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Horn Island, MS - Mississippi Sound Marine Weather Forecast

Overnight - 80°F
Oct 02, 2026
10 to 15 mph SE
Chance Showers And Thunderstorms
A chance of rain showers before 1am, then a chance of showers and thunderstorms. Mostly clear. Low around 80, with temperatures rising to around 82 overnight. Southeast wind 10 to 15 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
Friday - 84°F
Oct 02, 2026
10 to 15 mph SE
Showers And Thunderstorms
Showers and thunderstorms before 5pm, then a chance of showers and thunderstorms. Partly sunny. High near 84, with temperatures falling to around 82 in the afternoon. Southeast wind 10 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Friday Night - 78°F
Oct 02, 2026
10 to 15 mph E
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
A chance of showers and thunderstorms before 10pm, then showers and thunderstorms likely. Mostly cloudy. Low around 78, with temperatures rising to around 80 overnight. East wind 10 to 15 mph. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible.
Saturday - 82°F
Oct 03, 2026
10 to 15 mph SE
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy, with a high near 82. Southeast wind 10 to 15 mph. Chance of precipitation is 90%.
Saturday Night - 78°F
Oct 03, 2026
5 to 10 mph SE
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy, with a low around 78. Southeast wind 5 to 10 mph. Chance of precipitation is 90%.
Sunday - 81°F
Oct 04, 2026
5 to 10 mph SE
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy, with a high near 81. Southeast wind 5 to 10 mph. Chance of precipitation is 90%.
Sunday Night - 75°F
Oct 04, 2026
5 to 10 mph NE
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy, with a low around 75. Northeast wind 5 to 10 mph. Chance of precipitation is 90%.
Monday - 80°F
Oct 05, 2026
10 to 15 mph NE
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy, with a high near 80. Northeast wind 10 to 15 mph.
Monday Night - 74°F
Oct 05, 2026
10 to 15 mph NE
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy, with a low around 74. Northeast wind 10 to 15 mph.
Tuesday - 79°F
Oct 06, 2026
15 to 20 mph NE
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy, with a high near 79. Northeast wind 15 to 20 mph.
Tuesday Night - 72°F
Oct 06, 2026
15 to 25 mph NE
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Northeast wind 15 to 25 mph.
Wednesday - 77°F
Oct 07, 2026
20 to 25 mph NE
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy, with a high near 77. Northeast wind 20 to 25 mph.
Wednesday Night - 70°F
Oct 07, 2026
20 to 25 mph NE
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Northeast wind 20 to 25 mph.
Thursday - 78°F
Oct 08, 2026
20 to 25 mph NE
Chance Rain Showers
A chance of rain showers. Partly sunny, with a high near 78. Northeast wind 20 to 25 mph.

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