I don't live near the ocean or I'd venture a guess at the position of the moon.

As someone who surfs and fishes in coastal waters, tide is obviously important to me.

Online, there are a variety of useful tide charts which can be quite specific for your particular area. Here in the U.S., one of the best sites to use is the National Oceanic and Atmospheric Administration (NOAA) website "http://tidesandcurrents.noaa.gov/". They provide free access to an impressive amount of data, information, and even explanation of said data, including a nifty interactive map which the user customizes by selecting a location along with the specific data desired (including, but not limited to high/low tides).
In their words "NOAA Tides and Currents is the portal to the vast collection of oceanographic and meteorological data (historical and real-time), predictions, and nowcasts and forecasts."

While certainly not as precise, for the avg. layperson there are now fairly cheap watches which make it quite easy to know the tides. They resemble your basic plastic timex watch, and are made by free shark, casio, etc. Most use a digitally(?) rendered wave graph. They can be purchased starting from around $50 bucks on up.

Also, although it takes a lot of outdoor time to establish, one of the simplest ways to gauge tides is to roughly know the depth and speed of tidal creeks in relation to the tides. Many times there is visible evidence (such as high tide line, oyster beds, bank stains, plough mud indentations, etc.) that can be combined with real time depth/speed/direction simple observations, from which you can get a good idea of what's happening. Various factors such as recent rainfall/drought, erosion, etc. can influence and alter the outcome but it works good in determining a rough guesstimate while 'in the field' without any outside source of info. or help.

In India we follow lunar calendar where amonth comprises two fortnights each with days numbered from 1 to 15.You multiply the numeral of the day by 0.75 and ypuranswer is the time of the day for high tide on that particular day.There are two high tides in a 24 hour day,each lastin 1.5 hours=Bakool Khanderia=

In the Philippines, PAGASA issues daily announcements on Weather, Climate changes and other related information.

The daily Public Weather Forecast is posted here:
http://www.pagasa.dost.gov.ph/wb/wxfcst.html

However, PAGASA gets the information for High Tide and Low Tide from NAMRIA:
http://www.namria.gov.ph/home.asp

Today (7/12/06) high tide was at 10:04AM for Manila Bay.

Can't tell you without looking at a tide table.

Stewart Brand suggested this tool:

Tide Tool 2.2!

http://www.toolworks.com/bilofsky/tidetool/index.html

It's for Palm OS PDAs like my Treo. It's freeware. It's graphic. It finds the data for anywhere, anytime, including info on sun and moon.

Too easy today - it's full moon.
High tide is noon and midnight, close enough
for boating...

Check the phase of the moon. The phase will give you a good idea of the moon's position. When it is directly above you or below you will be pretty close to high tide... this effect could be delayed if the water has to move through an inlet (like if you are on a bay rather than the open ocean) or by similar geographical factors. Full/new moon? High tides should be close to midnight and noon.

1. Buy a tide times book
2. listen to the weather report
3. Ask a fisherman
4. Look it up on the net
5. Go to the seashore with sunscreen and a book. Wait. Watch. You'll like it

Dunno anymore, but I used to know ever yday when I lived in Bayonne. Star-Ledger always had tidal charts 2nd page, plus I did a lot of fishing. I always know how to find this info out; on rides home if I smell the water, it's low tide so high tide's 12 hours away....