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Coldest beach in Louisiana in December

82 coastal locations in Louisiana ranked by their typical December sea temperature. State-wide average in December: 17.8°C.

Coldest in December

Mandeville

14.9°C

State December average

17.8°C

across 82 coastal locations in Louisiana

Vs annual mean

-5.9°C

below the year-round state average

What the Louisiana water feels like in December

At this temperature, water will feel cold compared to a swimming pool, but with a bit of experience and practice most people will find the water relatively comfortable to swim in.

Louisiana monthly average 15.6°C to 30.7°C
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  • Warmest month August 30.7°C
  • Coldest month January 15.6°C
  • Annual mean 23.7°C
  • Months above 20°C 8 of 12

Where December fits in the year

December sits inside the state pattern shown on the left. Browse a different month for a fresh ranking.

Louisiana sea temperature map (live)

Today's reading at every Louisiana beach we track. The list below uses the typical December mean from a decade of daily history.

Zoom in to see individual locations. Click a pin for water temperatures. View list →
°C -2 0 1 3 5 7 9 11 13 15 17 19 21 24 27 30 35

Top 50 coldest Louisiana beaches in December

Sorted by typical December mean. Click any beach for the full location page.

# Location December mean
1 Cocodrie, Terrebonne Bay Louisiana 18.8°C
2 East Isle Dernière, Lake Pelto Louisiana 18.8°C
3 Timbalier Island, Timbalier Bay, Louisiana Louisiana 18.8°C
4 Breton Islands, Louisiana Louisiana 18.1°C
5 Caillou Boca, Louisiana Louisiana 18.1°C
6 Raccoon Point, Caillou Bay, Louisiana Louisiana 18.1°C
7 Texas Gas Platform, Caillou Bay Louisiana 18.1°C
8 Freshwater Canal Locks Louisiana 17.9°C
9 Bulk Terminal Louisiana 17.6°C
10 Calcasieu Pass, East Jetty Louisiana 17.6°C
11 Calcasieu Pass, Lighthouse Wharf, Louisiana Louisiana 17.6°C
12 Lake Charles, Calcasieu River Louisiana 17.6°C
13 Mermentau River entrance, Louisiana Louisiana 17.6°C
14 Cameron Louisiana 17.5°C
15 Holly Beach Louisiana 17.5°C
16 Jack Bay, Louisiana Louisiana 17.2°C
17 Olga Compressor Station, Grand Bay Louisiana 17.2°C
18 Venice, Grand Pass Louisiana 17.2°C
19 Chandeleur Light, Louisiana Louisiana 17.1°C
20 South Point, Marsh Island, Atchafalaya Bay, Louisiana Louisiana 16.5°C
21 Eugene Island, Atchafalaya Bay Louisiana 16.3°C
22 Eugene Island, north of Louisiana 16.3°C
23 Lawma, Amerada Pass Louisiana 16.3°C
24 Point Au Fer, Atchafalaya Bay, Louisiana Louisiana 16.3°C
25 Shell Island, Atchafalaya Bay, Louisiana Louisiana 16.3°C
Show 25 more ▸
26 Stouts Pass At Six Mile Lake Louisiana 16.3°C
27 Tesoro Marine Term., Atchafalaya River Louisiana 16.3°C
28 Rabbit Island, 5 miles south of, Atchafalaya Bay, Louisiana Louisiana 16.2°C
29 Grand Pass Louisiana 16.2°C
30 Bay Gardene, Louisiana Louisiana 16.2°C
31 Lighthouse Point, Atchafalaya Bay, Louisiana Louisiana 15.8°C
32 Lighthouse Point Louisiana 15.8°C
33 Southwest Pass, Vermilion Bay, Louisiana Louisiana 15.8°C
34 Cypremort Point Louisiana 15.6°C
35 Weeks Bay, Vermilion Bay, Louisiana (sub) Louisiana 15.6°C
36 Weeks Bay Louisiana 15.6°C
37 Cote Blanche Island, West Cote Blanche Bay, Louisiana Louisiana 15.5°C
38 Point Chevreuil, Atchafalaya Bay, Louisiana Louisiana 15.5°C
39 Comfort Island, Louisiana Louisiana 15.5°C
40 The Rigolets, U.S. Highway 90 Louisiana 15.5°C
41 Shell Beach, Lake Borgne Louisiana 15.5°C
42 Lafitte, Barataria Waterway Louisiana 15.3°C
43 West Bank 1, Bayou Gauche Louisiana 15.3°C
44 Bayou BonFouca, Route 433, Louisiana Louisiana 15.0°C
45 Chef Menteur, Chef Menteur Pass, Louisiana Louisiana 15.0°C
46 Martello Castle, Lake Borgne Louisiana 15.0°C
47 University of New Orleans vicinity, Chef Menteur Pass Louisiana 15.0°C
48 Baton Rouge Louisiana 14.9°C
49 Mandeville Louisiana 14.9°C
50 New Orleans Louisiana 14.9°C

Warmest 10 in Louisiana in December

Same data flipped. The warmest spots in the state for this month.

# Location December mean
1 South Pass Louisiana 21.8°C
2 Pilot Station, Southwest Pass Louisiana 21.1°C
3 Pilots Station (east), Southwest Pass Louisiana 21.1°C
4 Southwest Pass, Mississippi River, Louisiana Louisiana 21.1°C
5 Grand Isle Louisiana 21.0°C
6 Devon Energy Facility Louisiana 20.0°C
7 Lonesome Bayou (Thomasin), Louisiana Louisiana 20.0°C
8 North Pass, Mississippi River, Louisiana Louisiana 20.0°C
9 Port Eads, South Pass, Mississippi River, Louisiana Louisiana 20.0°C
10 Port Eads Louisiana 20.0°C

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