Marine Weather and Tide Forecast for Laguna Heights, TX

DISCUSSION
Issued at 1232 PM CDT Sun May 17 2026

An unsettled weather pattern should set up over Deep South Texas and the Rio Grande Valley over through the majority of the forecast period. As the upper-level flow pattern of southwesterly flow will allow for daily convection to flare up over the Sierra Madre, there is a chance that these thunderstorms could move into the CWA each day. While the confidence is low at this time, thus PoPs have been generally limited to around 20%. However, by the end of the week, the environment does become more favorable for the development of showers and thunderstorms are a frontal boundary stalls to the north of the area and allows for moisture to pool in the region. Thus rain chances increase to medium (around 50-60%) for Thursday and Friday.

As for the temperatures, the highs for today through Tuesday are expected to be in the upper 90s to lower triple digits. The heat indices are expected to be around 108 for each of those days as well. Thus the heat risk for this time period is a mixture of moderate (level 2 of 4) to major (level 3 of 4). However by Wednesday, the temperatures do lower a bit as more clouds build into the region with the expected increase in rain chances.

Lastly, along the Lower Texas Coast, there is a moderate risk of rip currents today and tonight with a High Risk of Rip Currents starting tomorrow. There is a slight chance for some minor coastal flooding as well due to the increase in southeasterly swell.

AVIATION
(18Z TAFS)
Issued at 1232 PM CDT Sun May 17 2026

While the most of the afternoon should be mostly VFR, it is possible for periods of MVFR to occur with some lower ceilings.
BRO is most likely to MVFR ceilings than HRL and MFE. By this evening more MVFR ceilings are expected to dominate the area.
Southeasterly winds should remain gusty through most of the period due to enhanced pressure gradient over the region.

MARINE
Issued at 1232 PM CDT Sun May 17 2026

With the pressure gradient tightening over the Lower Texas waters, Small Craft Advisory is currently in place through 9 AM Monday, but could be extended even further as hazardous conditions could persist. The southeasterly winds are expected to be around 20 to 25 knots through much of the period.

PRELIMINARY POINT TEMPS/POPS
BROWNSVILLE 81 95 81 94 / 10 10 20 0 HARLINGEN 79 96 79 95 / 10 10 20 0 MCALLEN 80 98 80 97 / 20 10 20 0 RIO GRANDE CITY 79 99 79 98 / 20 10 30 10 SOUTH PADRE ISLAND 81 86 81 86 / 10 10 10 0 BAYVIEW/PORT ISABEL 80 93 80 92 / 10 10 10 0

BRO WATCHES/WARNINGS/ADVISORIES
TX...High Rip Current Risk from Monday morning through Monday evening for TXZ451-454-455.

GM...Small Craft Advisory until 9 AM CDT Monday for GMZ130-132-135- 150-155-170-175.