Skip to content
seatemperatures.net

Warmest sea in Mexico in September

192 coastal locations in Mexico ranked by their typical September sea temperature. Region-wide average in September: 28.9°C. The top of the list is where to find the warmest swimming this month.

Warmest in September

San Felipe

30.8°C September mean in Mexico

Regional September average

28.9°C

across all 192 coastal locations in Mexico

Vs annual mean

+2.8°C

above the year-round regional average

What the Mexico sea 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.

Mexico monthly average 23.4°C to 28.9°C
J
F
M
A
M
J
J
A
S
O
N
D
  • Warmest month August 28.9°C
  • Coldest month February 23.4°C
  • Annual mean 26.1°C
  • Months above 20°C 12 of 12

Where September fits in the year

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

All twelve Mexico month rankings:

Mexico sea temperature map (live)

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

Sorted by the typical September 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 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 Campeche Campeche 30.6°C
7 Bucerias Nayarit 30.6°C
8 Lo de Marcos Nayarit 30.6°C
9 Riviera Nayarit Nayarit 30.6°C
10 San Pancho Nayarit 30.6°C
11 Sayulita Nayarit 30.6°C
12 Puerto Chiapas Chiapas 30.5°C
13 Seybaplaya Campeche 30.5°C
14 Puerto Arista Chiapas 30.5°C
15 Bahia de Banderas Nayarit 30.5°C
16 Camahuiroa Sonora 30.5°C
17 Nuevo Vallarta Nayarit 30.5°C
18 La Reforma Sinaloa 30.4°C
19 Punta Mita Nayarit 30.4°C
20 Los Mochis 30.4°C
21 Mazatlan Sinaloa 30.4°C
22 Puerto Vallarta Jalisco 30.4°C
23 Yelapa Jalisco 30.4°C
24 Puertecitos Baja California 30.4°C
25 Cospita Sinaloa 30.4°C
Show 25 more ▸
26 Tecoanapa Guerrero 30.4°C
27 Bacalar Quintana Roo 30.4°C
28 Calderitas Quintana Roo 30.4°C
29 Chetumal Quintana Roo 30.4°C
30 Quentin Quintana Roo 30.4°C
31 Altata Sinaloa 30.3°C
32 Yavaros Sonora 30.3°C
33 Acapulco Guerrero 30.3°C
34 Maldonado Guerrero 30.3°C
35 Puerto Penasco Sonora 30.3°C
36 Topolobampo Sinaloa 30.3°C
37 Acapulco-C,Gro. Guerrero 30.3°C
38 Bahia Kino Sonora 30.3°C
39 Brisas de Zicatela Oaxaca 30.3°C
40 Puerto Escondido Oaxaca 30.3°C
41 Mazunte Oaxaca 30.3°C
42 San Agustinillo Oaxaca 30.3°C
43 Zipolite beach Oaxaca 30.3°C
44 La Libertad Chiapas 30.3°C
45 Troncones Guerrero 30.3°C
46 Pochutla Oaxaca 30.2°C
47 Puerto Angel Oaxaca 30.2°C
48 Zihuatenajo,Gro. Guerrero 30.2°C
49 Huatulco Oaxaca 30.2°C
50 Puerto Salina Cruz Oaxaca 30.2°C

Coldest 10 in Mexico in September

Same data the other way. Helpful if you want to know which Mexico coasts to avoid for swimming in September.

# Location September mean
1 San Quintin Baja California 20.1°C
2 Ensenada Baja California 20.2°C
3 Gonzaga Bay Baja California 20.2°C
4 Playa Hermosa 20.2°C
5 Primo Tapia Baja California 20.5°C
6 Puerto Nuevo Baja California 20.5°C
7 Tijuana Baja California 20.8°C
8 Rosarito Baja California 20.8°C
9 Guadalupe Island Baja California 21.1°C
10 Coronado Islands Baja California 21.2°C

More on this region