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seatemperatures.net

Where is warm enough to swim in September?

Of 19,259 coastal locations on this site, 12,498 sit above 20°C in a typical September. That's 65% of the world's tracked coastline. The list below shows where they are, with the warmest regions surfaced first.

Comfortable swim (≥ 20°C)

12,498

65% of coastal locations worldwide

Very warm (≥ 25°C)

8,392

44% of coastal locations worldwide

Warmest spot in September

Jazirat Arzanah

34.3°C in United Arab Emirates

Browse September by region

Each region is ranked by how many of its coastal locations clear the 20°C comfort threshold in September. Use this to narrow down a part of the world before picking a country.

# Region Locations ≥ 20°C
1 Asia 3,229
2 North America 3,068
3 Europe 2,916
4 Australia and Oceania 966
5 Caribbean and Central America 710
6 Africa 647
7 Middle East 551
8 South America 411

Live world sea temperature map

Pins coloured by today's reading at every location we track. Use the map for current conditions, the list below for typical September.

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

Warmest asia beaches in September

3,229 locations ≥ 20°C

Top eight asia locations by typical September sea temperature. Use the linked full Asia ranking in September for the complete list.

# Location September mean
1 Labuk Bay Sabah 30.4°C
2 Shortt Island Odisha 30.3°C
3 Digha 30.3°C
4 Mandarmani 30.3°C
5 Hon Ne Thanh Hóa 30.3°C
6 Hon Me Khanh Hoa province 30.2°C
7 Hon Nieu Cua Lo 30.2°C
8 Diamond Harbour 30.2°C

Warmest north america beaches in September

3,068 locations ≥ 20°C

Top eight north america locations by typical September sea temperature. Use the linked full North America ranking in September for the complete list.

# Location September mean
1 San Felipe Baja California 30.8°C
2 Teacapan Sinaloa 30.8°C
3 Los Ayala Nayarit 30.7°C
4 Rincon de Guayabitos Nayarit 30.7°C
5 San Blas Nayarit 30.7°C
6 Lake Pleasant Arizona 30.6°C
7 Lake Powell Arizona 30.6°C
8 Phoenix Arizona 30.6°C

Warmest europe beaches in September

2,916 locations ≥ 20°C

Top eight europe locations by typical September sea temperature. Use the linked full Europe ranking in September for the complete list.

# Location September mean
1 Karpaz 28.5°C
2 Rizokarpaso 28.5°C
3 Dhavlos Northern Cyprus 28.4°C
4 Famagusta Northern Cyprus 28.4°C
5 lies Wallis (Mata-Utu) Hahake 28.4°C
6 Neta 28.4°C
7 Vokolida 28.4°C
8 Kyrenia Northern Cyprus 28.4°C

Warmest australia and oceania beaches in September

966 locations ≥ 20°C

Top eight australia and oceania locations by typical September sea temperature. Use the linked full Australia and Oceania ranking in September for the complete list.

# Location September mean
1 Nukuoro 30.1°C
2 Kuttu 30.1°C
3 Lukunor 30.1°C
4 Oneop 30.1°C
5 Satawan 30.1°C
6 Ta 30.1°C
7 Moro Tu Chuuk 30.1°C
8 Satawan Anchorage, Nomoi Islands, Chuuk, FSM Chuuk 30.1°C

Warmest caribbean and central america beaches in September

710 locations ≥ 20°C

Top eight caribbean and central america locations by typical September sea temperature. Use the linked full Caribbean and Central America ranking in September for the complete list.

# Location September mean
1 Campechuela 30.9°C
2 Manzanillo 30.9°C
3 Niquero 30.8°C
4 Delmas 73 Ouest Department 30.8°C
5 Santa Cruz del Sur 30.7°C
6 Léogâne Ouest Department 30.7°C
7 Jucaro 30.6°C
8 Carrefour 30.6°C

Warmest africa beaches in September

647 locations ≥ 20°C

Top eight africa locations by typical September sea temperature. Use the linked full Africa ranking in September for the complete list.

# Location September mean
1 Dahlac Archipelago 32.8°C
2 Bahir Dar 32.8°C
3 Lake Tana 32.8°C
4 Mits'iwa Northern Red Sea 32.8°C
5 Massawa 32.7°C
6 Edd 32.7°C
7 Harmil Island Northern Red Sea 32.7°C
8 Aseb Southern Red Sea 32.4°C

Warmest middle east beaches in September

551 locations ≥ 20°C

Top eight middle east locations by typical September sea temperature. Use the linked full Middle East ranking in September for the complete list.

# Location September mean
1 Jazirat Arzanah Abu Dhabi 34.3°C
2 Jazirat Dalma Abu Dhabi 34.2°C
3 Ghasha Light Buoy Abu Dhabi 34.2°C
4 Sir Bani Yas Abu Dhabi 34.2°C
5 Zirku Abu Dhabi 34.2°C
6 Jazirat Shuwayhat Abu Dhabi 34.2°C
7 Jabal az Zannah Abu Dhabi 34.2°C
8 Ar Ru'ays Abu Dhabi 34.1°C

Warmest south america beaches in September

411 locations ≥ 20°C

Top eight south america locations by typical September sea temperature. Use the linked full South America ranking in September for the complete list.

# Location September mean
1 Bahia el Tablazo Zulia 30.5°C
2 El Toro Zulia 30.5°C
3 Punta de Palmas Zulia 30.5°C
4 Malecon Zulia 30.4°C
5 Covenas 30.3°C
6 Tolu 30.3°C
7 Cabimas 30.3°C
8 El Toro 30.3°C

Top 50 hottest coastal locations on Earth in September

Across every region, sorted by typical September mean. The very top of the list rarely shifts. Persian Gulf and Red Sea coasts hold the warmest position most months of the year.

# Location September mean
1 Jazirat Arzanah Abu Dhabi 34.3°C
2 Jazirat Dalma Abu Dhabi 34.2°C
3 Ghasha Light Buoy Abu Dhabi 34.2°C
4 Sir Bani Yas Abu Dhabi 34.2°C
5 Zirku Abu Dhabi 34.2°C
6 Jazirat Shuwayhat Abu Dhabi 34.2°C
7 Jabal az Zannah Abu Dhabi 34.2°C
8 Ar Ru'ays Abu Dhabi 34.1°C
9 Jazair al Yasat Abu Dhabi 34.1°C
10 El Bunduq Oilfield Abu Dhabi 34.1°C
11 Jazirat Shara'iwah Persian Gulf 34.1°C
12 Jazirat Das Abu Dhabi 34.1°C
13 Zirku Terminal Abu Dhabi 34.1°C
14 Zaqqum Oilfield (Platform Zws) Abu Dhabi 34.1°C
15 Umm al Hatab Abu Dhabi 34.0°C
16 Ras Abu Qumayyis Eastern Province 34.0°C
17 Fasht al Bazam Abu Dhabi 34.0°C
18 Halat Al Mubarraz Abu Dhabi 34.0°C
19 Mesaieed (Musay'id) Al Wakrah Municipality 34.0°C
20 Jazair Ghaghah Abu Dhabi 34.0°C
21 Khawr al Udayd Al Wakrah Municipality 33.9°C
22 Mesaieed Outer Channel Entrance Al Wakrah Municipality 33.9°C
23 Al Ahsa 33.9°C
24 Al Jazirah al Aliyah Al Daayen Municipality 33.9°C
25 Al Wakrah 33.9°C
Show 25 more ▸
26 Doha (Ad Dawhah) Doha 33.9°C
27 Al Khawr Al Khor 33.8°C
28 Az̧ Z̧a‘āyin Al Daayen 33.8°C
29 Khawr Shaqiq Al Khor 33.8°C
30 Sumaysimah Al Daayen 33.8°C
31 Abu al Abyad Abu Dhabi 33.8°C
32 Asaluyeh Bushehr Province 33.8°C
33 Al Khor 33.8°C
34 Doha 33.8°C
35 Sir Abu Nu'ayr Abu Dhabi 33.8°C
36 Umm ad Dalkh Abu Dhabi 33.8°C
37 Jazirat Halul Persian Gulf 33.7°C
38 Ras al Ghaf Abu Dhabi 33.7°C
39 Mina Zayid Approaches Abu Dhabi 33.7°C
40 Mina Zayid (New Free Port) Abu Dhabi 33.7°C
41 New Musaffah Channel (Outer) Abu Dhabi 33.7°C
42 Khalifa Port Abu Dhabi 33.6°C
43 Khawr Ghurabi Abu Dhabi 33.6°C
44 Jabal al Fuwayrit Madinat ash Shamal 33.6°C
45 Ras Laffan 33.6°C
46 Khawr Ghanadah Abu Dhabi 33.6°C
47 Ar Ru'ays Al Shamal Municipality 33.5°C
48 Ras ' Ushayriq Al Shamal Municipality 33.5°C
49 Abu Dhabi 33.5°C
50 Fasht al Dibal Persian Gulf 33.5°C

Browse other months

Same list, different month:

A note on the 20°C threshold

Twenty Celsius is the rough line where most casual swimmers say the water "isn't cold". Below that, you feel the shock on entry and stay aware of it. Above, you can usually relax. It's not a hard rule. Experienced cold-water swimmers happily swim well below it, and some people find anything under 24°C unpleasant. As a single number for a global comparison, 20 is the most useful one.

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