Marine Weather and Tide Forecast for Bayou Vista, LA

DISCUSSION
(Tonight through next Monday)
Issued at 1152 PM CDT Mon Jul 27 2026

Persistence forecast for the bulk of the short term period under the standing high pressure ridge aloft. Anticipating very similar conditions Tuesday and likely on Wednesday for this reason. Temps in the mid to upper 90s with dewpoints in the 70s resulting in heat indices in the 105 to 111F range. This warrants a heat advisory on Tuesday and Wednesday will likely need one as well.

Big signal coming down the pike for a pattern shift starting late Wednesday into Thursday. Upper troughiness spinning down out of the upper Midwest erodes upper high pressure, backing it into central Texas. This release of upper the upper ridge allows moisture to surge back in (PWATs from 1.50 increasing to 1.95 inches) by Thursday AM. This means a return of cloud cover and possibly some lower-end rain chances by afternoon. The moisture and clouds will help to break the heat somewhat, and highs in the mid 90s will be the expectation through the early weekend. Rain chances likely won't make a great return to central and southwest LA and southeast TX until Friday, depending on how long it takes the ridge to move out, but the cloud cover and break in the heat will be well-received, even still.

11/Calhoun

AVIATION
(12Z TAFS)
Issued at 625 AM CDT Tue Jul 28 2026

Once again not anticipating any aviation issues. Very little in the way of cloud cover with VFR conditions expected through the day. Winds will be light from the west to southwest.

07/Rua

MARINE
Issued at 1152 PM CDT Mon Jul 27 2026

Low seas and moderate onshore winds will prevail to the end of the work week as high pressure largely remains in charge. High pressure will begin backing into central Texas late Thursday into Friday, igniting a pressure gradient and increasing easterly winds. This may result in a period of Small Craft Advisory conditions and very likely will signal the return of some rain chances over coastal waters.

FIRE WEATHER
Issued at 1152 PM CDT Mon Jul 27 2026

The nearterm will see a prevailing forecast through the middle of the work week. High pressure situated overtop the area will keep conditions dry with little to no rain chances. The only exception being lower Acadiana where a few weak showers may move overhead in the afternoon. Expect the same on Wednesday under the same pattern.
Upper levels begin shifting into Thursday which should allow for some moisture and low end rain chances to return to the area.

LCH WATCHES/WARNINGS/ADVISORIES
LA...Heat Advisory from 10 AM this morning to 8 PM CDT this evening for LAZ027>033-044-045-055-073-074-141>143-152>154-241>243- 252>254.

TX...Heat Advisory from 10 AM this morning to 8 PM CDT this evening for TXZ180-201-259>262-515-516-615-616.

GM...None.