Sea weather in Playa Arenillas in Costa Rica All the beach weather in Playa Arenillas

All the essential weather information for enjoying the beach in Playa Arenillas in Costa Rica, for swimming, tanning or water sports! Our sea weather data is reliable, easy to read and updated every day.

Weather: When should you go to the beach in Playa Arenillas over the next 7 days?

Discover the best moment to go to the beach in Playa Arenillas in Costa Rica this week to enjoy the best weather and calmest sea possible. Our opinion is based on reliable sea weather forecasts in Playa Arenillas. You can see full forecasts by clicking on the day you want to see in the table below.

Date Outside temp. Our opinion
Saturday 13 December 202577°F to 85°Frecommended
Sunday 14 December 202576°F to 83°Frecommended
Monday 15 December 202577°F to 83°Fdiscouraged
Tuesday 16 December 202577°F to 83°Fdiscouraged
Wednesday 17 December 202576°F to 85°Frecommended
Thursday 18 December 202576°F to 85°Frecommended
Friday 19 December 202576°F to 85°Fdiscouraged

Sea Weather: Your daily and hourly sea weather in Playa Arenillas

Sea weather on Saturday 13 December 2025

On Saturday 13 December 2025, the sun will rise at 05:52 and will set at 17:23 on the beach(es) of Playa Arenillas. The outside temperature will be a high of 85°F t and a low of 77°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 11.8mph km/h (with gusts up to 19.9mph). Wave height will be up to 2ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature25°C (78°F)25°C (77°F)25°C (77°F)27°C (81°F)28°C (83°F)29°C (84°F)28°C (82°F)26°C (79°F)
Perceived temperature28°C (82°F)27°C (81°F)27°C (81°F)30°C (87°F)31°C (88°F)32°C (90°F)31°C (87°F)28°C (83°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity81%82%81%76%69%65%73%75%
Barometric pressure1010 hPa1009 hPa1010 hPa1011 hPa1009 hPa1006 hPa1008 hPa1011 hPa
Cloud cover39%45%49%80%79%35%74%10%
Heat index28°C (82°F)27°C (81°F)27°C (81°F)30°C (87°F)31°C (88°F)32°C (90°F)31°C (87°F)28°C (83°F)
Dew point22°C (71°F)22°C (71°F)22°C (71°F)23°C (73°F)22°C (72°F)22°C (71°F)22°C (72°F)21°C (70°F)
Wind
Speed9km/h (6mph)13km/h (8mph)14km/h (9mph)18km/h (11mph)15km/h (9mph)16km/h (10mph)19km/h (12mph)18km/h (11mph)
Gusts15km/h (9mph)20km/h (12mph)21km/h (13mph)24km/h (15mph)22km/h (14mph)24km/h (15mph)32km/h (20mph)30km/h (18mph)
Direction 67°
ENE
58°
ENE
54°
NE
56°
NE
37°
NE
35°
NE
44°
NE
66°
ENE
Wind chill25°C (78°F)25°C (77°F)25°C (77°F)27°C (81°F)28°C (83°F)29°C (84°F)28°C (82°F)26°C (79°F)
Waves
Height0.5m (1.7ft)0.5m (1.7ft)0.6m (1.8ft)0.6m (2.1ft)0.6m (1.9ft)0.6m (1.9ft)0.6m (2.0ft)0.6m (2.0ft)
Direction 242°
WSW
244°
WSW
244°
WSW
243°
WSW
243°
WSW
244°
WSW
246°
WSW
248°
WSW
Period6.7 sec.6.8 sec.6.8 sec.6.9 sec.7.0 sec.7.0 sec.7.0 sec.6.9 sec.
Significant height0.4m (1.3ft)0.4m (1.3ft)0.7m (2.3ft)0.8m (2.6ft)0.5m (1.6ft)0.7m (2.3ft)0.6m (2ft)0.7m (2.3ft)
Sea water temperature
Water temperature26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)

Sea weather on Sunday 14 December 2025

On Sunday 14 December 2025, the sun will rise at 05:52 and will set at 17:23 on the beach(es) of Playa Arenillas. The outside temperature will be a high of 83°F t and a low of 76°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 12.4mph km/h (with gusts up to 20.5mph). Wave height will be up to 2.3ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature25°C (77°F)25°C (76°F)24°C (76°F)27°C (80°F)28°C (82°F)28°C (83°F)27°C (80°F)26°C (78°F)
Perceived temperature27°C (81°F)26°C (80°F)26°C (79°F)29°C (84°F)30°C (86°F)31°C (89°F)30°C (85°F)28°C (82°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity77%80%83%74%70%70%78%78%
Barometric pressure1011 hPa1009 hPa1011 hPa1013 hPa1011 hPa1009 hPa1010 hPa1012 hPa
Cloud cover12%9%15%17%73%82%86%17%
Heat index27°C (81°F)26°C (80°F)26°C (79°F)29°C (84°F)30°C (86°F)31°C (89°F)30°C (85°F)28°C (82°F)
Dew point21°C (69°F)21°C (70°F)21°C (70°F)22°C (71°F)22°C (71°F)22°C (72°F)23°C (73°F)22°C (71°F)
Wind
Speed13km/h (8mph)10km/h (6mph)10km/h (6mph)13km/h (8mph)12km/h (8mph)18km/h (11mph)20km/h (13mph)20km/h (12mph)
Gusts19km/h (12mph)16km/h (10mph)15km/h (10mph)18km/h (11mph)18km/h (11mph)27km/h (17mph)33km/h (21mph)31km/h (19mph)
Direction 69°
ENE
68°
ENE
72°
ENE
63°
ENE
12°
NNE
23°
NNE
46°
NE
60°
ENE
Wind chill25°C (77°F)25°C (76°F)24°C (76°F)27°C (80°F)28°C (82°F)28°C (83°F)27°C (80°F)26°C (78°F)
Waves
Height0.6m (2.0ft)0.6m (1.9ft)0.6m (2.0ft)0.6m (2.0ft)0.6m (1.9ft)0.7m (2.2ft)0.7m (2.3ft)0.7m (2.2ft)
Direction 250°
WSW
251°
WSW
252°
WSW
252°
WSW
238°
WSW
240°
WSW
241°
WSW
241°
WSW
Period6.8 sec.6.7 sec.6.7 sec.6.7 sec.6.7 sec.6.7 sec.6.6 sec.6.5 sec.
Significant height0.6m (2ft)0.6m (2ft)0.7m (2.3ft)0.6m (2ft)0.7m (2.3ft)0.9m (3ft)1.0m (3.3ft)0.8m (2.6ft)
Sea water temperature
Water temperature26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)

Sea weather on Monday 15 December 2025

On Monday 15 December 2025, the sun will rise at 05:53 and will set at 17:24 on the beach(es) of Playa Arenillas. The outside temperature will be a high of 83°F t and a low of 77°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 15.5mph km/h (with gusts up to 23mph). Wave height will be up to 3ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature26°C (78°F)25°C (77°F)25°C (77°F)26°C (80°F)27°C (81°F)28°C (83°F)27°C (80°F)26°C (78°F)
Perceived temperature28°C (82°F)27°C (81°F)27°C (81°F)29°C (84°F)29°C (85°F)31°C (88°F)29°C (85°F)28°C (82°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity78%79%81%75%66%66%76%77%
Barometric pressure1011 hPa1010 hPa1011 hPa1014 hPa1011 hPa1008 hPa1010 hPa1012 hPa
Cloud cover15%19%20%71%26%27%27%17%
Heat index28°C (82°F)27°C (81°F)27°C (81°F)29°C (84°F)29°C (85°F)31°C (88°F)29°C (85°F)28°C (82°F)
Dew point21°C (71°F)21°C (70°F)21°C (71°F)22°C (71°F)21°C (69°F)21°C (70°F)22°C (72°F)21°C (70°F)
Wind
Speed19km/h (12mph)21km/h (13mph)25km/h (15mph)23km/h (14mph)21km/h (13mph)22km/h (14mph)23km/h (15mph)21km/h (13mph)
Gusts29km/h (18mph)31km/h (19mph)36km/h (22mph)29km/h (18mph)31km/h (19mph)33km/h (21mph)37km/h (23mph)33km/h (20mph)
Direction 55°
NE
48°
NE
46°
NE
54°
NE
38°
NE
38°
NE
42°
NE
53°
NE
Wind chill26°C (78°F)25°C (77°F)25°C (77°F)26°C (80°F)27°C (81°F)28°C (83°F)27°C (80°F)26°C (78°F)
Waves
Height0.6m (2.0ft)0.7m (2.5ft)0.9m (2.9ft)0.8m (2.7ft)0.9m (2.9ft)0.7m (2.2ft)0.7m (2.5ft)0.8m (2.6ft)
Direction 242°
WSW
235°
SW
236°
WSW
238°
WSW
238°
WSW
238°
WSW
238°
WSW
232°
SW
Period6.4 sec.6.3 sec.6.1 sec.6.1 sec.6.1 sec.6.1 sec.6.2 sec.6.1 sec.
Significant height0.8m (2.6ft)1.2m (3.9ft)1.3m (4.3ft)1.1m (3.6ft)1.2m (3.9ft)0.8m (2.6ft)1.1m (3.6ft)1.0m (3.3ft)
Sea water temperature
Water temperature26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)

Sea weather on Tuesday 16 December 2025

On Tuesday 16 December 2025, the sun will rise at 05:53 and will set at 17:24 on the beach(es) of Playa Arenillas. The outside temperature will be a high of 83°F t and a low of 77°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 14.3mph km/h (with gusts up to 19.9mph). Wave height will be up to 2.6ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature25°C (77°F)25°C (77°F)25°C (76°F)26°C (79°F)27°C (81°F)28°C (82°F)27°C (80°F)25°C (78°F)
Perceived temperature27°C (81°F)27°C (80°F)27°C (80°F)28°C (83°F)29°C (84°F)30°C (87°F)29°C (84°F)27°C (81°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity77%79%79%73%69%66%74%76%
Barometric pressure1011 hPa1009 hPa1010 hPa1012 hPa1010 hPa1008 hPa1010 hPa1011 hPa
Cloud cover13%20%10%24%36%21%24%18%
Heat index27°C (81°F)27°C (80°F)27°C (80°F)28°C (83°F)29°C (84°F)30°C (87°F)29°C (84°F)27°C (81°F)
Dew point21°C (70°F)21°C (69°F)21°C (70°F)21°C (70°F)21°C (70°F)21°C (70°F)22°C (71°F)21°C (69°F)
Wind
Speed22km/h (14mph)22km/h (13mph)19km/h (12mph)23km/h (15mph)22km/h (13mph)20km/h (12mph)20km/h (13mph)18km/h (11mph)
Gusts32km/h (20mph)32km/h (20mph)29km/h (18mph)30km/h (19mph)32km/h (20mph)30km/h (19mph)32km/h (20mph)28km/h (18mph)
Direction 52°
NE
50°
NE
54°
NE
50°
NE
40°
NE
44°
NE
50°
NE
64°
ENE
Wind chill25°C (77°F)25°C (77°F)25°C (76°F)26°C (79°F)27°C (81°F)28°C (82°F)27°C (80°F)25°C (78°F)
Waves
Height0.7m (2.4ft)0.8m (2.6ft)0.8m (2.6ft)0.7m (2.3ft)0.6m (2.1ft)0.7m (2.3ft)0.8m (2.6ft)0.7m (2.3ft)
Direction 234°
SW
234°
SW
234°
SW
234°
SW
237°
WSW
238°
WSW
239°
WSW
228°
SW
Period6.1 sec.13.6 sec.13.5 sec.13.5 sec.13.5 sec.13.3 sec.12.8 sec.12.7 sec.
Significant height0.9m (3ft)1.1m (3.6ft)1.1m (3.6ft)0.8m (2.6ft)0.8m (2.6ft)1.0m (3.3ft)1.1m (3.6ft)0.9m (3ft)
Sea water temperature
Water temperature26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)

Sea weather on Wednesday 17 December 2025

On Wednesday 17 December 2025, the sun will rise at 05:54 and will set at 17:24 on the beach(es) of Playa Arenillas. The outside temperature will be a high of 85°F t and a low of 76°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 8.7mph km/h (with gusts up to 11.8mph). Wave height will be up to 2ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature25°C (76°F)24°C (75°F)24°C (75°F)26°C (79°F)24°C (76°F)29°C (84°F)27°C (81°F)26°C (79°F)
Perceived temperature27°C (80°F)26°C (79°F)26°C (79°F)28°C (83°F)26°C (79°F)31°C (88°F)30°C (86°F)28°C (82°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity78%82%83%73%65%61%73%74%
Barometric pressure1011 hPa1009 hPa1010 hPa1012 hPa1010 hPa1007 hPa1009 hPa1011 hPa
Cloud cover24%17%13%11%8%15%85%12%
Heat index27°C (80°F)26°C (79°F)26°C (79°F)28°C (83°F)26°C (79°F)31°C (88°F)30°C (86°F)28°C (82°F)
Dew point21°C (69°F)21°C (69°F)21°C (70°F)21°C (70°F)17°C (63°F)21°C (69°F)22°C (72°F)21°C (70°F)
Wind
Speed12km/h (8mph)12km/h (7mph)11km/h (7mph)14km/h (9mph)7km/h (4mph)6km/h (4mph)4km/h (2mph)5km/h (3mph)
Gusts19km/h (12mph)18km/h (11mph)16km/h (10mph)19km/h (12mph)14km/h (9mph)9km/h (6mph)7km/h (4mph)7km/h (5mph)
Direction 73°
ENE
76°
ENE
67°
ENE
70°
ENE
13°
NNE
47°
NE
90°
E
74°
ENE
Wind chill25°C (76°F)24°C (75°F)24°C (75°F)26°C (79°F)24°C (76°F)29°C (84°F)27°C (81°F)26°C (79°F)
Waves
Height0.6m (1.9ft)0.5m (1.7ft)0.5m (1.7ft)0.5m (1.7ft)0.5m (1.6ft)0.5m (1.6ft)0.5m (1.6ft)0.5m (1.7ft)
Direction 230°
SW
235°
SW
235°
SW
236°
WSW
237°
WSW
238°
WSW
235°
SW
234°
SW
Period12.7 sec.12.6 sec.12.6 sec.12.6 sec.12.4 sec.14.4 sec.14.0 sec.13.7 sec.
Significant height0.6m (2ft)0.5m (1.6ft)0.5m (1.6ft)0.4m (1.3ft)0.4m (1.3ft)0.4m (1.3ft)0.4m (1.3ft)0.4m (1.3ft)
Sea water temperature
Water temperature28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)

Sea weather on Thursday 18 December 2025

On Thursday 18 December 2025, the sun will rise at 05:54 and will set at 17:25 on the beach(es) of Playa Arenillas. The outside temperature will be a high of 85°F t and a low of 76°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 6.8mph km/h (with gusts up to 10.6mph). Wave height will be up to 1.6ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature26°C (78°F)25°C (76°F)24°C (76°F)26°C (79°F)24°C (76°F)29°C (83°F)26°C (80°F)26°C (79°F)
Perceived temperature28°C (82°F)27°C (80°F)26°C (79°F)28°C (83°F)26°C (78°F)31°C (87°F)29°C (84°F)28°C (83°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity76%79%80%71%62%60%75%77%
Barometric pressure1010 hPa1009 hPa1011 hPa1012 hPa1010 hPa1008 hPa1009 hPa1011 hPa
Cloud cover7%16%12%7%0%29%12%10%
Heat index28°C (82°F)27°C (80°F)26°C (79°F)28°C (83°F)26°C (78°F)31°C (87°F)29°C (84°F)28°C (83°F)
Dew point21°C (70°F)21°C (69°F)21°C (69°F)21°C (69°F)17°C (62°F)20°C (68°F)22°C (71°F)22°C (71°F)
Wind
Speed8km/h (5mph)9km/h (6mph)11km/h (7mph)11km/h (7mph)3km/h (2mph)4km/h (2mph)8km/h (5mph)11km/h (7mph)
Gusts12km/h (8mph)14km/h (9mph)17km/h (11mph)15km/h (9mph)7km/h (4mph)6km/h (3mph)15km/h (9mph)17km/h (11mph)
Direction 74°
ENE
81°
E
81°
E
77°
ENE
330°
NNW
249°
WSW
350°
N
83°
E
Wind chill26°C (78°F)25°C (76°F)24°C (76°F)26°C (79°F)24°C (76°F)29°C (83°F)26°C (80°F)26°C (79°F)
Waves
Height0.5m (1.6ft)0.5m (1.6ft)0.5m (1.6ft)0.5m (1.6ft)0.5m (1.5ft)0.5m (1.5ft)0.5m (1.5ft)0.5m (1.6ft)
Direction 234°
SW
234°
SW
234°
SW
235°
SW
236°
WSW
238°
WSW
233°
SW
233°
SW
Period13.6 sec.13.6 sec.13.5 sec.13.5 sec.13.4 sec.13.2 sec.12.9 sec.12.7 sec.
Significant height0.5m (1.6ft)0.5m (1.6ft)0.4m (1.3ft)0.4m (1.3ft)0.5m (1.6ft)0.4m (1.3ft)0.4m (1.3ft)0.4m (1.3ft)
Sea water temperature
Water temperature28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)28°C (82°F)

Sea weather on Friday 19 December 2025

On Friday 19 December 2025, the sun will rise at 05:55 and will set at 17:25 on the beach(es) of Playa Arenillas. The outside temperature will be a high of 85°F t and a low of 76°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 13.1mph km/h (with gusts up to 19.9mph). Wave height will be up to 2ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature25°C (77°F)25°C (76°F)24°C (76°F)27°C (80°F)28°C (82°F)29°C (83°F)27°C (80°F)26°C (78°F)
Perceived temperature27°C (81°F)26°C (80°F)26°C (79°F)29°C (84°F)30°C (86°F)31°C (88°F)29°C (85°F)28°C (82°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity79%80%81%68%63%65%76%77%
Barometric pressure1010 hPa1009 hPa1011 hPa1012 hPa1010 hPa1008 hPa1009 hPa1011 hPa
Cloud cover12%8%32%8%25%78%20%15%
Heat index27°C (81°F)26°C (80°F)26°C (79°F)29°C (84°F)30°C (86°F)31°C (88°F)29°C (85°F)28°C (82°F)
Dew point21°C (70°F)21°C (70°F)21°C (69°F)20°C (69°F)20°C (68°F)21°C (71°F)22°C (72°F)21°C (70°F)
Wind
Speed12km/h (7mph)10km/h (6mph)12km/h (8mph)14km/h (9mph)9km/h (6mph)17km/h (11mph)21km/h (13mph)19km/h (12mph)
Gusts18km/h (11mph)16km/h (10mph)19km/h (12mph)19km/h (12mph)14km/h (9mph)25km/h (16mph)32km/h (20mph)29km/h (18mph)
Direction 65°
ENE
66°
ENE
66°
ENE
64°
ENE

N
26°
NNE
56°
NE
62°
ENE
Wind chill25°C (77°F)25°C (76°F)24°C (76°F)27°C (80°F)28°C (82°F)29°C (83°F)27°C (80°F)26°C (78°F)
Waves
Height0.5m (1.6ft)0.5m (1.6ft)0.5m (1.7ft)0.5m (1.7ft)0.5m (1.6ft)0.5m (1.7ft)0.6m (1.9ft)0.5m (1.6ft)
Direction 234°
SW
234°
SW
235°
SW
236°
SW
237°
WSW
238°
WSW
233°
SW
233°
SW
Period12.7 sec.12.7 sec.12.6 sec.12.5 sec.12.5 sec.12.4 sec.12.2 sec.12.2 sec.
Significant height0.4m (1.3ft)0.5m (1.6ft)0.7m (2.3ft)0.6m (2ft)0.5m (1.6ft)0.6m (2ft)0.8m (2.6ft)0.5m (1.6ft)
Sea water temperature
Water temperature26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)

Sea weather chart over the next 7 days

Outside temperature

Wind speed

Precipitation

Wave height

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