Last updated: March 2026
The tide predictions and related information provided on TideCheck (tidecheck.com) are generated using harmonic analysis and mathematical models. They are intended for general informational and educational purposes only.
These predictions are not suitable for navigation. They are designed to help you plan beach visits, surfing, fishing, diving, kayaking, and other coastal activities.
While we strive for accuracy, tide predictions are mathematical approximations based on harmonic constituents and astronomical calculations. Actual water levels can differ from predicted values due to:
Do not rely on TideCheck predictions for navigation, maritime safety, or any activity where inaccurate tide information could result in danger to life or property. For official tide data, consult your national hydrographic office or maritime authority (e.g., NOAA in the United States, UKHO in the United Kingdom, BOM in Australia).
Heights are displayed relative to a selected vertical datum (LAT, MLLW, or MSL). Datum values are derived from published sources and may not precisely match local chart datum at all locations. Users should verify datum references for their specific location with official sources.
Predictions for subordinate (secondary) stations are derived by applying time and height corrections to a nearby reference station. These corrections are approximations and may have reduced accuracy compared to direct harmonic predictions.
Some stations are derived from the FES2022 global ocean tide model rather than direct tidal observations. While FES2022 is a state-of-the-art model, accuracy may be reduced in shallow waters, estuaries, and areas with complex coastal geometry. These stations are identified by their "FES2022" data source label.
TideCheck, its operators, and contributors shall not be held liable for any loss, damage, injury, or inconvenience arising from the use of information provided on this website. Use this data at your own risk.
Station data is sourced from publicly available databases including NOAA CO-OPS (United States), the TICON-4 international tide database (CC-BY-4.0), and FES2022 global ocean tide model (AVISO+). See our About & Sources page for full attribution details. We do not guarantee the accuracy or completeness of source data.
This website may contain links to external sites. We have no control over and accept no responsibility for the content or practices of third-party websites.