https://tideplanet.com/guides/ Guides to tides, currents, beach safety, waves, wind, diving, the moon and fishing, with examples from around the world. en-us Tue, 27 Oct 2026 00:00:00 GMT https://tideplanet.com/guides/biggest-tides-in-the-world/https://tideplanet.com/guides/biggest-tides-in-the-world/Mon, 26 Oct 2026 00:00:00 GMTTidesThe biggest tides in the world reach about 53 feet in Canada's Bay of Fundy. Where else the sea rises highest, from Alaska to Maine and France, and why. https://tideplanet.com/guides/rule-of-twelfths/https://tideplanet.com/guides/rule-of-twelfths/Mon, 26 Oct 2026 00:00:00 GMTTidesThe rule of twelfths lets you calculate tide height at any time: 1, 2, 3, 3, 2, 1 twelfths. A worked Boston example, bar crossings and when it fails. https://tideplanet.com/guides/storm-surge/https://tideplanet.com/guides/storm-surge/Mon, 26 Oct 2026 00:00:00 GMTTidesStorm surge is the rise in sea level a storm causes on top of the tide. How wind and low pressure drive it, storm surge vs. storm tide, and why timing matters. https://tideplanet.com/guides/why-tides-differ-from-predictions/https://tideplanet.com/guides/why-tides-differ-from-predictions/Mon, 26 Oct 2026 00:00:00 GMTTidesWhy is the tide higher than predicted? Air pressure, wind, waves, rivers and seiches move the water, and so do station, time zone and datum mix-ups. https://tideplanet.com/guides/supermoon-and-king-tides/https://tideplanet.com/guides/supermoon-and-king-tides/Mon, 26 Oct 2026 00:00:00 GMTTidesSupermoon tides and king tides: what a supermoon is, how much bigger it looks, how much higher the tide really gets, and the supermoons of 2027. https://tideplanet.com/guides/barometric-pressure-and-fishing/https://tideplanet.com/guides/barometric-pressure-and-fishing/Mon, 26 Oct 2026 00:00:00 GMTFishingBarometric pressure and fishing: what studies actually show, the best barometric pressure for fishing according to anglers, and what matters more. https://tideplanet.com/guides/rip-currents/https://tideplanet.com/guides/rip-currents/Mon, 26 Oct 2026 00:00:00 GMTSea and safetyRip current safety: how to spot a rip from the beach, how to escape one if it pulls you out, and how to help someone else without becoming a second victim. https://tideplanet.com/guides/beach-warning-flags/https://tideplanet.com/guides/beach-warning-flags/Mon, 26 Oct 2026 00:00:00 GMTSea and safetyBeach flag colors and meanings: green, yellow, red, double red and purple flags in the US, plus the red-and-yellow flags used in the UK and Australia. https://tideplanet.com/guides/jellyfish-at-the-beach/https://tideplanet.com/guides/jellyfish-at-the-beach/Mon, 26 Oct 2026 00:00:00 GMTSea and safetyJellyfish at the beach: what to do if you get stung, what never to do, when vinegar helps and when it hurts, and when a sting means calling 911. https://tideplanet.com/guides/lightning-safety-at-the-beach/https://tideplanet.com/guides/lightning-safety-at-the-beach/Mon, 26 Oct 2026 00:00:00 GMTSea and safetyLightning at the beach: why sand and water are so exposed, how far lightning can strike from a storm, where to shelter and why you wait 30 minutes. https://tideplanet.com/guides/how-to-read-a-surf-forecast/https://tideplanet.com/guides/how-to-read-a-surf-forecast/Mon, 26 Oct 2026 00:00:00 GMTWaves, wind and divingHow to read a surf forecast: significant wave height, swell period and direction, offshore vs onshore wind and tide, with a sample surf report explained. https://tideplanet.com/guides/swell-period/https://tideplanet.com/guides/swell-period/Mon, 26 Oct 2026 00:00:00 GMTWaves, wind and divingSwell period explained: why waves with more seconds between crests carry more energy and break bigger, what period is good for surfing and typical U.S. values. https://tideplanet.com/guides/beaufort-scale/https://tideplanet.com/guides/beaufort-scale/Mon, 26 Oct 2026 00:00:00 GMTWaves, wind and divingBeaufort scale chart from force 0 to 12 in knots, mph and m/s, with each force's name, sea state and wave height, plus what force 7 means. https://tideplanet.com/guides/knots-to-mph/https://tideplanet.com/guides/knots-to-mph/Mon, 26 Oct 2026 00:00:00 GMTWaves, wind and divingKnots to mph: a knot is one nautical mile per hour, about 1.151 mph or exactly 1.852 km/h. Chart from 1 to 60 knots, mental math tricks and the name's origin. https://tideplanet.com/guides/diving-and-tides/https://tideplanet.com/guides/diving-and-tides/Mon, 26 Oct 2026 00:00:00 GMTWaves, wind and divingBest tide for diving and snorkeling: why slack water matters, why it often isn't at high tide, when visibility is best and how to plan the time of your dive. https://tideplanet.com/guides/water-temperature-and-wetsuits/https://tideplanet.com/guides/water-temperature-and-wetsuits/Mon, 26 Oct 2026 00:00:00 GMTWaves, wind and divingWetsuit temperature chart in °F and °C: what thickness you need (3/2, 4/3, 5/4), how surfing, diving and swimming differ, and how cold water shock works. https://tideplanet.com/guides/what-causes-tides/https://tideplanet.com/guides/what-causes-tides/Fri, 23 Oct 2026 00:00:00 GMTTidesTides are the rise and fall of the sea driven by the moon and sun. See why most coasts get two high tides a day and why they come about 50 minutes later. https://tideplanet.com/guides/how-to-read-a-tide-chart/https://tideplanet.com/guides/how-to-read-a-tide-chart/Fri, 23 Oct 2026 00:00:00 GMTTidesWhat the times, heights and minus signs on a tide chart mean, with a worked Charleston example and the rule of twelfths to estimate the water hour by hour. https://tideplanet.com/guides/spring-and-neap-tides/https://tideplanet.com/guides/spring-and-neap-tides/Fri, 23 Oct 2026 00:00:00 GMTTidesWhy tides run bigger around every new and full moon and smaller at the quarter moons, what king tides are, and how Europe's tide coefficient rates them. https://tideplanet.com/guides/types-of-tides/https://tideplanet.com/guides/types-of-tides/Fri, 23 Oct 2026 00:00:00 GMTTidesSome coasts get two even tides a day, some get two uneven ones, and some get just one. What semidiurnal, mixed and diurnal tides are, and why they happen. https://tideplanet.com/guides/tidal-currents/https://tideplanet.com/guides/tidal-currents/Fri, 23 Oct 2026 00:00:00 GMTSea and safetyWhen the tide rises and falls, the water also moves sideways. What flood, ebb and slack water mean, when currents run hardest, and where to be careful. https://tideplanet.com/guides/solunar-theory/https://tideplanet.com/guides/solunar-theory/Fri, 23 Oct 2026 00:00:00 GMTFishingWhat solunar theory is, how the moon sets the major and minor periods, and how to use them for fishing alongside the tide, the light and the weather. https://tideplanet.com/guides/fishing-the-tides/https://tideplanet.com/guides/fishing-the-tides/Fri, 23 Oct 2026 00:00:00 GMTFishingWhen to fish the incoming tide, the outgoing tide or slack water, from the beach, a jetty or a boat, with a worked example for planning a morning trip. https://tideplanet.com/guides/moon-phases-and-fishing/https://tideplanet.com/guides/moon-phases-and-fishing/Fri, 23 Oct 2026 00:00:00 GMTFishingHow the moon affects fishing through the tides, night light and solunar periods, which phases anglers favor for different fish, and what is just folklore. https://tideplanet.com/guides/dawn-dusk-and-golden-hour/https://tideplanet.com/guides/dawn-dusk-and-golden-hour/Fri, 23 Oct 2026 00:00:00 GMTFishingWhat civil, nautical and astronomical twilight and golden hour mean, how long they last across the US, and why dawn and dusk are prime times to fish. https://tideplanet.com/guides/chart-datum-and-mllw/https://tideplanet.com/guides/chart-datum-and-mllw/Fri, 23 Oct 2026 00:00:00 GMTTidesWhat chart datum and MLLW are, why US tide charts show minus tides, and how to add tide height to charted depth to know how much water you really have. https://tideplanet.com/guides/why-some-seas-have-almost-no-tide/https://tideplanet.com/guides/why-some-seas-have-almost-no-tide/Fri, 23 Oct 2026 00:00:00 GMTTidesThe Mediterranean, the Baltic and the Great Lakes barely have tides, and Gulf of Mexico tides are small and once a day. Here's why, and what moves the water. https://tideplanet.com/guides/tide-safety/https://tideplanet.com/guides/tide-safety/Fri, 23 Oct 2026 00:00:00 GMTSea and safetyHow to avoid getting cut off by the tide when you wade, dig clams, fish the flats or explore tide pools, and why the lowest minus tides need the most care.