Puerto Galera Tide Tables
Puerto Galera tides tables Philippines information: The tides around Puerto Galera are affected by the ebb (westerly direction, moderate) and flood (easterly direction, weak) through the Verde Island Passage. Tides within the Verde Island Passage have maximum overall speeds of between two and three knots on the ebb; zero to one knot on the flood. Tide races of up to five knots (including noticeable surface features such as rip-tides, tidal eddies, whirlpools and up-surges) are apparent at times of peak flow, around the ends of Verde Island, Maricaban Island, around the Baco Islands (15 miles East of Puerto Galera) and through the Calavite Passage (26 miles West of Puerto Galera).
The daily tide range around Puerto Galera (and throughout most of the Philippines) is between a maximum 1.9 meters (spring tides) and a minimum of 0.8 meters (neap tides). Tides around the Philippine archipelago are frequently diurnal tides (occurring once a day) and less frequently mixed-semi-diurnal tides (occurring twice a day with different highs and lows), around the full moon and new moon.
We provide here tide table data for Puerto Galera as supplied on the tideschart.com website.
The Puerto Galera Yacht Club provides a copy of local Puerto Galera tide tables from NAMRIA, reprinted daily and posted on the club notice board.
The Moon The Sun & The Tides
The main driving force that creates what we call "Tides" is the Earth’s proximity to the Moon; the Earth’s proximity to the Sun is also a factor but the Sun’s relative influence is less than 50% that of the Moon’s.
Essentially, Tides occur because of the gravitational force exerted by the Moon and the Sun on the surface water that flows across planet Earth. The force of gravity exerted by the Moon (and the Sun) attracts the surface water on the side closest to the Moon (and the Sun), which, because Earth’s oceans are contiguous, causes the surface water to be inclined to move from one portion of the globe to another, creating a "bulge" that we call a Tide — although subject to the same gravitational forces, an enclosed body of water (a small lake for example) will not appear to the observer to be subject to a Tide. There is also a relatively negative force on the surface water, on the portion of the Earth farthest from the Moon (and Sun) causing this portion of the water to produce an opposing bulge.
As the Earth rotates on its axis (approximately every 24 hours), the gravitational force of the Moon and the Sun cause two tidal movements every day (one by virtue of the bulge and one by virtue of the opposing bulge). Depending on the Latitude of observation and the relative locations of the Moon & the Sun, the gravitational force actually produces one (diurnal) or two (semi-diurnal) Tides for every period of 24 hours + 50 minutes (the extra 50 minutes is by virtue of the Moon’s progressive orbit around the Earth); the progression from High Tide to Low Tide to High Tide takes (approximately) 12 hours 25 minutes. Because the rotation of the Earth and the orbits of the Moon are predictable, Tides are also predictable.
Spring Tides & Neap Tides
Spring Tides occur when the Moon & Sun are at opposite & at the same sides of the Earth — to the observer on Earth this occurs at the Full Moon and the New Moon. Spring Tides produce the largest Tide Range (difference between High Tide and Low Tide). One complete cycle from Full Moon to Full Moon takes 27 days and 8 hours
Neap Tides occur when the Moon and the Sun are generally perpendicular to each other in respect of the Earth — to the observer on Earth this occurs at the First Quarter and Last Quarter phases of the Moon. Neap Tides produce the smallest Tide Range.
Tides near the Equator and near the Poles generally feature a small Tide Range (one to two meters) by comparison to the Tide Range observed at mid–latitudes (five to fifteen meters). The difference is mostly due to the tilt in the axis of the Earth relative to the Moon and the Sun, but the presence and specific geography of a land mass, that effectively obstructs the surface water from moving smoothly around the globe, also has an effect relative to the obstruction it presents to the flow of surface water.
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