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Water temperature in Olhao in May

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Is it warm enough to swim in Olhao in May? Average water temperature in Olhao in May is 18°C and therefore is not suitable for comfortable swimming. The warmest sea in Olhao in May is 21.6°C, and the coldest is 15.7°C. Average high air temperature in Olhao in May is 22°C, and average low temperature is 12°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Olhao

Changes water temperature in Olhao in May 2025, 2024

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

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
1 May17.5°C16.1°C15.9°C19.2°C
2 May17.6°C15.7°C15.7°C19.1°C
3 May17.6°C16.1°C16°C18.9°C
4 May17.7°C16.3°C16°C18.9°C
5 May17.8°C16.7°C15.9°C18.7°C
6 May18.2°C16.4°C15.9°C18.7°C
7 May17.9°C16.3°C16.1°C18.8°C
8 May17.7°C17.1°C16.4°C19.1°C
9 May17.6°C17°C16.7°C19.2°C
10 May17.5°C17.7°C16.7°C19°C
11 May17.5°C17.7°C16.9°C19.5°C
12 May17.7°C17.3°C16.7°C19.5°C
13 May17.1°C17.7°C16.5°C19.4°C
14 May17.1°C17.4°C16.5°C19.5°C
15 May17°C16.9°C16.7°C19.5°C
Day 2025 2024 Min Max
16 May16.7°C16.5°C16.5°C19.4°C
17 May17.6°C16.7°C16.7°C19.5°C
18 May17.5°C16.5°C16.4°C19.6°C
19 May17.3°C16.2°C16.2°C19.8°C
20 May17.6°C16.2°C16.1°C19.8°C
21 May17.7°C15.7°C15.7°C20.2°C
22 May17.5°C16.3°C16.3°C20.3°C
23 May18.3°C16.4°C16.4°C20.3°C
24 May18.5°C16.7°C16.5°C20.8°C
25 May18.9°C17°C16.6°C20.6°C
26 May19.2°C17°C16.9°C20.9°C
27 May19.1°C17.1°C16.7°C21°C
28 May19.5°C17.4°C16.5°C21.3°C
29 May19.9°C18.1°C16.5°C21.4°C
30 May20.7°C18.6°C16.6°C21.6°C
31 May21.4°C19°C16.9°C21.4°C
Olhao water temp chart in May

Average water temperature in Olhao in May over a decade

20162017201820192020
17.8°C18.9°C17.1°C17.5°C18.7°C
20212022202320242025
17.6°C18.5°C18.4°C16.9°C18.1°C

Olhao sea state in May

Chart comparing the height of waves in Olhao in May 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.

Waves height in Olhao in May

Weather and climate in Olhao in May

This data display average monthly climate indicators in Olhao in May based on our historical weather readings over a period of ten years. In addition to temperature, we include data on the number of rainy and sunny days so you can have all the information about your destination before your trip

  • Average HIGH temperature22°C
  • Average LOW temperature12°C
  • Average rainfall days5 days
  • Average rainfall1.2''/30mm
  • Average daylight14h
  • Average sunshine10h
  • Average UV index8

Olhao water temperature during other months:

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

Where is the warm sea water in May?

Want to know where the water temperature in May is good for swimming? Select the continent of interest, the day of the month and the required water temperature

Region
Date (day and month)
Water temperature: min 16°C
 Average temperature  Maximum temperature

Temperature in neighboring cities

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

AvrMinMax
Ilha do Farol18°C15.7°C21.6°C
Ilha da Armona17.9°C15.2°C21.9°C
Praia dos Cavacos17.9°C15.2°C21.9°C
Barreta Island18°C15.9°C21.2°C
Praia de Faro17.9°C15.6°C21.8°C
Quinta do Lago Beach17.8°C15.5°C21.7°C
Praia do Barril17.9°C15.2°C22°C
Quarteira17.7°C15.4°C21.7°C
Almancil17.7°C15.4°C21.7°C
Vale do Lobo17.7°C15.4°C21.7°C

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[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

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Our report for Olhao 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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