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Warmest sea in Puerto Rico in December

73 coastal locations in Puerto Rico ranked by their typical December sea temperature. Region-wide average in December: 28.0°C. The top of the list is where to find the warmest swimming this month.

Warmest in December

Mayagüez, Puerto Rico

28.2°C December mean in Puerto Rico

Regional December average

28.0°C

across all 73 coastal locations in Puerto Rico

Vs annual mean

-0.3°C

below the year-round regional average

What the Puerto Rico sea feels like in December

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.

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

Where December fits in the year

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

All twelve Puerto Rico month rankings:

Puerto Rico sea temperature map (live)

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

Sorted by the typical December 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 December mean
1 Mayagüez, Puerto Rico Mayagüez 28.2°C
2 Puerto Real, Puerto Rico (sub) Cabo Rojo 28.2°C
3 Punta Guanajibo, Mayagüez, Puerto Rico Cabo Rojo 28.2°C
4 Bahía Salinas, Puerto Rico Cabo Rojo 28.2°C
5 Magueyes Island, Caribbean Sea, Puerto Rico Lajas 28.2°C
6 La Parguera 28.2°C
7 Boqueron 28.1°C
8 Cabo Rojo 28.1°C
9 Mayaguez 28.1°C
10 Puerto Real 28.1°C
11 Guanica, Puerto Rico Guánica 28.1°C
12 Peñuelas (Punta Guayanilla), Puerto Rico Peñuelas 28.1°C
13 Mona Island, Puerto Rico Mayagüez 28.1°C
14 Playa de Ponce, Puerto Rico Ponce 28.1°C
15 Puerto Ponce Ponce 28.1°C
16 Tallaboa 28.1°C
17 Capitanejo Juana Díaz 28.1°C
18 Jauca 28.1°C
19 Playa Cortada, Puerto Rico Juana Díaz 28.1°C
20 Playita Cortada 28.1°C
21 Ponce 28.1°C
22 Potala Pastillo 28.1°C
23 Santa Isabel, Puerto Rico Santa Isabel 28.1°C
24 Arroyo 28.0°C
25 Central Aguirre 28.0°C
Show 25 more ▸
26 Arroyo, Puerto Rico Arroyo 28.0°C
27 Jobos Guayama 28.0°C
28 Lamboglia 28.0°C
29 Las Mareas, Puerto Rico Guayama 28.0°C
30 Palmas Arroyo 28.0°C
31 Puerto Maunabo, Puerto Rico Maunabo 28.0°C
32 Punta Tuna Maunabo 28.0°C
33 Yabucoa Harbor, Puerto Rico Yabucoa 28.0°C
34 Emajagua 28.0°C
35 Palmas 28.0°C
36 Punta Santiago 28.0°C
37 Aguadilla, Crashboat Beach, Puerto Rico Aguadilla 28.0°C
38 Aguadilla 28.0°C
39 Isabela 28.0°C
40 La Playa 28.0°C
41 Rincon 28.0°C
42 Naguabo, Puerto Rico Naguabo 27.9°C
43 Roosevelt Roads, Puerto Rico Ceiba 27.9°C
44 Bayamón Bayamón 27.9°C
45 Carrizales 27.9°C
46 Hatillo 27.9°C
47 San Juan, La Puntilla, San Juan Bay, Puerto Rico San Juan 27.9°C
48 Arecibo 27.9°C
49 Esperanza, Vieques Island, Puerto Rico Vieques 27.9°C
50 Fajardo, Puerto Rico Fajardo 27.9°C

Coldest 10 in Puerto Rico in December

Same data the other way. Helpful if you want to know which Puerto Rico coasts to avoid for swimming in December.

# Location December mean
1 Culebra 27.8°C
2 Flamenco Beach 27.8°C
3 Carolina 27.9°C
4 Esperanza 27.9°C
5 Fajardo 27.9°C
6 Isabel Segunda 27.9°C
7 Loiza 27.9°C
8 Luquillo 27.9°C
9 Playa Fortuna 27.9°C
10 Vieques 27.9°C

More on this region