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Coldest beach in Florida in September

819 coastal locations in Florida ranked by their typical September sea temperature. State-wide average in September: 29.4°C.

Coldest in September

Kings Ferry, St. Marys River, Florida

27.9°C

State September average

29.4°C

across 819 coastal locations in Florida

Vs annual mean

+4.1°C

above the year-round state average

What the Florida water feels like in September

This water temperature is comparable to that of a swimming pool, but it might be higher than most open water swimmers prefer for serious swimming. Make sure to drink plenty of water before and after swimming and don't wear a wetsuit to avoid overheating.

Florida monthly average 20.1°C to 30.1°C
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  • Warmest month August 30.1°C
  • Coldest month January 20.1°C
  • Annual mean 25.4°C
  • Months above 20°C 12 of 12

Where September fits in the year

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

Florida sea temperature map (live)

Today's reading at every Florida beach we track. The list below uses the typical September 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 Florida beaches in September

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

# Location September mean
1 I-295 Bridge (west end), St. Johns River Florida 28.1°C
2 Atlantic Beach, Florida Florida 28.1°C
3 Bar Pilot Dock, St. Johns River Florida 28.1°C
4 Black Creek, S.C.L. RR. bridge Florida 28.1°C
5 Blount Island Bridge, Florida Florida 28.1°C
6 Cedar Heights, Broward River Florida 28.1°C
7 Clapboard Creek, Pelotes Island Florida 28.1°C
8 Dame Point, St. Johns River Florida 28.1°C
9 Degaussing structure, Mayport Naval Station Florida 28.1°C
10 Fort George Island, Fort George River, Florida Florida 28.1°C
11 Fulton, Florida Florida 28.1°C
12 Jacksonville, Long Branch Florida 28.1°C
13 Jacksonville, Navy Fuel Depot, Florida Florida 28.1°C
14 Julington Creek, Florida Florida 28.1°C
15 Lake Forest, Ribault River, Trout River, Florida Florida 28.1°C
16 Little Pottsburg Creek, Florida Florida 28.1°C
17 Little Talbot Island, ocean, Florida Florida 28.1°C
18 Main Street Bridge, St. Johns River Florida 28.1°C
19 Mayport, St. Johns River Florida 28.1°C
20 Moncrief Creek entrance, Trout River, Florida Florida 28.1°C
21 Oak Landing, ICWW, Florida Florida 28.1°C
22 Orange Park Landing, Orange Park, Florida Florida 28.1°C
23 Ortega River entrance, Florida Florida 28.1°C
24 Pablo Creek entrance, Florida Florida 28.1°C
25 Pablo Creek, ICWW bridge, Florida Florida 28.1°C
Show 25 more ▸
26 Palm Valley, ICWW, Florida Florida 28.1°C
27 Peoria Point, Doctors Lake Florida 28.1°C
28 Phoenix Park Florida 28.1°C
29 Amelia City, South Amelia River, Florida Florida 28.0°C
30 Boggy Creek, 2 mi. above entrance, Nassau River, Florida Florida 28.0°C
31 Chester, Bells River Florida 28.0°C
32 Crandall, St. Marys River Florida 28.0°C
33 Cuno, Lofton Creek, Nassau River, Florida Florida 28.0°C
34 Cut 1N front range, St. Marys River Florida 28.0°C
35 Cut 2N front range, St. Marys River Florida 28.0°C
36 Edwards Creek, Nassau River Florida 28.0°C
37 Halfmoon Island, highway bridge, Nassau River, Florida Florida 28.0°C
38 Kingsley Creek, RR. bridge, Florida Florida 28.0°C
39 Little St. Marys River, St. Marys River, Florida Florida 28.0°C
40 Lofton, Lanceford Creek Florida 28.0°C
41 Mink Creek entrance, Nassau River, Florida Florida 28.0°C
42 Nassau River entrance, Florida Florida 28.0°C
43 Nassauville, Nassau River East Florida 28.0°C
44 Roses Bluff, Bells River, Florida Florida 28.0°C
45 Sawpit Creek, 1 mi. above entrance, Florida Florida 28.0°C
46 Sawpit Creek entrance, bridge, Florida Florida 28.0°C
47 St. Marys Entrance, North Jetty, Georgia Florida 28.0°C
48 Tiger Point, Pumpkin Hill Creek, Nassau River, Florida Florida 28.0°C
49 Vaughns Landing Florida 28.0°C
50 Kings Ferry, St. Marys River, Florida Florida 27.9°C

Warmest 10 in Florida in September

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

# Location September mean
1 Sawyer Key, inside, Cudjoe Channel, Florida Florida 30.3°C
2 Sawyer Key, outside, Cudjoe Channel, Florida Florida 30.3°C
3 Sawyer Key Florida 30.3°C
4 Fleming Key, north end Florida 30.3°C
5 Key West, south side, White Street Pier, Florida Florida 30.3°C
6 Sigsbee Park, Garrison Bight Channel, Florida Florida 30.3°C
7 Smith Shoal Light Florida 30.3°C
8 Annette Key, north end, Big Spanish Channel, Florida Florida 30.2°C
9 Big Spanish Key, Florida Florida 30.2°C
10 Content Keys, Content Passage, Florida Florida 30.2°C

Other US states

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