Bay St. Louis Beach forecast: weather, water & waves

Sargassum season at Bay St. Louis Beach Hotels

Sargassum is rare at Bay St. Louis Beach Hotels: Veabird estimates moderate or heavier seaweed on the beach in fewer than one week in ten in every month.

Estimated share of weeks in each month with moderate or heavier seaweed on the beach. Veabird takes the landing season seen on Quintana Roo's beaches (a Puerto Morelos beach camera, 2015–2020, and the Mexican Navy's beach alerts, 2022–2026), the nearest coast with a multi-year beach record (this one has none), and scales it by how often NOAA AOML satellites see notable seaweed within about 20 km of this stretch of coast: 3% of weeks here on average, against 54% off Quintana Roo, so 5% of that season. The satellite share (2016–2024, the top fifth of all coast-weeks, adjusted for this beach's exposure of 12%) measures seaweed offshore, not on the sand: off the Riviera Maya it reads high even in winter, when little lands. Very low under 10%, Low 10–24%, Moderate 25–44%, High 45–69%, Very high 70%+. Beach faces 135°; onshore winds from that direction push seaweed ashore. Satellite sargassum data: USF Optical Oceanography Lab (Sargassum Watch System) via NOAA AOML. The satellite record as open data.

The Alabama & Mississippi coast month by month

Typical weather, water temperature, seaweed and crowds for every month: the best time to visit the Alabama & Mississippi coast.

• The Alabama & Mississippi coast in January
• The Alabama & Mississippi coast in February
• The Alabama & Mississippi coast in March
• The Alabama & Mississippi coast in April
• The Alabama & Mississippi coast in May
• The Alabama & Mississippi coast in June
• The Alabama & Mississippi coast in July
• The Alabama & Mississippi coast in August
• The Alabama & Mississippi coast in September
• The Alabama & Mississippi coast in October
• The Alabama & Mississippi coast in November
• The Alabama & Mississippi coast in December

Weather, water & seaweed by month at Bay St. Louis Beach Hotels

Average highs run from about 60°F in January to 90°F in August. The sea is warmest in July and August (about 90°F) and coolest in January (about 53°F). October is usually the driest, with about 7 rainy days; July is the wettest, with about 24 rainy days.

Monthly averages from 6 years of ERA5 reanalysis (Open-Meteo) for this area's 0.5° grid cell; rainy days have at least 1 mm (0.04 in). Sargassum is the typical-year estimate described above. Any given year can differ.

Cleanup & barriers

Offshore barriers

None offshore; Mississippi Sound barrier islands naturally shelter Biloxi.

Public cleanup

Gulf Shores/Orange Beach city crews and Harrison County sand beach dept. rake daily in summer.

Resort crews

Daily raking at resort frontage.

Typical clearing time

same-day

Safety notes

US domestic

• Frequent rip currents at Gulf Shores/Orange Beach.
• Mississippi Sound water quality advisories after heavy rain (MDEQ).

Check official advisories and local flags before swimming. Decomposing sargassum releases hydrogen sulfide; avoid heavy piles.

Things to do near Bay St. Louis, MS

• Gulf State Park & pier
• The Wharf (Orange Beach)
• Flora-Bama
• Biloxi casinos & Lighthouse
• Ship Island ferry

Fly in for the best beach days

Suggested dates are a week in December. Change them to match the live forecast above.

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Nearest airports

• Gulfport–Biloxi Intl (GPT), ~27 km
• New Orleans Louis Armstrong Intl (MSY), ~96 km

Nearby resorts

• The Inn at Long Beach Gulfport, MS · 17 km
• Island View Casino Resort Gulfport, MS · 22 km
• Courtyard by Marriott Gulfport Beachfront Gulfport, MS · 25 km
• Quality Inn Biloxi Beach Biloxi, MS · 35 km
• Days Inn by Wyndham Biloxi Beach Biloxi, MS · 38 km
• South Beach Biloxi, MS · 38 km