Understanding the Tides

Understanding the Tides 🌞 • 🌔

[🇵🇹] I kept this image, which dates from January 7, 2014, not because I didn’t accept this resumption of the sea, but because I didn’t want Good Surf Good Love to connote chaos.

I did not immediately realize that, after all, the brand comes precisely from this chaos and from the full acceptance of this coming and going of storms, tides, winds, and cyclical Sun – Moon appearances.

Today I take it out of the chest and take the opportunity to explain what factors were combined in this Molotov cocktail result.

On this day, there were 12 to 16 m of swell, the waves were 24 ” long, and the tide that was alive, at its maximum height, was 3.6 m.

And what are the Living Tides?

Anyone who has spent entire summer days on the beach knows that the tide comes and goes.

This action between High Tide or High Tide and Low Tide or Low Tide is caused by the gravitational action of the Moon and the Sun.

🌔 • 🌞

“Tides are periodic fluctuations in sea level and are the result of the attraction of the Sun and Moon over the liquid particles of the oceans”. At https://tabuademares.com/mares

Interesting details to know:

1. As the Earth, the Moon, and the Sun combine in different alignments, they generate different types of tides.

2. Almost every day there are 4 tides separated by periods of +/- 40 minutes. This is the period of time that the tide takes to pass between full and empty.

3. The tides are not always at the same time.

4. Depending on the phases of the moon, we can have 2 types of tides: live tides and dead tides.

5. Live tides occur in the Full Moon and New Moon phases when the Earth aligns with the Moon and the Sun.

That is, every month there are several tides:

2 Living Tides at Full Moon and New Moon;

2 Dead Tides – on the Crescent Moon and the Crescent Moon.


In Portugal, the tides oscillate between 0.1 and 3.9m in the case of Living Tides.

In the case of Dead Tides, the variation in amplitude is very small, varying between 1.4 and 2.5m.

But be careful, in other areas of the planet the amplitudes vary within other values. In some places they are practically nil, in others, on the contrary, the differences are greater.


In conclusion, when the living tides of greater amplitude, combined with a storm of great sea agitation, and large waves of the high period – 12/20 ”, results in these “invasions”.

Sometimes there are even floods, even without rain, in coastal areas, especially when the level of these areas is low.


When high precipitation – 16mm, combined with great swell – 7 to 14m, with a high period – 17 to 19s, in a period of High Tides, does great damage. (Values ​​are exemplary).

To consult the tides you can consult here: https://www.hidrografico.pt

To consult all about the sea agitation and weather forecast consult here: https://www.ipma.pt