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Sea temperature in Mexico in September
29°Ctropical · monthly average
The sea around Mexico averages 29°C in September. Warm enough for relaxed swimming with no wetsuit needed.
Monthly sea temperatures across the year
Best swim months
Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec
Warmest month
June (29°C)
Coolest month
January (25°C)
Best beaches in Mexico
Quintana Roo
Playa Delfines
Popular Quintana Roo beach near Cancún.
Quintana Roo
Playa Marlin
Popular Quintana Roo beach near Cancún.
Quintana Roo
Playa Tortugas
Popular Quintana Roo beach near Cancún.
Quintana Roo
Playa Caracol
Popular Quintana Roo beach near Cancún.
Quintana Roo
Playa Chac Mool
Popular Quintana Roo beach near Cancún.
Quintana Roo
Playa Forum
Popular Quintana Roo beach near Cancún.
Quintana Roo
Playa Norte Isla Mujeres
Popular Quintana Roo beach near Isla Mujeres.
Quintana Roo
Playa Paraiso Isla
Popular Quintana Roo beach near Isla Mujeres.
Quintana Roo
Playa Lancheros
Popular Quintana Roo beach near Isla Mujeres.