Mexico · coast guide
Understanding the coast of Mexico
This guide explains the coast of Mexico on the Pacific, the Caribbean; calculations, observations and product limits remain distinct.
Read a local tide
Times and heights depend on the port, datum and station timezone. Mexico includes Pacific, Gulf of California, Gulf of Mexico and Caribbean coasts. SEMAR’s tide-gauge network and tables are read by port or region; a Pacific time does not replace a Gulf or Caribbean reference. Always retain the port, datum and maritime zone. A value from another place cannot be carried to a nearby beach. Mareloa preserves the source and timestamp of its data but does not replace the national hydrographic reference.
Tidal range and coast
Bays, lagoons, open coasts and different seas produce different ranges and times. A national calendar cannot establish conditions on a particular beach. Begin with the table for the relevant region and complete preparation with published local information. Tidal range is the vertical difference between low and high water. Bays, depth and coastal shape change it, so one astronomical cycle does not create the same range everywhere. Mareloa creates no national coefficient for Mexico and infers no access from one number.
Prediction, model and observation
A tide table, observed level and marine forecast are different products. Wind, pressure and swell can change actual level or conditions. Do not combine categories or turn a missing observation into a favourable signal. An astronomical prediction calculates a periodic component. A model adds assumptions; an observation is a measurement at a station and time. Wind, pressure, waves and geography can change actual level. These categories remain separate and missing evidence never becomes reassuring.
Plan a coast visit
Water quality, health notices, fishing, protected areas and access depend on particular authorities and municipalities. Review their publications and beach signs before a visit. This guide gives source context, not permission or navigation instruction. Use this guide to understand provenance, not to decide an activity. Restrictions, health notices, access and signage are local and can change. Consult the competent authority and on-site information; Mareloa is not a navigation tool.
Reviewed source
This page cites and links to this public reference; it does not reproduce its tables.
Reviewed 2026-09-11.