Skip to content
seatemperatures.net

Warmest sea in United States in June

4,477 coastal locations in United States ranked by their typical June sea temperature. Region-wide average in June: 19.6°C. The top of the list is where to find the warmest swimming this month.

Warmest in June

Lostmans River entrance, Florida

29.6°C June mean in United States

Regional June average

19.6°C

across all 4,477 coastal locations in United States

Vs annual mean

+3.4°C

above the year-round regional average

What the United States sea feels like in June

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.

United States monthly average 10.0°C to 22.6°C
J
F
M
A
M
J
J
A
S
O
N
D
  • Warmest month August 22.6°C
  • Coldest month February 10.0°C
  • Annual mean 16.2°C
  • Months above 20°C 3 of 12

Where June fits in the year

June sits inside the regional pattern shown on the left. Pick a different month to see how the ranking shifts.

All twelve United States month rankings:

United States sea temperature map (live)

The map shows today's latest reading at every United States location. The list below is based on the typical June mean, useful for trip planning weeks or months ahead.

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 warmest United States locations in June

Sorted by the typical June mean built from a decade of daily readings at each location. Click any place for its 30-day chart, monthly profile, and full 10-year history.

# Location June mean
1 Lostmans River entrance, Florida Florida 29.6°C
2 Onion Key Bay Florida 29.6°C
3 Onion Key, Lostmans River, Florida Florida 29.6°C
4 Shark River entrance, Florida Florida 29.6°C
5 Cape Sable, East Cape, Florida Florida 29.6°C
6 Chokoloskee Florida 29.6°C
7 Everglades City Florida 29.6°C
8 Duck Key Florida 29.6°C
9 Fiesta Key Florida 29.6°C
10 Layton Florida 29.6°C
11 Long Key Florida 29.6°C
12 Vaca Key Florida 29.6°C
13 Flamingo, Florida Bay, Florida Florida 29.5°C
14 Goodland Florida 29.5°C
15 Key Colony Beach Florida 29.5°C
16 Marathon Key Florida 29.5°C
17 Marco Island Florida 29.5°C
18 Annette Key, north end, Big Spanish Channel, Florida Florida 29.4°C
19 Big Spanish Key, Florida Florida 29.4°C
20 Chatham River entrance, Florida Florida 29.4°C
21 Content Keys, Content Passage, Florida Florida 29.4°C
22 Crawl Key, Big Spanish Channel, Florida Florida 29.4°C
23 East Bahia Honda Key, south end, Florida Bay, Florida Florida 29.4°C
24 Horseshoe Keys, south end, Florida Florida 29.4°C
25 Howe Key, northwest end, Florida Florida 29.4°C
Show 25 more ▸
26 Indian Key, Florida Florida 29.4°C
27 Johnson Keys, north end, Florida Florida 29.4°C
28 Little Pine Key, north end, Florida Florida 29.4°C
29 Little Spanish Key, Spanish Banks, Florida Florida 29.4°C
30 Pavilion Key Florida 29.4°C
31 West Bahia Honda Key, Florida Florida 29.4°C
32 Bahia Honda Florida 29.4°C
33 Big Pine Key Florida 29.4°C
34 Cudjoe Key Florida 29.4°C
35 Ramrod Key Florida 29.4°C
36 Cape Coral Florida 29.4°C
37 Cape Romano, Florida Florida 29.4°C
38 Coon Key Pass, Gullivan Bay Florida 29.4°C
39 Dismal Key, Pumpkin Bay Florida 29.4°C
40 Iona Florida 29.4°C
41 Marco, Big Marco River Florida 29.4°C
42 Marco Island, Caxambas Pass Florida 29.4°C
43 Mcgregor Florida 29.4°C
44 McIlvaine Bay Florida 29.4°C
45 Naples Florida 29.4°C
46 North Fort Myers Florida 29.4°C
47 Round Key, Florida Florida 29.4°C
48 Sebring Florida 29.4°C
49 Whiskey Creek Florida 29.4°C
50 Florida Keys Florida 29.4°C

Coldest 10 in United States in June

Same data the other way. Helpful if you want to know which United States coasts to avoid for swimming in June.

# Location June mean
1 Prudhoe Bay #2 Alaska -1.4°C
2 Barrow (offshore) Alaska -1.4°C
3 Point Barrow, Alaska Alaska -1.4°C
4 Point Barrow Alaska -1.4°C
5 Flaxman Island Alaska -1.4°C
6 Cross Island (Dinkum Sands) Alaska -1.3°C
7 Barter Island Alaska -1.2°C
8 Barrow Alaska -1.1°C
9 Prudhoe Bay Alaska -1.1°C
10 Red Dog Dock Alaska -0.9°C

More on this region