Two dates. A clearer tide plan.
Compare NOAA high and low predictions, keep the local time and station reference together, then take a printable plan with you.
Plan A
North Jetty, Tillamook Bay
Checking your device clock before showing current planning dates.
Plan B
North Jetty, Tillamook Bay
Checking your device clock before showing current planning dates.
Each column uses its own station’s local time and MLLW reference. Heights at different stations do not share a universal zero. Only NOAA’s supplied high/low events are shown; the toolkit does not estimate levels between them.
Snapshot retrieved: 2026-09-29T01:45:15.047Z. Dates available for planning follow your device clock in each station’s time zone. Predictions are astronomical, not observed water levels or a weather forecast. Check local conditions and official guidance before visiting.
How to use the comparison
- Choose the named NOAA reference station for each plan. Read its location context before assuming it represents a nearby beach.
- Pick two available local dates, or the same date at different stations.
- Read each high and low event in that column’s time zone. Download the underlying events or print both plans.
A worked example
To compare two possible days near San Diego, select San Diego in both columns and choose consecutive available dates. Find the first low-water event in each column and compare its local time and predicted height. A hypothetical change from 8:10 a.m. to 8:55 a.m. is 45 minutes later; it does not establish a safe access window. Those example times are illustrative, not current predictions.
Questions about tide planning
Are these observed water levels?
No. These are NOAA astronomical high/low predictions. Weather and other conditions can make observed water levels differ. Check the station’s official page and local guidance.
What does MLLW mean?
Mean Lower Low Water is the reference used for these predicted heights. The reference is local to the station, so comparing a height at two stations does not compare their absolute elevations. See NOAA’s datum definitions.
Why can’t I choose a date further ahead?
The toolkit uses the prediction window in the site’s saved data. Dates before today in the station’s time zone are excluded. A missing or expired window stays unavailable; use the NOAA station link for other dates.
Can I use high and low times to calculate the water level between them?
This toolkit does not interpolate between events. A high/low list is not a continuous tide curve or a tidal-current prediction. NOAA’s data API documentation distinguishes these products and intervals.
Use the fuller tide planning worksheet → · Explore all tools →
