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Coldest sea in Puerto Rico

73 coastal locations in Puerto Rico ranked by year-round average sea temperature, coldest first. The regional average is 28.3°C. The top of the list is where the water stays cold all year. The contrast list at the bottom shows the warmest coasts for context.

Coldest location

Carolina

Year-round average 28.0°C in Puerto Rico

Regional average

28.3°C

across all 73 Puerto Rico coastal locations

Coldest month

February

26.9°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. Cool blues cluster around the high-latitude coasts.

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 coldest locations in Puerto Rico

Coastal locations across Puerto Rico sorted by year-round average, coldest first. Honest cold-water swimming country. Click any place for its 30-day chart, monthly profile, and 10-year history.

# 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
11 Playa Fortuna 28.0°C
12 San Juan 28.0°C
13 Esperanza 28.1°C
14 Isabel Segunda 28.1°C
15 Vieques 28.1°C
16 Arecibo 28.1°C
17 Jobos 28.1°C
18 Bayamón Bayamón 28.2°C
19 San Juan, La Puntilla, San Juan Bay, Puerto Rico San Juan 28.2°C
20 Carrizales 28.2°C
21 Hatillo 28.2°C
22 Culebrita, Isla, Puerto Rico Culebra 28.2°C
23 Culebra, Puerto Rico Culebra 28.2°C
24 Ensenada Honda, Culebra Island, Puerto Rico Culebra 28.2°C
25 Aguadilla 28.2°C
Show 25 more ▸
26 Isabela 28.2°C
27 La Playa 28.2°C
28 Rincon 28.2°C
29 Fajardo, Puerto Rico Fajardo 28.2°C
30 Isla Palominos, Puerto Rico Fajardo 28.2°C
31 Playa de Fajardo, Puerto Rico Fajardo 28.2°C
32 Emajagua 28.2°C
33 Lamboglia 28.2°C
34 Palmas 28.2°C
35 Punta Santiago 28.2°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 Arroyo 28.3°C
40 Central Aguirre 28.3°C
41 Jauca 28.3°C
42 Naguabo, Puerto Rico Naguabo 28.3°C
43 Playita Cortada 28.3°C
44 Potala Pastillo 28.3°C
45 Roosevelt Roads, Puerto Rico Ceiba 28.3°C
46 Tallaboa 28.3°C
47 Aguadilla, Crashboat Beach, Puerto Rico Aguadilla 28.3°C
48 Ponce 28.3°C
49 Puerto Maunabo, Puerto Rico Maunabo 28.4°C
50 Punta Tuna Maunabo 28.4°C

Warmest 10 in Puerto Rico for contrast

Same data flipped. Useful if you want to know which Puerto Rico coasts stay warmest year-round before you commit to a cold-water swim trip.

# 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

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