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Warmest sea in Costa Rica in October

54 coastal locations in Costa Rica ranked by their typical October sea temperature. Region-wide average in October: 28.7°C. The top of the list is where to find the warmest swimming this month.

Warmest in October

Puerto Limon

29.6°C October mean in Costa Rica

Regional October average

28.7°C

across all 54 coastal locations in Costa Rica

Vs annual mean

-0.1°C

below the year-round regional average

What the Costa Rica sea feels like in October

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.

Costa Rica monthly average 28.1°C to 29.5°C
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  • Warmest month May 29.5°C
  • Coldest month February 28.1°C
  • Annual mean 28.8°C
  • Months above 20°C 12 of 12

Where October fits in the year

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

All twelve Costa Rica month rankings:

Costa Rica sea temperature map (live)

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

Sorted by the typical October 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 October mean
1 Puerto Limon Limón 29.6°C
2 Punta Uva 29.6°C
3 Cahuita 29.6°C
4 Puerto Viejo 29.6°C
5 Limon 29.5°C
6 Playa Bonita 29.5°C
7 Tortuguero 29.5°C
8 Papagayo 28.7°C
9 Brasilito 28.7°C
10 Catalina Island 28.7°C
11 Palm Beach Estates 28.7°C
12 Playa Carbon 28.7°C
13 Playa Conchal 28.7°C
14 Playa Del Coco 28.7°C
15 Playa Flamingo 28.7°C
16 Playa Grande 28.7°C
17 Playa Hermosa 28.7°C
18 Playa Langosta 28.7°C
19 Playa Mina 28.7°C
20 Playa Nombre de Jesus 28.7°C
21 Playa Real y Roble 28.7°C
22 Playa Ventanas 28.7°C
23 Potrero 28.7°C
24 Tamarindo Beach 28.7°C
25 Guanacaste 28.6°C
Show 25 more ▸
26 Liberia 28.6°C
27 Los Pargos 28.6°C
28 Marbella 28.6°C
29 Playa Avellana 28.6°C
30 Playa Azul 28.6°C
31 Playa Mansita 28.6°C
32 Playa Negra 28.6°C
33 Jaco 28.6°C
34 Ojochal 28.5°C
35 Pavones 28.5°C
36 Uvita 28.5°C
37 Dominical 28.5°C
38 Chacarita 28.5°C
39 Puntarenas 28.5°C
40 Nandayure 28.5°C
41 Playa Carrillo 28.5°C
42 Punta Islita 28.5°C
43 San Jose 28.5°C
44 Nosara 28.4°C
45 Samara 28.4°C
46 Cano Island 28.4°C
47 Golfito 28.4°C
48 Manuel Antonio 28.4°C
49 Puerto Quepos 28.4°C
50 Quepos 28.4°C

Coldest 10 in Costa Rica in October

Same data the other way. Helpful if you want to know which Costa Rica coasts to avoid for swimming in October.

# Location October mean
1 Cocos Island 27.4°C
2 Mal Pais 28.4°C
3 Montezuma 28.4°C
4 Playa Santa Teresa 28.4°C
5 Cano Island 28.4°C
6 Golfito 28.4°C
7 Manuel Antonio 28.4°C
8 Puerto Quepos 28.4°C
9 Quepos 28.4°C
10 Nosara 28.4°C

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