Water temperature in Manzanillo (Costa Rica) in August

Is it warm enough to swim in Manzanillo in August? Average water temperature in Manzanillo in August is 28.7°C and therefore suitable for comfortable swimming. The warmest sea in Manzanillo in August is 30°C, and the coldest is 27.5°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Manzanillo

Changes water temperature in Manzanillo in August 2025, 2024

To get an accurate forecast for the water temperature in Manzanillo for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Manzanillo, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of August.

Sea temperature

Tides

Weather forecast

You can choose any other years:

Day	2025	2024	Min	Max
1 August	28.4°C	28.8°C	27.7°C	29.2°C
2 August	28.6°C	28.6°C	27.7°C	29.1°C
3 August	28.5°C	28.6°C	27.6°C	29.2°C
4 August	28.5°C	28.5°C	27.6°C	29.3°C
5 August	28.6°C	28.7°C	27.7°C	29.2°C
6 August	28.6°C	28.7°C	27.7°C	29.2°C
7 August	28.6°C	28.8°C	27.8°C	29.5°C
8 August	28.9°C	28.8°C	27.9°C	29.3°C
9 August	28.7°C	28.7°C	27.9°C	29.3°C
10 August	28.6°C	28.6°C	27.9°C	29.3°C
11 August	28.7°C	28.9°C	28.1°C	29.2°C
12 August	28.7°C	28.9°C	28.1°C	29.3°C
13 August	28.9°C	28.9°C	28.1°C	29.2°C
14 August	28.9°C	29.1°C	28.2°C	29.2°C
15 August	28.9°C	29.2°C	28.2°C	29.2°C

Day	2025	2024	Min	Max
16 August	28.9°C	29.2°C	27.9°C	29.2°C
17 August	28.8°C	29.1°C	27.9°C	29.1°C
18 August	28.8°C	29.3°C	27.8°C	29.3°C
19 August	28.9°C	29.4°C	28°C	29.4°C
20 August	29.1°C	29.3°C	28°C	29.3°C
21 August	29.1°C	29.2°C	27.5°C	29.2°C
22 August	29°C	29.1°C	27.9°C	29.2°C
23 August	29°C	29°C	28.1°C	29.2°C
24 August	29°C	29.2°C	28.2°C	29.5°C
25 August	29.1°C	29.2°C	28.1°C	29.4°C
26 August	29.1°C	29.5°C	28.2°C	29.5°C
27 August	29.1°C	29.4°C	28.3°C	29.5°C
28 August	29.1°C	29.8°C	28.5°C	29.8°C
29 August	29.1°C	29.8°C	28.6°C	29.8°C
30 August	29.6°C	29.8°C	28.4°C	30°C
31 August	29.3°C	29.7°C	28.3°C	30°C

Average water temperature in Manzanillo in August over a decade

2016	2017	2018	2019	2020
28.8°C	29.1°C	28.3°C	28.6°C	29.1°C

2021	2022	2023	2024	2025
28.8°C	28.7°C	29.2°C	29.1°C	28.6°C

Manzanillo sea state in August

Chart comparing the height of waves in Manzanillo in August over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Manzanillo water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Temperature in neighboring cities

The nearest locations with the average water temperature in August. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

	Avr	Min	Max
Almirante	28.8°C	27.5°C	30.6°C
Uvita	28.9°C	27.6°C	30.8°C
Golfito	28.8°C	27.9°C	30.6°C
Costa Ballena	28.9°C	27.6°C	30.8°C
Dominical	28.9°C	27.6°C	30.8°C
Puerto Armuelles	28.8°C	27.8°C	30.4°C
Playa Matapalo (Osa Peninsula)	28.8°C	27.8°C	30.5°C
Manuel Antonio	28.9°C	27.6°C	30.7°C
Quepos	28.9°C	27.6°C	30.6°C
Cano Island	28.8°C	27.7°C	30.5°C

Manzanillo photo gallery

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Our report for Manzanillo is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

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Date (day and month)

Water temperature: min 16°C

Average temperature Maximum temperature