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Warmest sea in North America in May

5,500 coastal locations in North America ranked by their typical May sea temperature. Region-wide average in May: 15.1°C. The top of the list is where to find the warmest swimming this month.

Warmest in May

Puerto Arista

30.5°C May mean in Mexico

Regional May average

15.1°C

across all 5,500 coastal locations in North America

Vs annual mean

-0.1°C

below the year-round regional average

What the North America sea feels like in May

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.

North America monthly average 9.3°C to 21.6°C
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  • Warmest month August 21.6°C
  • Coldest month February 9.3°C
  • Annual mean 15.2°C
  • Months above 20°C 3 of 12

Where May fits in the year

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

All twelve North America month rankings:

North America sea temperature map (live)

The map shows today's latest reading at every North America location. The list below is based on the typical May 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 North America locations in May

Sorted by the typical May 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 May mean
1 Puerto Arista Chiapas 30.5°C
2 Puerto Chiapas Chiapas 30.5°C
3 Mazunte Oaxaca 29.9°C
4 San Agustinillo Oaxaca 29.9°C
5 Zipolite beach Oaxaca 29.9°C
6 Pochutla Oaxaca 29.9°C
7 Puerto Angel Oaxaca 29.9°C
8 Puerto Salina Cruz Oaxaca 29.8°C
9 La Libertad Chiapas 29.8°C
10 Salina Cruz Oaxaca 29.8°C
11 La Crucecita Oaxaca 29.8°C
12 Tangolunda Oaxaca 29.8°C
13 Brisas de Zicatela Oaxaca 29.7°C
14 Huatulco Oaxaca 29.7°C
15 Puerto Escondido Oaxaca 29.7°C
16 Santa Maria Huatulco Oaxaca 29.7°C
17 Campeche Campeche 29.7°C
18 Seybaplaya Campeche 29.6°C
19 Maldonado Guerrero 29.5°C
20 Champoton Campeche 29.4°C
21 Bacalar Quintana Roo 29.4°C
22 Calderitas Quintana Roo 29.4°C
23 Chetumal Quintana Roo 29.4°C
24 Quentin Quintana Roo 29.4°C
25 Acapulco-C,Gro. Guerrero 29.3°C
Show 25 more ▸
26 C.Carmen Campeche 29.3°C
27 Frontera (Alvaro Obregon) Tabasco 29.2°C
28 Acapulco Guerrero 29.2°C
29 Tecoanapa Guerrero 29.2°C
30 Ciudad del Carmen Campeche 29.1°C
31 Isla de Aguada Campeche 29.1°C
32 Frontera Tabasco 29.0°C
33 Coatzacoalcos (Puerto Mexico) Veracruz 28.8°C
34 Xcalak Quintana Roo 28.8°C
35 Allende State of Veracruz 28.6°C
36 Coatzacoalcos State of Veracruz 28.6°C
37 Nanchital State of Veracruz 28.6°C
38 Costa Maya Quintana Roo 28.5°C
39 Mahahual Quintana Roo 28.5°C
40 Tulum Quintana Roo 28.5°C
41 Akumal Quintana Roo 28.5°C
42 Xpu Ha Quintana Roo 28.5°C
43 Isla Cozumel Quintana Roo 28.5°C
44 Howland Island Minor Outlying Islands 28.5°C
45 Puerto Moreles,QR Quintana Roo 28.4°C
46 Zihuatenajo,Gro. Guerrero 28.4°C
47 Ixtapa Guerrero 28.4°C
48 Mayakoba at Playa del Carmen Quintana Roo 28.4°C
49 Paamul Quintana Roo 28.4°C
50 Playa del Carmen Quintana Roo 28.4°C

Coldest 10 in North America in May

Same data the other way. Helpful if you want to know which North America coasts to avoid for swimming in May.

# Location May mean
1 Grise Fiord Nunavut -1.7°C
2 Cameron Island Nunavut -1.7°C
3 Iceberg Point Nunavut -1.7°C
4 Wrangel Bay Nunavut -1.7°C
5 Airstrip Point Nunavut -1.7°C
6 Cape Espenberg, Kotzebue Sound Alaska -1.7°C
7 Brevoort Harbour Nunavut -1.6°C
8 Alert Nunavut -1.6°C
9 Cape Sheridan Nunavut -1.6°C
10 Radstock Bay Nunavut -1.6°C

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