The IOC Sea Level Station Monitoring Facility shows operational observations from contributing organizations worldwide, including Thai providers. Search for the relevant station and inspect its latest timestamp before using the reading.
The facility includes station lists and detail views. Thailand appears through contributing organizations including the Royal Thai Navy and the Asian Disaster Preparedness Center; keep the provider and station identifier with any observation.
The facility says most stations report every minute and the site updates every five minutes. Confirm that the selected station is actually reporting and note gaps before treating a value as current.
These are raw operational contributions from multiple providers. Quality, continuity and availability vary, so one station view is not a complete national tide-gauge archive or a prediction for every beach.