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Warmest sea in Puerto Rico

73 coastal locations in Puerto Rico ranked by their year-round average sea temperature. The regional average is 28.3°C. The top of the list shows where to find the warmest water in a typical year. The bottom shows the coldest year-round coasts of the region.

Warmest location

Mayagüez, Puerto Rico

28.5°C annual mean in Puerto Rico

Regional average

28.3°C

across all 73 Puerto Rico coastal locations

Warmest month

September

29.7°C region-wide average

Puerto Rico monthly average 26.9°C to 29.7°C
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  • Warmest month September 29.7°C
  • Coldest month February 26.9°C
  • Annual mean 28.3°C
  • Months above 20°C 12 of 12

Month by month across Puerto Rico

Sea temperatures in Puerto Rico swing from 26.9°C in February to 29.7°C in September on average across every coast we track. That spread of 3°C hides much bigger swings at individual locations.

Want a specific month? Pick one for a dedicated ranking:

Puerto Rico sea temperature map

Today's pin colours show the latest daily reading at every Puerto Rico location we track. Pick any pin for the location's full page.

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 locations in Puerto Rico

The warmest coastal locations across all of Puerto Rico, sorted by year-round average. Click any place for its 30-day chart, monthly profile, and 10-year history.

# Location Annual mean
1 Mayagüez, Puerto Rico Mayagüez 28.5°C
2 Puerto Real, Puerto Rico (sub) Cabo Rojo 28.5°C
3 Punta Guanajibo, Mayagüez, Puerto Rico Cabo Rojo 28.5°C
4 Bahía Salinas, Puerto Rico Cabo Rojo 28.5°C
5 Magueyes Island, Caribbean Sea, Puerto Rico Lajas 28.5°C
6 Guanica, Puerto Rico Guánica 28.5°C
7 Peñuelas (Punta Guayanilla), Puerto Rico Peñuelas 28.5°C
8 La Parguera 28.4°C
9 Playa de Ponce, Puerto Rico Ponce 28.4°C
10 Puerto Ponce Ponce 28.4°C
11 Capitanejo Juana Díaz 28.4°C
12 Playa Cortada, Puerto Rico Juana Díaz 28.4°C
13 Santa Isabel, Puerto Rico Santa Isabel 28.4°C
14 Boqueron 28.4°C
15 Cabo Rojo 28.4°C
16 Mayaguez 28.4°C
17 Puerto Real 28.4°C
18 Arroyo, Puerto Rico Arroyo 28.4°C
19 Jobos Guayama 28.4°C
20 Las Mareas, Puerto Rico Guayama 28.4°C
21 Palmas Arroyo 28.4°C
22 Mona Island, Puerto Rico Mayagüez 28.4°C
23 Puerto Maunabo, Puerto Rico Maunabo 28.4°C
24 Punta Tuna Maunabo 28.4°C
25 Yabucoa Harbor, Puerto Rico Yabucoa 28.4°C
Show 25 more ▸
26 Ponce 28.3°C
27 Aguadilla, Crashboat Beach, Puerto Rico Aguadilla 28.3°C
28 Tallaboa 28.3°C
29 Jauca 28.3°C
30 Naguabo, Puerto Rico Naguabo 28.3°C
31 Playita Cortada 28.3°C
32 Potala Pastillo 28.3°C
33 Roosevelt Roads, Puerto Rico Ceiba 28.3°C
34 Arroyo 28.3°C
35 Central Aguirre 28.3°C
36 Esperanza, Vieques Island, Puerto Rico Vieques 28.3°C
37 Puerto Ferro, Isla de Vieques, Puerto Rico Vieques 28.3°C
38 Punta Mulas, Isla de Vieques, Puerto Rico Vieques 28.3°C
39 Emajagua 28.2°C
40 Lamboglia 28.2°C
41 Palmas 28.2°C
42 Punta Santiago 28.2°C
43 Fajardo, Puerto Rico Fajardo 28.2°C
44 Isla Palominos, Puerto Rico Fajardo 28.2°C
45 Playa de Fajardo, Puerto Rico Fajardo 28.2°C
46 Aguadilla 28.2°C
47 Isabela 28.2°C
48 La Playa 28.2°C
49 Rincon 28.2°C
50 Culebra, Puerto Rico Culebra 28.2°C

Coldest 10 in Puerto Rico for contrast

Same data, sorted the other way. Useful if you want to know which Puerto Rico coasts stay coldest year-round.

# Location Annual mean
1 Carolina 28.0°C
2 Loiza 28.0°C
3 Bayamn 28.0°C
4 Catano 28.0°C
5 Culebra 28.0°C
6 Fajardo 28.0°C
7 Flamenco Beach 28.0°C
8 Isla Verde 28.0°C
9 Levittown 28.0°C
10 Luquillo 28.0°C

More on this region