Louisiana Coast
Hopedale · Delacroix Water Temperature
Where the road ends at the Biloxi Marsh, in redfish water with a real reputation.
That is about 7°F warmer than average for this time of year, and cooling over the last two weeks. The October average here is 78°F.
Updated Saturday, October 3 — sea-surface temperature modeled for Hopedale · Delacroix by Open-Meteo.
Out in the open Gulf, NOAA buoy 42084 — 58 miles offshore — is reading 85°F. Deep water offshore runs cooler than the shallows in summer and warmer in winter, so it won't match the beach.
For swimming
Very warm
Bath-warm. Pleasant, though it stops being much relief from the heat of the day.
For fishing
Hot — fish the edges of the day
Early and late is the play. Through the middle of the day fish drop into deeper channels and passes where there's moving water and more oxygen.
The last two weeks
Daily average sea-surface temperature, °F.
Hopedale · Delacroix water temperature by month
Averaged from 3 years of daily sea-surface temperature (2023–2025). The range column is the coolest and warmest daily average recorded in that month over the period — a guide to how much any given year can differ, not a record high and low.
| Month | Average | Range | Swimming |
|---|---|---|---|
| January | 54°F | 48–61°F | Cold |
| February | 57°F | 49–67°F | Cold |
| March | 66°F | 59–75°F | Bracing |
| April | 73°F | 67–81°F | Cool but comfortable |
| May | 82°F | 74–88°F | Very warm |
| June | 88°F | 85–91°F | Bath water |
| July | 90°F | 88–93°F | Bath water |
| August | 91°F | 86–93°F | Bath water |
| September | 85°F | 80–89°F | Very warm |
| Octobernow | 78°F | 71–85°F | Warm |
| November | 70°F | 60–77°F | Cool but comfortable |
| December | 60°F | 53–67°F | Bracing |
Warmest on average in August at 91°F; coolest in January at 54°F.
The water at Hopedale · Delacroix
Hopedale and Delacroix are where the pavement quits and the marsh takes over, and the water beyond them — Lake Borgne, the bayous of the Biloxi Marsh, and the broken ponds and lagoons in between — is about as productive a redfish fishery as exists in this country. Reds crawl the shorelines and tail in shallow ponds, heavy trout hold the deeper cuts and shell bottom, and black drum and flounder fill in the rest of the calendar. The honest caveat is that this marsh is shrinking: Louisiana loses coastal land steadily, and the ponds out here are wider and shallower than they were a generation ago. Reading wind and water level matters more than any lure you tie on.
Lake Borgne & the Biloxi Marsh
What moves the water temperature here
The Gulf shelf off this coast is shallow, which is why the water swings so much more between summer and winter than open ocean at the same latitude does. Shallow water heats fast and gives that heat up fast: a single strong winter cold front can pull the inshore bays several degrees down in a couple of days, while the beaches a mile offshore barely move. Wind direction matters too — a sustained offshore breeze can pull cooler water up from below and drop the beach temperature noticeably in a morning.
Inshore bays, canals and flats run warmer than the beach through the summer and colder through the winter, for the same reason. The reading above is for the open water at Hopedale · Delacroix; expect the back bays to be a few degrees either side of it depending on the season.
Common questions
- What is the water temperature at Hopedale · Delacroix right now?
- The water at Hopedale · Delacroix is currently about 85°F (30°C). The October average here is 78°F.
- Is the water warm enough to swim at Hopedale · Delacroix in October?
- October averages 78°F at Hopedale · Delacroix, which most people would call warm. About as good as it gets — warm enough to stay in for hours without getting chilled.
- When is the water warmest at Hopedale · Delacroix?
- August is the warmest month on average at 91°F, and January the coolest at 54°F. 6 months of the year average 75°F or above.
- Why does the water temperature change so quickly here?
- The Gulf shelf off this coast is shallow, so it heats and cools far faster than deep open ocean. A strong winter cold front can pull the inshore water down several degrees in a couple of days, and a sustained offshore wind can drop beach temperatures in a single morning by pulling cooler water up from below.