wave in the Atlantic is expected to be redirected northward, generally not impacting local weather. Upper ridging remains firmly overhead. However, the weak trough well to our north may be enough to briefly oscillate the near-surface ridge axis toward South Florida on Thursday and Friday before it shifts slightly north toward Central Florida again this weekend.
Regardless, pressure patterns are loose; this suggests that the sea breezes should be able to form each day.
08/12Z ensemble cluster analysis continues to show a TUTT (tropical upper tropospheric trough) approaching the Bahamas sometime in the first half of next week. More importantly, several members also suggest that a well-defined mid-level wave will transit slowly westward across Florida. Coincident with this, the surface ridge axis is forecast to shift southward as moisture increases.
-------Sensible Weather & Impacts-------
Today...
The overall setup is fairly unchanged from yesterday, and HRRR members seem to have high confidence in the evolution of scattered storms today. Aside from some isolated activity on the advancing sea breeze, we anticipate that the majority of showers and storms will be focused over the interior (50-60%) this afternoon and early evening, with lesser chances (30-50%) along the coast. Mid-level lapse rates look more impressive, leading to strong instability.
Brief wind gusts to 45 mph, frequent lightning, and torrential rain due to slow storm motions remain the primary threats. Seasonably hot and humid with heat indices reaching up to around 106 deg F.
Thursday-Weekend...
Surface high pressure slips a little farther south on Thursday and Friday, however, prevailing light winds will allow sea breeze formation each day. The focus of showers and storms looks a little closer to the coast and across South Central Florida on Thursday and Friday, with members now indicating somewhat drier air closer to the I-4 corridor.
This weekend, the surface ridge axis is forecast to return northward toward Central Florida. Seasonable coverage of afternoon and evening storms, mainly focused over the interior, can be expected.
Quick heating in the morning and early afternoon will allow heat indices to bounce up to as high as 106 deg F. Those working or playing outdoors should know the signs of heat illness and never leave children or pets in unattended vehicles.
Early Next Week...
A pattern change still appears to be favored as disturbances approach from the Atlantic, forcing the surface high southward while enhancing local moisture convergence. This should introduce higher coverage of showers and storms across Central Florida. This unsettled setup may last well into next week.
MARINE
Issued at 108 AM EDT Wed Jul 9 2025
Surface high pressure will remain over Central Florida and the adjacent Atlantic waters today before slipping toward South Florida late in the work week. While stronger storms should mostly remain over land, a few showers and storms are in the forecast, particularly in the overnight and morning hours. This weekend, the high shifts back toward Central Florida. The sea breeze should form each day, enhancing southeast winds at the coast. Generally favorable boating conditions persist.
Seas 1-3 FT through the weekend. Southerly-component winds (SE off the Treasure Coast, and more SW north of Cape Canaveral) up to 12 KT each day, turning onshore at the coast in the afternoon.
AVIATION
(06Z TAFs)
Issued at 108 AM EDT Wed Jul 9 2025
VFR conditions forecast through the early morning hours, with light and variable winds picking up out of the WSW after 15Z. The ECSB is forecast to develop and move inland late morning/early afternoon, with winds backing to out of the ESE along the coast and at all interior terminals except LEE. VCTS possible along the sea breeze, with greatest coverage focused across the interior after 20Z following the sea breeze collision. Have added TEMPOs at MCO, ISM, and SFB for MVFR conditions due to TSRA between 20-24Z. Activity is forecast to diminish after 02Z, with winds once again becoming light and variable at all terminals.
PRELIMINARY POINT TEMPS/POPS
DAB 90 75 91 75 / 60 40 60 10 MCO 94 76 93 77 / 60 40 60 20 MLB 90 76 91 76 / 40 20 50 20 VRB 90 73 91 73 / 40 20 50 20 LEE 91 76 92 76 / 60 50 50 10 SFB 93 76 93 77 / 60 50 60 20 ORL 93 76 93 77 / 60 40 60 20 FPR 90 73 91 74 / 40 20 50 20
MLB WATCHES/WARNINGS/ADVISORIES
FL...None.
AM...None.
Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
TRDF1 - 8721604 - Trident Pier, FL | 15 mi | 86 min | SW 8G | 81°F | 86°F | 30.12 | ||
41113 - Cape Canaveral Nearshore, FL (143) | 18 mi | 60 min | 79°F | 1 ft | ||||
41009 - CANAVERAL 20 NM East of Cape Canaveral, FL | 36 mi | 46 min | SSW 3.9G | 81°F | 81°F | 30.14 | 79°F | |
SIPF1 | 47 mi | 71 min | 6 | 81°F | 30.06 |
Wind History for Trident Pier, FL
toggle option: (graph/table)
Airport Reports
Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Air | DewPt | RH | inHg |
KTTS NASA SHUTTLE LANDING FACILITY,FL | 13 sm | 31 min | W 04 | 10 sm | Mostly Cloudy | 81°F | 77°F | 89% | 30.09 | |
KXMR CAPE CANAVERAL AFS SKID STRIP,FL | 15 sm | 31 min | SSW 03 | 10 sm | A Few Clouds | 81°F | 77°F | 89% | 30.08 | |
KCOF PATRICK AFB,FL | 21 sm | 31 min | WSW 05 | 10 sm | Clear | 82°F | 77°F | 84% | 30.09 | |
KMCO ORLANDO INTL,FL | 24 sm | 33 min | WSW 04 | 10 sm | Mostly Cloudy | 81°F | 73°F | 79% | 30.13 |
Link to 1 hour of 5 minute data for KTIX
Terminal Aerodrome Forecast (TAF) for KTIX
Wind History Graph: TIX
(wind in knots)GEOS Local Image of southeast
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Melbourne, FL,

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