≈Tide & Marine Conditions
Tide & Marine ConditionsEvidence report · prepared 30 August 2026https://tide99.com/entity/8418150
NOAA station 8418150

ME

Portland

Official tide predictions with the datum, units and time basis kept visible.

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DatumMLLWThe vertical reference for the published height
Time basislst_ldtRetained from the NOAA response
Coverage1415 predictions719 recent observations stored

Published location

Where is Portland?

This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.

43.658054, -70.244160

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Map data © OpenStreetMap contributors

Visual evidence

Next published tide heights

The chart visualises the values listed in the table below; it does not interpolate missing records.

2026-08-30 00:52: 3.0472026-08-30 07:01: -0.0292026-08-30 13:14: 2.9962026-08-30 19:20: 0.0092026-08-31 01:31: 3.0172026-08-31 07:38: -0.0192026-08-31 13:50: 3.0672026-08-31 20:02: -0.0342026-09-01 02:12: 2.9552026-09-01 08:18: 0.0242026-09-01 14:30: 3.1072026-09-01 20:48: -0.042026-09-02 02:58: 2.8632026-09-02 09:02: 0.0952026-08-30 00:522026-09-02 09:02

Plan the next water window

Next published high and low tides

Published timeEventHeight
2026-08-30 00:52High3.047 m
2026-08-30 07:01Low-0.029 m
2026-08-30 13:14High2.996 m
2026-08-30 19:20Low0.009 m
2026-08-31 01:31High3.017 m
2026-08-31 07:38Low-0.019 m

How to read this page

Predicted heights are astronomical estimates relative to MLLW. Weather, pressure, wind and river flow can move observed water away from the prediction.

For navigation or safety

This is a planning aid, not a navigational chart or warning service. Check NOAA notices, local conditions and official marine guidance before acting.

Source, identifiers and limitations
Station ID
8418150
Source
NOAA CO-OPS Data API
Prediction datum
MLLW
Time basis
lst_ldt

Read the full source and methodology record