Marine Weather and Tide Forecast for Port Mansfield, TX
April 30, 2025 10:50 AM CDT (15:50 UTC)
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![]() | Sunrise 6:52 AM Sunset 8:03 PM Moonrise 8:06 AM Moonset 10:47 PM |
GMZ132 Expires:202505010230;;717045 Fzus54 Kbro 301411 Cwfbro
coastal waters forecast for the lower texas coast national weather service brownsville tx 911 am cdt Wed apr 30 2025
lower texas coastal waters from baffin bay to the mouth of the rio grande out 60 nm.
seas are provided as a range of the average height of the highest 1/3 of the waves, along with the occasional height of the average highest 10 percent of the waves.
gmz130-132-135-010230- laguna madre from the port of brownsville to the arroyo colorado- laguna madre from the arroyo colorado to 5 nm north of port mansfield tx- laguna madre from 5 nm north of port mansfield to baffin bay tx- 911 am cdt Wed apr 30 2025
.small craft advisory in effect until 4 pm cdt this afternoon - .
Rest of today - Southeast winds 15 to 20 knots. Gusts to 30 knots this afternoon. Choppy on the bay. A slight chance of showers and Thunderstorms late this morning.
Tonight - Southeast winds 15 to 20 knots, becoming south 10 to 15 knots early in the morning. Choppy on the bay, diminishing to a moderate chop early in the morning.
Thursday - Southeast winds 10 to 15 knots. A moderate chop on the bay.
Thursday night - Southeast winds 10 to 15 knots. A moderate chop on the bay.
Friday - Southeast winds 10 to 15 knots. A moderate chop on the bay. A slight chance of showers and Thunderstorms in the afternoon.
Friday night - Southeast winds 10 to 15 knots. A moderate chop on the bay. A slight chance of showers in the evening. A slight chance of Thunderstorms in the late evening and overnight. A chance of showers after midnight.
Saturday - East winds 10 to 15 knots. A moderate chop on the bay. Showers with a chance of Thunderstorms.
Saturday night - East winds 10 to 15 knots. A moderate chop on the bay. A chance of Thunderstorms. Showers early in the evening, then a chance of showers in the late evening and overnight.
Sunday - East winds 10 to 15 knots. A moderate chop on the bay. A chance of showers. A chance of Thunderstorms until late afternoon, then a slight chance of Thunderstorms late in the afternoon.
Sunday night - East winds 10 to 15 knots, becoming southeast early in the morning. A moderate chop on the bay, diminishing to light chop early in the morning. A chance of showers with a slight chance of Thunderstorms early in the evening.
winds and waves higher in and near Thunderstorms.
coastal waters forecast for the lower texas coast national weather service brownsville tx 911 am cdt Wed apr 30 2025
lower texas coastal waters from baffin bay to the mouth of the rio grande out 60 nm.
seas are provided as a range of the average height of the highest 1/3 of the waves, along with the occasional height of the average highest 10 percent of the waves.
gmz130-132-135-010230- laguna madre from the port of brownsville to the arroyo colorado- laguna madre from the arroyo colorado to 5 nm north of port mansfield tx- laguna madre from 5 nm north of port mansfield to baffin bay tx- 911 am cdt Wed apr 30 2025
winds and waves higher in and near Thunderstorms.
GMZ100 911 Am Cdt Wed Apr 30 2025
Synopsis - Adverse marine conditions will occur at the start of the forecast due to an enhanced pressure gradient. Afterwards, a slow improvement in winds and seas is anticipated through the weekend as the gradient relaxes. Rain/thunderstorm chances return Friday through the weekend, which may result in reduced visibility and locally enhanced winds and seas.
7 Day Forecast for Marine Location Near Port Mansfield, TX

NEW! Add second zone forecast
Padre Island (South) Click for Map Wed -- 06:51 AM CDT Sunrise Wed -- 08:51 AM CDT 1.88 feet High Tide Wed -- 09:06 AM CDT Moonrise Wed -- 07:59 PM CDT Sunset Wed -- 11:39 PM CDT -1.00 feet Low Tide Wed -- 11:44 PM CDT Moonset Tide / Current data from XTide NOT FOR NAVIGATION |   |
Padre Island (South), Texas, Tide feet
12 am |
-0.9 |
1 am |
-0.6 |
2 am |
-0.2 |
3 am |
0.2 |
4 am |
0.7 |
5 am |
1.2 |
6 am |
1.5 |
7 am |
1.7 |
8 am |
1.9 |
9 am |
1.9 |
10 am |
1.8 |
11 am |
1.8 |
12 pm |
1.7 |
1 pm |
1.6 |
2 pm |
1.5 |
3 pm |
1.4 |
4 pm |
1.2 |
5 pm |
0.9 |
6 pm |
0.6 |
7 pm |
0.2 |
8 pm |
-0.1 |
9 pm |
-0.5 |
10 pm |
-0.8 |
11 pm |
-1 |
Padre Island (South) Click for Map Wed -- 06:51 AM CDT Sunrise Wed -- 08:44 AM CDT 1.83 feet High Tide Wed -- 09:06 AM CDT Moonrise Wed -- 07:59 PM CDT Sunset Wed -- 11:26 PM CDT -0.50 feet Low Tide Wed -- 11:44 PM CDT Moonset Tide / Current data from XTide NOT FOR NAVIGATION |   |
Padre Island (South), Texas (2), Tide feet
12 am |
-0.4 |
1 am |
-0.2 |
2 am |
0.1 |
3 am |
0.5 |
4 am |
0.9 |
5 am |
1.2 |
6 am |
1.5 |
7 am |
1.7 |
8 am |
1.8 |
9 am |
1.8 |
10 am |
1.8 |
11 am |
1.7 |
12 pm |
1.6 |
1 pm |
1.6 |
2 pm |
1.6 |
3 pm |
1.6 |
4 pm |
1.5 |
5 pm |
1.4 |
6 pm |
1.2 |
7 pm |
0.8 |
8 pm |
0.4 |
9 pm |
0 |
10 pm |
-0.3 |
11 pm |
-0.5 |
Area Discussion for Brownsville, TX
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FXUS64 KBRO 301121 AAA AFDBRO
Area Forecast Discussion...UPDATED National Weather Service Brownsville TX 621 AM CDT Wed Apr 30 2025
New AVIATION
SHORT TERM
(Today through Thursday)
Issued at 303 AM CDT Wed Apr 30 2025
This portion of the total forecast marks the end of the recent span of quiet weather and a turn towards a more active weather scenario. First, dry weather will continue today through tonight with waning 500 mb high pressure being suppressed towards the east and south. Then, with this mid- level feature out of the way and a west-southwest to east-northeast flow overhead in place, a shortwave will generate showers and thunderstorms over the higher terrain of neighboring Mexico. This convection may slip into the western third of the inland portion of the BRO CWFA Thursday afternoon.
Temperature-wise, above normal daytime highs and overnight lows will occur, aided by a moderate to breezy onshore flow. One aspect of the forecast to monitor for today will be the potential for a Wind Advisory over the eastern portion of Deep South Texas and the Rio Grande Valley, with model guidance reaching just shy of this established threshold.
Finally, with elevated seas in place along the Lower Texas Coast, a High Risk of rip currents will exist at the local beaches from today through Thursday.
LONG TERM
(Thursday night through Tuesday)
Issued at 303 AM CDT Wed Apr 30 2025
The passage of upper-level disturbances over Deep South Texas and the Rio Grande Valley are expected to persist through the duration of the long term forecast period. This will see a low chance (around 20-30%) of rain for Friday. However by Friday night, those chances of rain are expected to increase to a medium chance (around 70%)
late Friday night into Saturday morning. This will be the result of a frontal boundary moving into the region. This front is expected to stall out over the region, which will provide a hospitable region for the development of showers and thunderstorms.
Current DESI probabilities have around 60% chance of rainfall totals greater than 2 inches and around 40% chance of rainfall totals greater than 4 inches for this weekend. However, this far out focusing on specific parts for the CWA is not the best idea at this point as the models could shift still. Current storm total QPF at this point shows a range of 0.75 to 1.62 inches at this point. While the current storm total QPF is not lined up exactly with the DESI probabilities, looking at the PWAT values, both the GFS and the ECMWF models do show that the environment will be very moist. It is worth pointing out at this point the GFS has PWAT values around 1.9 inches while the ECMWF model has PWAT values around 1.75 inches. Both of these values are above the 90 percentile value for this time of year, which is normally around 1.71 inches for PWATs. However they are both still below the max of 2.02 inches. Still these PWAT values indicate a very moist environment. With the stalled out frontal boundary in place over the region, then there will be a source of forcing for the low-level moisture to turn into showers and thunderstorms. These showers and thunderstorms are also capable of producing heavy rainfall at times as well. Some localized street flooding and other nuisance flooding is possible with these storms.
The front is currently expected to start to lift out of the region sometime Sunday into Monday, which will result in rain chances decreasing greatly by Monday. With rain chances around 20% for the rest of the period.
As for the temperatures for the long term forecast period, the low temperatures are generally expected to be in the range of the upper 60s to low 70s for the region. The high temperatures for Friday are expected to be mostly in the 90s for the region except for along the coast where the highs are expected to be in the upper 80s. From Saturday through Tuesday, the high temperatures are generally expected to be in the 80s.
AVIATION
(12Z TAFS)
Issued at 618 AM CDT Wed Apr 30 2025
Breezy to windy conditions will prevail through a majority of the period with mostly cloudy skies and no precipitation. MVFR to VFR will prevail through the TAF period.
MARINE
Issued at 303 AM CDT Wed Apr 30 2025
Today through Thursday...Buoy 42020 reported south-southeast winds around 21 knots gusting to around 27 knots with seas slightly over 5.5 feet with a period of 6 seconds at 1:50 CDT/6:50 UTC. A Small Craft Advisory will be in effect for the Laguna Madre and Gulf of America waters from 0 to 60 nautical miles offshore today due to an enhanced pressure gradient. The Advisory may need to be extended through tonight, but a weakening of the gradient on Thursday should allow for more moderate winds and seas, with a Small Craft Should Exercise Caution not entirely ruled out.
Thursday Night through Tuesday...The start of the period will see mostly light to moderate onshore winds and low to moderate seas. By Sunday the winds are expected to shift more towards the east and increase to more adverse conditions requiring Small Craft Exercise Caution for the Gulf waters and remain that way for the rest of the period.
PRELIMINARY POINT TEMPS/POPS
BROWNSVILLE 88 76 88 75 / 0 0 10 10 HARLINGEN 91 73 91 72 / 0 0 10 10 MCALLEN 94 76 94 75 / 10 10 10 20 RIO GRANDE CITY 97 74 95 73 / 10 10 20 20 SOUTH PADRE ISLAND 82 75 81 75 / 0 0 0 10 BAYVIEW/PORT ISABEL 87 74 87 74 / 0 0 0 10
BRO WATCHES/WARNINGS/ADVISORIES
TX...High Rip Current Risk through Thursday evening for TXZ451-454- 455.
GM...Small Craft Advisory until 4 PM CDT this afternoon for GMZ130- 132-135.
Small Craft Advisory until 7 PM CDT this evening for GMZ150-155- 170-175.
Area Forecast Discussion...UPDATED National Weather Service Brownsville TX 621 AM CDT Wed Apr 30 2025
New AVIATION
SHORT TERM
(Today through Thursday)
Issued at 303 AM CDT Wed Apr 30 2025
This portion of the total forecast marks the end of the recent span of quiet weather and a turn towards a more active weather scenario. First, dry weather will continue today through tonight with waning 500 mb high pressure being suppressed towards the east and south. Then, with this mid- level feature out of the way and a west-southwest to east-northeast flow overhead in place, a shortwave will generate showers and thunderstorms over the higher terrain of neighboring Mexico. This convection may slip into the western third of the inland portion of the BRO CWFA Thursday afternoon.
Temperature-wise, above normal daytime highs and overnight lows will occur, aided by a moderate to breezy onshore flow. One aspect of the forecast to monitor for today will be the potential for a Wind Advisory over the eastern portion of Deep South Texas and the Rio Grande Valley, with model guidance reaching just shy of this established threshold.
Finally, with elevated seas in place along the Lower Texas Coast, a High Risk of rip currents will exist at the local beaches from today through Thursday.
LONG TERM
(Thursday night through Tuesday)
Issued at 303 AM CDT Wed Apr 30 2025
The passage of upper-level disturbances over Deep South Texas and the Rio Grande Valley are expected to persist through the duration of the long term forecast period. This will see a low chance (around 20-30%) of rain for Friday. However by Friday night, those chances of rain are expected to increase to a medium chance (around 70%)
late Friday night into Saturday morning. This will be the result of a frontal boundary moving into the region. This front is expected to stall out over the region, which will provide a hospitable region for the development of showers and thunderstorms.
Current DESI probabilities have around 60% chance of rainfall totals greater than 2 inches and around 40% chance of rainfall totals greater than 4 inches for this weekend. However, this far out focusing on specific parts for the CWA is not the best idea at this point as the models could shift still. Current storm total QPF at this point shows a range of 0.75 to 1.62 inches at this point. While the current storm total QPF is not lined up exactly with the DESI probabilities, looking at the PWAT values, both the GFS and the ECMWF models do show that the environment will be very moist. It is worth pointing out at this point the GFS has PWAT values around 1.9 inches while the ECMWF model has PWAT values around 1.75 inches. Both of these values are above the 90 percentile value for this time of year, which is normally around 1.71 inches for PWATs. However they are both still below the max of 2.02 inches. Still these PWAT values indicate a very moist environment. With the stalled out frontal boundary in place over the region, then there will be a source of forcing for the low-level moisture to turn into showers and thunderstorms. These showers and thunderstorms are also capable of producing heavy rainfall at times as well. Some localized street flooding and other nuisance flooding is possible with these storms.
The front is currently expected to start to lift out of the region sometime Sunday into Monday, which will result in rain chances decreasing greatly by Monday. With rain chances around 20% for the rest of the period.
As for the temperatures for the long term forecast period, the low temperatures are generally expected to be in the range of the upper 60s to low 70s for the region. The high temperatures for Friday are expected to be mostly in the 90s for the region except for along the coast where the highs are expected to be in the upper 80s. From Saturday through Tuesday, the high temperatures are generally expected to be in the 80s.
AVIATION
(12Z TAFS)
Issued at 618 AM CDT Wed Apr 30 2025
Breezy to windy conditions will prevail through a majority of the period with mostly cloudy skies and no precipitation. MVFR to VFR will prevail through the TAF period.
MARINE
Issued at 303 AM CDT Wed Apr 30 2025
Today through Thursday...Buoy 42020 reported south-southeast winds around 21 knots gusting to around 27 knots with seas slightly over 5.5 feet with a period of 6 seconds at 1:50 CDT/6:50 UTC. A Small Craft Advisory will be in effect for the Laguna Madre and Gulf of America waters from 0 to 60 nautical miles offshore today due to an enhanced pressure gradient. The Advisory may need to be extended through tonight, but a weakening of the gradient on Thursday should allow for more moderate winds and seas, with a Small Craft Should Exercise Caution not entirely ruled out.
Thursday Night through Tuesday...The start of the period will see mostly light to moderate onshore winds and low to moderate seas. By Sunday the winds are expected to shift more towards the east and increase to more adverse conditions requiring Small Craft Exercise Caution for the Gulf waters and remain that way for the rest of the period.
PRELIMINARY POINT TEMPS/POPS
BROWNSVILLE 88 76 88 75 / 0 0 10 10 HARLINGEN 91 73 91 72 / 0 0 10 10 MCALLEN 94 76 94 75 / 10 10 10 20 RIO GRANDE CITY 97 74 95 73 / 10 10 20 20 SOUTH PADRE ISLAND 82 75 81 75 / 0 0 0 10 BAYVIEW/PORT ISABEL 87 74 87 74 / 0 0 0 10
BRO WATCHES/WARNINGS/ADVISORIES
TX...High Rip Current Risk through Thursday evening for TXZ451-454- 455.
GM...Small Craft Advisory until 4 PM CDT this afternoon for GMZ130- 132-135.
Small Craft Advisory until 7 PM CDT this evening for GMZ150-155- 170-175.
Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
PMNT2 | 2 mi | 51 min | 79°F | 81°F | 29.85 | |||
RSJT2 - 8777812 - Rincon del San Jose; Potrero Lopeno SW, TX | 18 mi | 51 min | SSE 25G | 78°F | 78°F | 29.83 | ||
RLIT2 | 20 mi | 51 min | S 18G | 81°F | 77°F | 29.88 | ||
BZST2 | 35 mi | 51 min | SSE 17G | 79°F | 80°F | 29.84 | ||
PCGT2 - 8779748 - South Padre Island CGS, TX | 35 mi | 51 min | SSE 18G | 79°F | 79°F | 29.87 | ||
PTIT2 - 8779770 - Port Isabel, TX | 35 mi | 51 min | SSE 17G | 80°F | 81°F | 29.89 | ||
42020 - Corpus Christi, TX 50NM Southeast of Corpus Christi, TX | 48 mi | 31 min | SSE 21G | 78°F | 7 ft | 29.89 | 74°F |
Wind History for Rincon Del San Jose, TX
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Airport Reports
Link to 1 hour of 5 minute data for KHRL
Terminal Aerodrome Forecast (TAF) for KHRL
Wind History Graph: HRL
(wind in knots)GEOS Local Image of SouthCentralPlains
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Brownsville, TX,

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