Marine Weather and Tide Forecast for Port St. John, FL
 | Sunrise 6:29 AM Sunset 8:08 PM Moonrise 11:47 PM Moonset 9:17 AM |
AMZ552 Volusia-brevard County Line To Sebastian Inlet 0-20 Nm- 951 Am Edt Sat May 17 2025
Rest of today - West winds around 5 knots, becoming northwest late this morning, becoming southeast this afternoon. Seas 1 to 2 feet. Wave detail: east 2 feet at 8 seconds and southeast 1 foot at 3 seconds. A light chop on the intracoastal waters.
Tonight - South winds 5 to 10 knots, becoming west after midnight. Seas 2 feet. Wave detail: southeast 2 feet at 3 seconds and east 2 feet at 8 seconds. Mostly smooth on the intracoastal waters.
Sunday - Southwest winds around 5 knots, becoming southeast in the afternoon. Seas 1 to 2 feet. Wave detail: southeast 2 feet at 3 seconds and east 2 feet at 8 seconds. A light chop on the intracoastal waters.
Sunday night - South winds around 10 knots, becoming southwest after midnight. Seas 2 feet. Wave detail: southeast 2 feet at 3 seconds and east 2 feet at 8 seconds. Mostly smooth on the intracoastal waters.
Monday - Southwest winds around 5 knots, becoming southeast in the afternoon. Seas 1 to 2 feet. Wave detail: southeast 2 feet at 3 seconds and east 2 feet at 8 seconds. A light chop on the intracoastal waters.
Monday night - South winds 5 to 10 knots. Seas 2 feet. Wave detail: southeast 2 feet at 4 seconds and east 1 foot at 8 seconds. Mostly smooth on the intracoastal waters.
Tuesday - Southwest winds 5 to 10 knots, becoming southeast 10 to 15 knots in the afternoon. Seas 1 to 2 feet. A moderate chop on the intracoastal waters.
Tuesday night - South winds 10 to 15 knots, becoming southwest after midnight. Seas 2 to 3 feet. A light chop on the intracoastal waters.
Wednesday - Southwest winds 5 to 10 knots, becoming south 10 to 15 knots in the afternoon. Seas 1 to 2 feet. A moderate chop on the intracoastal waters.
Wednesday night - Southwest winds 10 to 15 knots. Seas 2 to 3 feet. A light chop on the intracoastal waters.
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 Sat -- 12:02 AM EDT Moonrise Sat -- 02:50 AM EDT 3.74 feet Low Tide Sat -- 06:31 AM EDT Sunrise Sat -- 08:53 AM EDT 3.75 feet High Tide Sat -- 10:16 AM EDT Moonset Sat -- 01:58 PM EDT 3.75 feet Low Tide Sat -- 08:08 PM EDT Sunset Sat -- 08:18 PM EDT 3.78 feet High Tide Tide / Current data from XTide NOT FOR NAVIGATION |
Titusville, Indian River, Florida, Tide feet
| 12 am |
| 3.8 |
| 1 am |
| 3.7 |
| 2 am |
| 3.7 |
| 3 am |
| 3.7 |
| 4 am |
| 3.7 |
| 5 am |
| 3.7 |
| 6 am |
| 3.7 |
| 7 am |
| 3.7 |
| 8 am |
| 3.8 |
| 9 am |
| 3.8 |
| 10 am |
| 3.7 |
| 11 am |
| 3.7 |
| 12 pm |
| 3.7 |
| 1 pm |
| 3.7 |
| 2 pm |
| 3.7 |
| 3 pm |
| 3.7 |
| 4 pm |
| 3.8 |
| 5 pm |
| 3.8 |
| 6 pm |
| 3.8 |
| 7 pm |
| 3.8 |
| 8 pm |
| 3.8 |
| 9 pm |
| 3.8 |
| 10 pm |
| 3.8 |
| 11 pm |
| 3.8 |
| Canaveral Harbor Entrance Click for Map Sat -- 12:01 AM EDT Moonrise Sat -- 05:54 AM EDT 0.68 feet Low Tide Sat -- 06:30 AM EDT Sunrise Sat -- 10:16 AM EDT Moonset Sat -- 11:38 AM EDT 2.76 feet High Tide Sat -- 05:25 PM EDT 0.50 feet Low Tide Sat -- 08:07 PM EDT Sunset Tide / Current data from XTide NOT FOR NAVIGATION |
Canaveral Harbor Entrance, Florida, Tide feet
| 12 am |
| 4 |
| 1 am |
| 3.5 |
| 2 am |
| 2.8 |
| 3 am |
| 2 |
| 4 am |
| 1.3 |
| 5 am |
| 0.8 |
| 6 am |
| 0.7 |
| 7 am |
| 0.9 |
| 8 am |
| 1.3 |
| 9 am |
| 1.8 |
| 10 am |
| 2.3 |
| 11 am |
| 2.7 |
| 12 pm |
| 2.7 |
| 1 pm |
| 2.4 |
| 2 pm |
| 1.9 |
| 3 pm |
| 1.3 |
| 4 pm |
| 0.8 |
| 5 pm |
| 0.5 |
| 6 pm |
| 0.6 |
| 7 pm |
| 0.9 |
| 8 pm |
| 1.6 |
| 9 pm |
| 2.4 |
| 10 pm |
| 3.1 |
| 11 pm |
| 3.7 |
FXUS62 KMLB 171334 AFDMLB
Area Forecast Discussion National Weather Service Melbourne FL 934 AM EDT Sat May 17 2025
New UPDATE
KEY MESSAGES
Issued at 934 AM EDT Sat May 17 2025
- Hot and dry weather persists this weekend and into mid next week with above normal to record high temperatures, as well as peak heat indices rising to 100-105. Drought conditions are forecast to worsen/expand and sensitive fire weather conditions are forecast
- There is a Moderate HeatRisk Today to Sunday and a Moderate to Major HeatRisk on Monday to Wednesday
- A weak front will bring slim rain chances late next week but a change in wind direction will bring somewhat lower (more seasonable) temperatures
UPDATE
Issued at 934 AM EDT Sat May 17 2025
Local radar imagery shows dry conditions and GOES-16 satellite imagery shows scattered to broken cirrus clouds over east central.
High pressure (~1016mb) is situated over the eastern Gulf of America and Florida. Temperatures are currently in the mid 70s to low 80s with dew points in the mid 60s to mid 70s. Winds are from the west-southwest at 5-10mph. Dry and hot conditions are expected today with high pressure over Florida. ECMWF and NAEFS ensembles indicate temperatures in the 97.5th to maximum percentile for this time of year this afternoon over east central Florida. Above normal (~5-10F+) to record high temperatures in the low to mid 90s with mostly sunny skies are expected. Heat index values between 98-103F are forecast. There is a Moderate HeatRisk for most of east central Florida today. This level of heat affects most individuals sensitive to heat, especially those without adequate hydration or effective cooling. It is recommended that those who spend extended periods of time outside this afternoon and early evening to drink plenty of water, wear light- colored clothing, reduce time spent outdoors or stay in the shade, and take breaks in an air conditioned facility.
PREVIOUS DISCUSSION
Issued at 415 AM EDT Sat May 17 2025
Today-Sun...A mid-level ridge (~592dm) centered over the Gulf will nose E across the FL peninsula and result in continued subsidence across the area. In the low levels, Atlantic high pressure ridge axis will remain across south central FL, promoting a light offshore wind flow to start the day, turning onshore behind the sea breeze each afternoon. Overall dry, but a slight uptick in moisture will produce dewpoints a skosh higher day by day allowing peak heat indices to reach between 100-105. This means there should be a little more fair weather cumulus development than previous days but rain chances remain too low to mention (less than 15 percent). There will continue to be cirrus/cirrostratus streaming SE. These high clouds will be pretty thin so they should not affect max temps much but could filter the sun at times.
Widespread max temps in the mid 90s across interior sections as well as inland portions of the coastal counties. Coastal Volusia will again reach the mid 90s since the sea breeze will be significantly delayed and should not penetrate much inland. This will put Daytona Beach in a good position to equal (or even exceed) its record high of 95F today. We'll also be watching Sanford approach its record highs both today and Sunday (96F and 95F, respectively). Orlando has a longer period of record so it's typically more difficult to set records there but a couple of longstanding records (both 97F from 1915 and 1930) will be at risk for a tie.
Mon-Wed...The deep layer ridging will persist producing hot temperatures and rain chances no higher than 10 percent.
Widespread mid 90s will continue over the interior with a few upper 90s possible with potential for more record highs to be equaled or even exceeded. Coastal sections will hold in the lower 90s but there is a better chance for a more delayed sea breeze along the Volusia coast where the offshore flow is a bit stronger so Daytona Beach will again approach their record highs on Mon and Tue (See below). Peak heat indices are forecast to reach 100 to 105 each day just inland from the coast.
Thu-Fri...A weak cool front is forecast to cross the area Thu but moisture looks meager so rain chances are only 20-30% and where it does rain amounts should be paltry. High pressure behind the front will produce a wind shift out of the NE-E. This switch to an onshore flow will bring down max temps to more seasonable levels, mid-upper 80s coast and around 90 inland Fri.
MARINE
Issued at 415 AM EDT Sat May 17 2025
High pressure ridge axis is forecast to remain nearly stationary across south central Florida, roughly across Lake Okeechobee and northernmost Bahamas, through the weekend and into early next week. This pattern will produce largely favorable boating conditions with a light offshore (W-SW) flow each morning shifting E-SE increasing 10-14 knots near the coast behind the sea breeze each afternoon. Seas 1-2 FT through the period except building to 3 FT offshore Tue night/Wed. Chance for rain continues to be very low during this period.
AVIATION
(12Z TAFs)
Issued at 624 AM EDT Sat May 17 2025
VFR and dry conditions through the TAF period. Light and variable winds early this morning will become S/SW and increase to 10-14 KT by mid morning. The east coast sea breeze is forecast to form this afternoon from TIX southward, backing the winds onshore. Winds will then become light and variable once again this evening (00-01Z) before winds become S/SW at 5-8 KT by mid morning Sunday.
FIRE WEATHER
Issued at 415 AM EDT Sat May 17 2025
Unseasonably hot and dry conditions are forecast to persist this weekend and early next week. With very low rain chances and relatively low RH values, soil moisture will continue to decrease.
Min RH values are forecast to fall between 30-35 percent today and Sunday over the north interior. The west winds are forecast to remain below 15 mph so conditions will not meet Red Flag. The offshore winds will turn onshore near the coast in a sea breeze each afternoon and hold min RH values along the coast south of the Cape near 50 percent. Dispersion values will be Very Good across Lake, Volusia, Seminole, Orange and Osceola counties both days with Fair to Good dispersion across southern and immediate coastal sections.
CLIMATE
Issued at 934 AM EDT Sat May 17 2025
Record highs today through Wednesday:
DAB 17-May 95 1963 LEE 17-May 96 1991 SFB 17-May 96 2001 MCO 17-May 97 1915 MLB 17-May 97 1963 VRB 17-May 95 2023 FPR 17-May 95 2008
DAB 18-May 97 1995 LEE 18-May 98 1996 SFB 18-May 95 2024 MCO 18-May 97 1930 MLB 18-May 96 1995 VRB 18-May 96 2024 FPR 18-May 98 1995
DAB 19-May 94 1995 LEE 19-May 94 1991 SFB 19-May 97 1960 MCO 19-May 98 1908 MLB 19-May 95 1995 VRB 19-May 95 1995 FPR 19-May 97 1995
DAB 20-May 94 2008 LEE 20-May 95 2017 SFB 20-May 95 2017 MCO 20-May 96 1935 MLB 20-May 95 1980 VRB 20-May 93 2020 FPR 20-May 96 1980
DAB 21-May 97 1998 LEE 21-May 97 1962 SFB 21-May 100 1962 MCO 21-May 98 1908 MLB 21-May 96 1998 VRB 21-May 95 2015 FPR 21-May 97 2008
PRELIMINARY POINT TEMPS/POPS
DAB 96 69 94 69 / 0 0 0 0 MCO 96 73 96 73 / 0 0 10 0 MLB 92 73 90 73 / 0 0 10 0 VRB 93 72 92 72 / 0 0 10 0 LEE 94 72 95 72 / 0 0 0 0 SFB 97 71 97 71 / 0 0 10 0 ORL 96 73 96 73 / 0 0 10 0 FPR 92 71 92 72 / 0 0 10 0
MLB WATCHES/WARNINGS/ADVISORIES
FL...None.
AM...None.
Area Forecast Discussion National Weather Service Melbourne FL 934 AM EDT Sat May 17 2025
New UPDATE
KEY MESSAGES
Issued at 934 AM EDT Sat May 17 2025
- Hot and dry weather persists this weekend and into mid next week with above normal to record high temperatures, as well as peak heat indices rising to 100-105. Drought conditions are forecast to worsen/expand and sensitive fire weather conditions are forecast
- There is a Moderate HeatRisk Today to Sunday and a Moderate to Major HeatRisk on Monday to Wednesday
- A weak front will bring slim rain chances late next week but a change in wind direction will bring somewhat lower (more seasonable) temperatures
UPDATE
Issued at 934 AM EDT Sat May 17 2025
Local radar imagery shows dry conditions and GOES-16 satellite imagery shows scattered to broken cirrus clouds over east central.
High pressure (~1016mb) is situated over the eastern Gulf of America and Florida. Temperatures are currently in the mid 70s to low 80s with dew points in the mid 60s to mid 70s. Winds are from the west-southwest at 5-10mph. Dry and hot conditions are expected today with high pressure over Florida. ECMWF and NAEFS ensembles indicate temperatures in the 97.5th to maximum percentile for this time of year this afternoon over east central Florida. Above normal (~5-10F+) to record high temperatures in the low to mid 90s with mostly sunny skies are expected. Heat index values between 98-103F are forecast. There is a Moderate HeatRisk for most of east central Florida today. This level of heat affects most individuals sensitive to heat, especially those without adequate hydration or effective cooling. It is recommended that those who spend extended periods of time outside this afternoon and early evening to drink plenty of water, wear light- colored clothing, reduce time spent outdoors or stay in the shade, and take breaks in an air conditioned facility.
PREVIOUS DISCUSSION
Issued at 415 AM EDT Sat May 17 2025
Today-Sun...A mid-level ridge (~592dm) centered over the Gulf will nose E across the FL peninsula and result in continued subsidence across the area. In the low levels, Atlantic high pressure ridge axis will remain across south central FL, promoting a light offshore wind flow to start the day, turning onshore behind the sea breeze each afternoon. Overall dry, but a slight uptick in moisture will produce dewpoints a skosh higher day by day allowing peak heat indices to reach between 100-105. This means there should be a little more fair weather cumulus development than previous days but rain chances remain too low to mention (less than 15 percent). There will continue to be cirrus/cirrostratus streaming SE. These high clouds will be pretty thin so they should not affect max temps much but could filter the sun at times.
Widespread max temps in the mid 90s across interior sections as well as inland portions of the coastal counties. Coastal Volusia will again reach the mid 90s since the sea breeze will be significantly delayed and should not penetrate much inland. This will put Daytona Beach in a good position to equal (or even exceed) its record high of 95F today. We'll also be watching Sanford approach its record highs both today and Sunday (96F and 95F, respectively). Orlando has a longer period of record so it's typically more difficult to set records there but a couple of longstanding records (both 97F from 1915 and 1930) will be at risk for a tie.
Mon-Wed...The deep layer ridging will persist producing hot temperatures and rain chances no higher than 10 percent.
Widespread mid 90s will continue over the interior with a few upper 90s possible with potential for more record highs to be equaled or even exceeded. Coastal sections will hold in the lower 90s but there is a better chance for a more delayed sea breeze along the Volusia coast where the offshore flow is a bit stronger so Daytona Beach will again approach their record highs on Mon and Tue (See below). Peak heat indices are forecast to reach 100 to 105 each day just inland from the coast.
Thu-Fri...A weak cool front is forecast to cross the area Thu but moisture looks meager so rain chances are only 20-30% and where it does rain amounts should be paltry. High pressure behind the front will produce a wind shift out of the NE-E. This switch to an onshore flow will bring down max temps to more seasonable levels, mid-upper 80s coast and around 90 inland Fri.
MARINE
Issued at 415 AM EDT Sat May 17 2025
High pressure ridge axis is forecast to remain nearly stationary across south central Florida, roughly across Lake Okeechobee and northernmost Bahamas, through the weekend and into early next week. This pattern will produce largely favorable boating conditions with a light offshore (W-SW) flow each morning shifting E-SE increasing 10-14 knots near the coast behind the sea breeze each afternoon. Seas 1-2 FT through the period except building to 3 FT offshore Tue night/Wed. Chance for rain continues to be very low during this period.
AVIATION
(12Z TAFs)
Issued at 624 AM EDT Sat May 17 2025
VFR and dry conditions through the TAF period. Light and variable winds early this morning will become S/SW and increase to 10-14 KT by mid morning. The east coast sea breeze is forecast to form this afternoon from TIX southward, backing the winds onshore. Winds will then become light and variable once again this evening (00-01Z) before winds become S/SW at 5-8 KT by mid morning Sunday.
FIRE WEATHER
Issued at 415 AM EDT Sat May 17 2025
Unseasonably hot and dry conditions are forecast to persist this weekend and early next week. With very low rain chances and relatively low RH values, soil moisture will continue to decrease.
Min RH values are forecast to fall between 30-35 percent today and Sunday over the north interior. The west winds are forecast to remain below 15 mph so conditions will not meet Red Flag. The offshore winds will turn onshore near the coast in a sea breeze each afternoon and hold min RH values along the coast south of the Cape near 50 percent. Dispersion values will be Very Good across Lake, Volusia, Seminole, Orange and Osceola counties both days with Fair to Good dispersion across southern and immediate coastal sections.
CLIMATE
Issued at 934 AM EDT Sat May 17 2025
Record highs today through Wednesday:
DAB 17-May 95 1963 LEE 17-May 96 1991 SFB 17-May 96 2001 MCO 17-May 97 1915 MLB 17-May 97 1963 VRB 17-May 95 2023 FPR 17-May 95 2008
DAB 18-May 97 1995 LEE 18-May 98 1996 SFB 18-May 95 2024 MCO 18-May 97 1930 MLB 18-May 96 1995 VRB 18-May 96 2024 FPR 18-May 98 1995
DAB 19-May 94 1995 LEE 19-May 94 1991 SFB 19-May 97 1960 MCO 19-May 98 1908 MLB 19-May 95 1995 VRB 19-May 95 1995 FPR 19-May 97 1995
DAB 20-May 94 2008 LEE 20-May 95 2017 SFB 20-May 95 2017 MCO 20-May 96 1935 MLB 20-May 95 1980 VRB 20-May 93 2020 FPR 20-May 96 1980
DAB 21-May 97 1998 LEE 21-May 97 1962 SFB 21-May 100 1962 MCO 21-May 98 1908 MLB 21-May 96 1998 VRB 21-May 95 2015 FPR 21-May 97 2008
PRELIMINARY POINT TEMPS/POPS
DAB 96 69 94 69 / 0 0 0 0 MCO 96 73 96 73 / 0 0 10 0 MLB 92 73 90 73 / 0 0 10 0 VRB 93 72 92 72 / 0 0 10 0 LEE 94 72 95 72 / 0 0 0 0 SFB 97 71 97 71 / 0 0 10 0 ORL 96 73 96 73 / 0 0 10 0 FPR 92 71 92 72 / 0 0 10 0
MLB WATCHES/WARNINGS/ADVISORIES
FL...None.
AM...None.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| TRDF1 - 8721604 - Trident Pier, FL | 15 mi | 47 min | NNW 5.1G | 85°F | 83°F | 30.05 | ||
| 41113 - Cape Canaveral Nearshore, FL (143) | 18 mi | 39 min | 78°F | 2 ft | ||||
| 41009 - CANAVERAL 20 NM East of Cape Canaveral, FL | 36 mi | 45 min | 77°F | 30.07 | ||||
| SIPF1 | 47 mi | 50 min | 4.1 | 80°F | 29.99 |
Wind History for Trident Pier, FL
toggle option: (graph/table)
| Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Air | DewPt | RH | inHg |
| KTIX SPACE COAST RGNL,FL | 4 sm | 18 min | calm | 7 sm | Clear | 91°F | 64°F | 41% | 30.06 | |
| KTTS NASA SHUTTLE LANDING FACILITY,FL | 13 sm | 10 min | W 07 | 10 sm | Overcast | 88°F | 68°F | 52% | 30.02 | |
| KXMR CAPE CANAVERAL AFS SKID STRIP,FL | 15 sm | 10 min | SSW 03 | 10 sm | Clear | 88°F | 64°F | 46% | 30.01 | |
| KCOF PATRICK AFB,FL | 21 sm | 10 min | E 03 | 10 sm | Clear | 84°F | 70°F | 62% | 30.02 | |
| KMCO ORLANDO INTL,FL | 24 sm | 12 min | WSW 10 | 10 sm | Mostly Cloudy | 88°F | 64°F | 46% | 30.05 |
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
Edit Hide
Melbourne, FL,
NOTICE: Some pages have affiliate links to Amazon. As an Amazon Associate, I earn from qualifying purchases. Please read website Cookie, Privacy, and Disclamers by clicking HERE. To contact me click HERE. For my YouTube page click HERE