Marine Weather and Tide Forecast for Cudjoe Key, FL
May 19, 2024 7:41 PM EDT (23:41 UTC) Change Location
 | Sunrise 6:40 AM Sunset 8:07 PM Moonrise 3:50 PM Moonset 3:08 AM |
GMZ035 Expires:202405200300;;499786 Fzus52 Kkey 192033 Cwfkey
coastal waters forecast for the florida keys national weather service key west fl 433 pm edt Sun may 19 2024
florida bay, hawk channel and straits of florida from ocean reef to south of dry tortugas, and the extreme southeastern gulf of mexico, including the florida keys national marine sanctuary
seas are given as significant wave height, which is the average height of the highest 1/3 of the waves. Individual waves may be more than twice the significant wave height.
wave detail will include details about the period and direction of origin for the highest energy waves. Long-period swells coming from a different direction than the wind would be included in the wave detail.
gmz032-035-200300- bayside and gulf side from craig key to west end of seven mile bridge- gulf of mexico from west end of seven mile bridge to halfmoon shoal out to 5 fathoms- 433 pm edt Sun may 19 2024
Tonight - Northwest winds 10 to 15 knots, becoming south to southwest 5 to 10 knots. Seas 1 foot or less. NEarshore waters a light to moderate chop, becoming smooth to a light chop. Scattered showers and isolated Thunderstorms.
Monday - Southwest to west winds 5 to 10 knots, becoming west to northwest and increasing to near 10 knots. Seas 1 foot or less, building to around 1 foot. NEarshore waters smooth to a light chop, becoming a light chop. Scattered showers and isolated Thunderstorms.
Monday night - Northwest winds 10 to 15 knots, becoming northwest to north and decreasing to 5 to 10 knots after midnight. Seas 1 to 2 feet, subsiding to around 1 foot. NEarshore waters a light to moderate chop, becoming smooth to a light chop. Scattered showers and isolated Thunderstorms.
Tuesday - North to northeast winds near 5 knots, becoming west to northwest in the afternoon. Seas 1 foot or less. NEarshore waters smooth. Scattered showers and isolated Thunderstorms.
Tuesday night - West to northwest winds near 5 knots, becoming northeast to east and increasing to 5 to 10 knots after midnight. Seas 1 foot or less. NEarshore waters smooth, becoming smooth to a light chop. Isolated showers and Thunderstorms.
Wednesday - East winds 5 to 10 knots. Seas 1 foot or less. NEarshore waters smooth to a light chop. Isolated showers and Thunderstorms.
Wednesday night - East winds near 10 knots, increasing to 10 to 15 knots. Seas 1 foot or less, building to around 1 foot, except building to 1 to 2 feet west of the marquesas keys. NEarshore waters a light chop, becoming a light to moderate chop. Isolated showers and Thunderstorms.
Thursday - East winds near 10 knots. Seas around 1 foot. NEarshore waters a light chop. Isolated showers and Thunderstorms.
Thursday night - East winds 10 to 15 knots, becoming east to southeast and decreasing to near 10 knots. Seas around 1 foot, except 1 to 2 feet west of the marquesas keys. NEarshore waters a light to moderate chop, becoming a light chop. Isolated showers and Thunderstorms.
Friday - East to southeast winds 5 to 10 knots. Seas around 1 foot. NEarshore waters smooth to a light chop. Isolated showers and Thunderstorms.
Friday night - East to southeast winds near 10 knots. Seas around 1 foot. NEarshore waters a light chop. Isolated showers and Thunderstorms.
coastal waters forecast for the florida keys national weather service key west fl 433 pm edt Sun may 19 2024
florida bay, hawk channel and straits of florida from ocean reef to south of dry tortugas, and the extreme southeastern gulf of mexico, including the florida keys national marine sanctuary
seas are given as significant wave height, which is the average height of the highest 1/3 of the waves. Individual waves may be more than twice the significant wave height.
wave detail will include details about the period and direction of origin for the highest energy waves. Long-period swells coming from a different direction than the wind would be included in the wave detail.
gmz032-035-200300- bayside and gulf side from craig key to west end of seven mile bridge- gulf of mexico from west end of seven mile bridge to halfmoon shoal out to 5 fathoms- 433 pm edt Sun may 19 2024
GMZ005 Synopsis For Keys Coastal Waters From Ocean Reef To Dry Tortugas 433 Pm Edt Sun May 19 2024
Synopsis - The western extent of a low-level ridge axis that extends west-northwest has begun to loosen its grip across the florida keys, and breezes have shifted to the south to southwest. Breezes will quickly veer to the north while further decreasing this afternoon as a frontal boundary slides down the florida peninsula. There may be a break in the rain-free conditions tonight through Tuesday, followed by variable breezes turning to the east Wednesday through Thursday.
the approximate shoreward edge of the gulf stream as of may 15, 2024 - .
49 nm south of dry tortugas light - .on loggerhead key. 32 nm south of cosgrove shoal light - .off the marquesas keys. 24 nm south of sand key light - .off key west. 27 nm south of looe key - .off big pine key. 29 nm south of sombrero key light - .off marathon. 8 nm southeast of alligator reef light - .off islamorada. 3 nm southeast of molasses reef light - .off key largo.
gulf stream information courtesy of the national weather service in key west.
the approximate shoreward edge of the gulf stream as of may 15, 2024 - .
49 nm south of dry tortugas light - .on loggerhead key. 32 nm south of cosgrove shoal light - .off the marquesas keys. 24 nm south of sand key light - .off key west. 27 nm south of looe key - .off big pine key. 29 nm south of sombrero key light - .off marathon. 8 nm southeast of alligator reef light - .off islamorada. 3 nm southeast of molasses reef light - .off key largo.
gulf stream information courtesy of the national weather service in key west.
FXUS62 KKEY 191859 AFDKEY
Area Forecast Discussion National Weather Service Key West FL 259 PM EDT Sun May 19 2024
New DISCUSSION, MARINE, AVIATION
DISCUSSION
Issued at 300 PM EDT Sun May 19 2024 It has been another hot and steamy afternoon across much of the Florida Keys as Day 3 of the heat continues. KBYX radar has been quiet much of the day and GOES 16 Visible satellite imagery shows mostly fair weather cumulus clouds throughout the Keys. Some of these clouds earlier oriented themselves into a cloud line along the Island Chain. This cloud line started to the north and has since been slowly drifting southward to a place south of Island Chain. The Lower Keys is where this cloud line remains mostly over land still. Temperatures along the Island Chain are in the upper 80s to lower 90s with the Big Pine Key RAWS coming in with 94 degrees this afternoon. Dew points are in the upper 70s to near 80 degrees. As a result, the hot temperatures combined with the humidity is making the heat index which is what it feels like when you step outside to be in between 105 to 110 degrees.
Therefore, the Heat Advisory remains in effect until 6 PM EDT this evening for heat indices up to 110. The deep mean layer ridge continues to loosen its grip on the region as it moves to the southeast and further away from the area as a weak frontal boundary slides down the Florida Peninsula. As a result, marine platforms are observing southwest to west winds of 5 to 10 knots with the Upper Keys near 10 mph. The Lower and Middle Keys are observing west to northwest winds near 10 mph.
FORECAST
The mean layer ridge that has been dominating the weather across the Keys for the last few days will continue to move off to the southeast. Therefore, the heat we have been experiencing for the last few days is about to take a break. Upper level troughing over the Southeast coastline and just offshore will continue to slowly slide southward as it impinges on the aforementioned ridge. At the surface is a weak frontal boundary draped across central Florida and out into the central Gulf of Mexico. This front is currently responsible for the ongoing convection across east-central Florida, south of the Space Coast along with another area of convection over the southeastern Gulf to the northwest of the Florida Keys. This boundary will continue to slide southward tonight resulting in no change to the previous forecast. 40% PoPs were maintained for the overnight period with the only change being to add scattered thunder to the eastern Straits of Florida.
Hi-res model guidance has also been very consistent on showers and thunderstorms developing in the vicinity of the Keys around 20/06z overnight with the bulk of this activity remaining south of the Island Chain.
The aforementioned upper level trough and corresponding weak area of low pressure over the Northwestern Bahamas is expected to keep the Keys unsettled for early to mid week. Therefore, no change was made to the forecast either for Monday through the Tuesday night time frame. Kept the PoPs the same as the previous package with 30% Monday, 40% Monday night, 30% Tuesday and 20% Tuesday night. The most likely driver for convection after tonight will be residual outflow boundaries from previous convection along with some daytime destabilization to help ignite new rounds of showers and thunderstorms.
Wednesday through the upcoming holiday weekend, upper level ridging will begin to move back into the region, though, not as strong as this previous ridge. Drier air moves back in resulting in slight chances (20%) being maintained through the period.
Temperatures look to remain in the upper 80s to near 90 degrees with dew points lower than they have been as of recent with mostly lower to mid 70s expected.
MARINE
Issued at 300 PM EDT Sun May 19 2024 There are currently no watches, warnings, or advisories in effect across the Florida Keys coastal waters. From synopsis, the western extent of a low-level ridge axis that extends west- northwest continues to loosen its grip across the Florida Keys, and breezes have shifted to the southwest to west. Breezes will quickly veer to the north while further decreasing tonight as a frontal boundary slides down the Florida peninsula. There may be a break in the rain-free conditions tonight through Tuesday, followed by variable breezes. Wednesday through the end of the week, breezes will peak and lull with northeast to east breezes in the afternoon and evening and then east to southeast during the overnight and morning hours.
AVIATION
(18Z TAFS)
Issued at 300 PM EDT Sun May 19 2024 VFR conditions will prevail at EYW and MTH the remainder of this afternoon through midnight. Near-surface winds are beginning to slacken to near 5 knots and may become variable during the TAF period. Cloud bases will lower overnight as scattered showers and isolated thunderstorms develop near and along the Florida Keys, per hi-res guidance. Uncertainty in the TAF centers around the exact timing of showers, if showers will be closer to EYW or MTH, where or when thunderstorms will develop near the island terminals, and if showers over the islands will be sufficient to generate IFR conditions.
CLIMATE
Yesterday, May 18th, the low temperature at both Key West and Marathon was 84F. This broke daily record warm low temperatures at both sites. At Marathon, this low temperature tied the highest warm low ever recorded in May in Marathon (current record that was tied: 84F, 2017), and broke the highest warm low ever recorded in May in Key West (previous record: 83F, 2024, 2020, 2017).
Temperature records date back to 1872 in Key West and 1950 in Marathon.
PRELIMINARY POINT TEMPS/POPS
Key West 80 88 79 89 / 40 30 40 30 Marathon 80 89 79 90 / 40 30 40 30
KEY WATCHES/WARNINGS/ADVISORIES
FL...Heat Advisory until 6 PM EDT this evening for FLZ076>078.
GM...None.
Area Forecast Discussion National Weather Service Key West FL 259 PM EDT Sun May 19 2024
New DISCUSSION, MARINE, AVIATION
DISCUSSION
Issued at 300 PM EDT Sun May 19 2024 It has been another hot and steamy afternoon across much of the Florida Keys as Day 3 of the heat continues. KBYX radar has been quiet much of the day and GOES 16 Visible satellite imagery shows mostly fair weather cumulus clouds throughout the Keys. Some of these clouds earlier oriented themselves into a cloud line along the Island Chain. This cloud line started to the north and has since been slowly drifting southward to a place south of Island Chain. The Lower Keys is where this cloud line remains mostly over land still. Temperatures along the Island Chain are in the upper 80s to lower 90s with the Big Pine Key RAWS coming in with 94 degrees this afternoon. Dew points are in the upper 70s to near 80 degrees. As a result, the hot temperatures combined with the humidity is making the heat index which is what it feels like when you step outside to be in between 105 to 110 degrees.
Therefore, the Heat Advisory remains in effect until 6 PM EDT this evening for heat indices up to 110. The deep mean layer ridge continues to loosen its grip on the region as it moves to the southeast and further away from the area as a weak frontal boundary slides down the Florida Peninsula. As a result, marine platforms are observing southwest to west winds of 5 to 10 knots with the Upper Keys near 10 mph. The Lower and Middle Keys are observing west to northwest winds near 10 mph.
FORECAST
The mean layer ridge that has been dominating the weather across the Keys for the last few days will continue to move off to the southeast. Therefore, the heat we have been experiencing for the last few days is about to take a break. Upper level troughing over the Southeast coastline and just offshore will continue to slowly slide southward as it impinges on the aforementioned ridge. At the surface is a weak frontal boundary draped across central Florida and out into the central Gulf of Mexico. This front is currently responsible for the ongoing convection across east-central Florida, south of the Space Coast along with another area of convection over the southeastern Gulf to the northwest of the Florida Keys. This boundary will continue to slide southward tonight resulting in no change to the previous forecast. 40% PoPs were maintained for the overnight period with the only change being to add scattered thunder to the eastern Straits of Florida.
Hi-res model guidance has also been very consistent on showers and thunderstorms developing in the vicinity of the Keys around 20/06z overnight with the bulk of this activity remaining south of the Island Chain.
The aforementioned upper level trough and corresponding weak area of low pressure over the Northwestern Bahamas is expected to keep the Keys unsettled for early to mid week. Therefore, no change was made to the forecast either for Monday through the Tuesday night time frame. Kept the PoPs the same as the previous package with 30% Monday, 40% Monday night, 30% Tuesday and 20% Tuesday night. The most likely driver for convection after tonight will be residual outflow boundaries from previous convection along with some daytime destabilization to help ignite new rounds of showers and thunderstorms.
Wednesday through the upcoming holiday weekend, upper level ridging will begin to move back into the region, though, not as strong as this previous ridge. Drier air moves back in resulting in slight chances (20%) being maintained through the period.
Temperatures look to remain in the upper 80s to near 90 degrees with dew points lower than they have been as of recent with mostly lower to mid 70s expected.
MARINE
Issued at 300 PM EDT Sun May 19 2024 There are currently no watches, warnings, or advisories in effect across the Florida Keys coastal waters. From synopsis, the western extent of a low-level ridge axis that extends west- northwest continues to loosen its grip across the Florida Keys, and breezes have shifted to the southwest to west. Breezes will quickly veer to the north while further decreasing tonight as a frontal boundary slides down the Florida peninsula. There may be a break in the rain-free conditions tonight through Tuesday, followed by variable breezes. Wednesday through the end of the week, breezes will peak and lull with northeast to east breezes in the afternoon and evening and then east to southeast during the overnight and morning hours.
AVIATION
(18Z TAFS)
Issued at 300 PM EDT Sun May 19 2024 VFR conditions will prevail at EYW and MTH the remainder of this afternoon through midnight. Near-surface winds are beginning to slacken to near 5 knots and may become variable during the TAF period. Cloud bases will lower overnight as scattered showers and isolated thunderstorms develop near and along the Florida Keys, per hi-res guidance. Uncertainty in the TAF centers around the exact timing of showers, if showers will be closer to EYW or MTH, where or when thunderstorms will develop near the island terminals, and if showers over the islands will be sufficient to generate IFR conditions.
CLIMATE
Yesterday, May 18th, the low temperature at both Key West and Marathon was 84F. This broke daily record warm low temperatures at both sites. At Marathon, this low temperature tied the highest warm low ever recorded in May in Marathon (current record that was tied: 84F, 2017), and broke the highest warm low ever recorded in May in Key West (previous record: 83F, 2024, 2020, 2017).
Temperature records date back to 1872 in Key West and 1950 in Marathon.
PRELIMINARY POINT TEMPS/POPS
Key West 80 88 79 89 / 40 30 40 30 Marathon 80 89 79 90 / 40 30 40 30
KEY WATCHES/WARNINGS/ADVISORIES
FL...Heat Advisory until 6 PM EDT this evening for FLZ076>078.
GM...None.
| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | inHg | DewPt |
| KYWF1 - 8724580 - Key West, FL | 18 mi | 53 min | NNW 12G | 89°F | 29.91 | |||
| SMKF1 - Sombrero Key, FL | 20 mi | 41 min | 29.87 | |||||
| VCAF1 - 8723970 - Vaca Key, FL | 20 mi | 53 min | WNW 14G | 91°F | ||||
| SANF1 - Sand Key, FL | 25 mi | 41 min | NNW 13G | 85°F | 29.89 | 76°F | ||
| 42095 | 30 mi | 41 min | 85°F | 85°F | 2 ft | |||
| LONF1 - Long Key, FL | 36 mi | 41 min | WNW 15G | 86°F | 29.85 | 78°F | ||
| JKYF1 - Johnson Key, FL | 42 mi | 161 min | 92°F | 33 ft | ||||
| LRKF1 - Little Rabbit Key, FL | 42 mi | 161 min | 92°F | 32 ft | ||||
| MUKF1 - Murray Key, FL | 43 mi | 161 min | 92°F | |||||
| PKYF1 - Peterson Key, FL | 43 mi | 161 min | 91°F | 32 ft | ||||
| BKYF1 | 48 mi | 161 min | 95°F | 33 ft | ||||
| WRBF1 - Whipray Basin, FL | 49 mi | 161 min | 14 | 94°F | 32 ft |
toggle option: (graph/table)
| Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Temp | DewPt | RH | inHg |
| KNQX KEY WEST NAS /BOCA CHICA FIELD/,FL | 12 sm | 48 min | NNW 11 | 10 sm | Mostly Cloudy | 90°F | 79°F | 71% | 29.89 | |
| KEYW KEY WEST INTL,FL | 16 sm | 48 min | NNW 09 | 9 sm | Clear | 88°F | 81°F | 79% | 29.89 | |
| KMTH THE FLORIDA KEYS MARATHON INTL,FL | 24 sm | 48 min | WNW 12G18 | 10 sm | Clear | 88°F | 77°F | 70% | 29.89 |
Gopher Key
Click for Map
Sun -- 01:42 AM EDT 0.29 feet Low Tide
Sun -- 04:08 AM EDT Moonset
Sun -- 06:40 AM EDT Sunrise
Sun -- 07:06 AM EDT 1.36 feet High Tide
Sun -- 02:39 PM EDT 0.08 feet Low Tide
Sun -- 04:49 PM EDT Moonrise
Sun -- 08:04 PM EDT 1.07 feet High Tide
Sun -- 08:04 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sun -- 01:42 AM EDT 0.29 feet Low Tide
Sun -- 04:08 AM EDT Moonset
Sun -- 06:40 AM EDT Sunrise
Sun -- 07:06 AM EDT 1.36 feet High Tide
Sun -- 02:39 PM EDT 0.08 feet Low Tide
Sun -- 04:49 PM EDT Moonrise
Sun -- 08:04 PM EDT 1.07 feet High Tide
Sun -- 08:04 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Gopher Key, Cudjoe Bay, Florida, Tide feet
| 12 am |
| 0.4 |
| 1 am |
| 0.3 |
| 2 am |
| 0.3 |
| 3 am |
| 0.4 |
| 4 am |
| 0.7 |
| 5 am |
| 1 |
| 6 am |
| 1.3 |
| 7 am |
| 1.4 |
| 8 am |
| 1.3 |
| 9 am |
| 1.2 |
| 10 am |
| 1 |
| 11 am |
| 0.7 |
| 12 pm |
| 0.4 |
| 1 pm |
| 0.2 |
| 2 pm |
| 0.1 |
| 3 pm |
| 0.1 |
| 4 pm |
| 0.2 |
| 5 pm |
| 0.5 |
| 6 pm |
| 0.8 |
| 7 pm |
| 1 |
| 8 pm |
| 1.1 |
| 9 pm |
| 1 |
| 10 pm |
| 0.9 |
| 11 pm |
| 0.7 |
Bahía Honda Harbor (Bridge) Florida Current
Click for Map
Sun -- 12:28 AM EDT -1.85 knots Max Ebb
Sun -- 03:48 AM EDT 0.00 knots Slack
Sun -- 04:07 AM EDT Moonset
Sun -- 06:23 AM EDT 0.90 knots Max Flood
Sun -- 06:39 AM EDT Sunrise
Sun -- 08:55 AM EDT -0.00 knots Slack
Sun -- 12:33 PM EDT -2.04 knots Max Ebb
Sun -- 03:51 PM EDT 0.00 knots Slack
Sun -- 04:48 PM EDT Moonrise
Sun -- 06:49 PM EDT 1.39 knots Max Flood
Sun -- 08:04 PM EDT Sunset
Sun -- 09:47 PM EDT -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sun -- 12:28 AM EDT -1.85 knots Max Ebb
Sun -- 03:48 AM EDT 0.00 knots Slack
Sun -- 04:07 AM EDT Moonset
Sun -- 06:23 AM EDT 0.90 knots Max Flood
Sun -- 06:39 AM EDT Sunrise
Sun -- 08:55 AM EDT -0.00 knots Slack
Sun -- 12:33 PM EDT -2.04 knots Max Ebb
Sun -- 03:51 PM EDT 0.00 knots Slack
Sun -- 04:48 PM EDT Moonrise
Sun -- 06:49 PM EDT 1.39 knots Max Flood
Sun -- 08:04 PM EDT Sunset
Sun -- 09:47 PM EDT -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Bahia Honda Harbor (Bridge) Florida Current, knots
| 12 am |
| -1.8 |
| 1 am |
| -1.8 |
| 2 am |
| -1.4 |
| 3 am |
| -0.6 |
| 4 am |
| 0.1 |
| 5 am |
| 0.7 |
| 6 am |
| 0.9 |
| 7 am |
| 0.9 |
| 8 am |
| 0.6 |
| 9 am |
| -0.1 |
| 10 am |
| -0.9 |
| 11 am |
| -1.6 |
| 12 pm |
| -2 |
| 1 pm |
| -2 |
| 2 pm |
| -1.6 |
| 3 pm |
| -0.8 |
| 4 pm |
| 0.1 |
| 5 pm |
| 0.9 |
| 6 pm |
| 1.3 |
| 7 pm |
| 1.4 |
| 8 pm |
| 1.2 |
| 9 pm |
| 0.7 |
| 10 pm |
| -0.2 |
| 11 pm |
| -1.1 |
Key West, FL,
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